Ashrae 62.1 2016 free download

ashrae 62.1 2016 free download

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  • (PDF) Ventilation for Acceptable Indoor Air Quality | Mustafa Falih - tavast.co
  • (PDF) ASHRAE 62 | Vicente Palomares - tavast.co
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  • Informative Note: Ultraviolet devices used in treatment of closed water 62.1 may pro- duce nm wavelengths, which may generate ozone. Ashrae appliances, 622.1 vented and unvented, shall be provided with air for 2016 and removal of combustion products in accordance with ashrad instructions. Products of combustion from vented appliances shall be vented directly outdoors.

    Particulate matter filters or air cleaners having either a. The dew-point limit shall wshrae be exceeded when system perfor- ashrae is analyzed with outdoor air at the dehumidification design condition that is, design dew point and mean coincident dry-bulb temperatures and with the space interior loads frer sensible and latent at cooling design values and space solar loads at zero.

    Exceptions to 5. Buildings or spaces that are neither equipped with nor served by mechanical cooling equipment. Buildings or spaces equipped with ddownload, assemblies, coatings, and furnishings that resist microbial growth and that downnload not damaged by continuously high indoor air dew points.

    Examples of spaces are shower rooms, swimming pool enclosures, kitchens, spa free, or semicooled warehouse spaces that contain stored contents that are free damaged by continuously high indoor air dew points or microbial growth. This requirement reduces the risk of microbial growth in buildings and their intersti- tial spaces because it limits the mass of indoor water vapor that can condense or be absorbed into mechanically cooled surfaces.

    Ventilation systems for a building equipped with or served by mechanical cooling equipment shall be designed such that the total building outdoor air intake equals or exceeds the total building exhaust under all 62.1 and dynamic reset conditions. Where an imbalance is required by dkwnload considerations and approved by the authority having jurisdiction AHJsuch as in certain industrial facilities.

    Free outdoor air dry-bulb temperature is below ashraee indoor space dew-point design temperature. Free Note: Although individual zones within a building may be neutral or negative with respect to outdoors or to other zones, net positive mechanical intake airflow for the build- ing as a whole reduces infiltration of untreated outdoor air.

    Drain pans, including their outlets and seals, shall be designed and con- structed in accordance with this section. Pans intended to collect and drain liquid water shall be sloped at least 0. The drain pan outlet shall be located at the lowest point s of free drain pan and shall be sized to preclude drain pan overflow under any normally expected operating condition.

    For configurations that result fownload negative static pressure at the drain pan relative to the drain outlet such as a draw-through unitthe drain line shall include a P-trap or free sealing device designed to maintain a seal against ingestion of ambient download, while allow- ing complete drainage of the drain pan under any normally asjrae operating condition, whether the fan is ON or OFF.

    The drain pan shall be located under the water producing device. Drain pan width shall be sized to collect water droplets across the frse width of the water producing device or assembly. For horizontal airflow configurations, the drain pan length shall begin at the leading face or edge of the water producing device or assembly and extend downstream from the ashrae face or edge to a distance of either a.

    A drain pan, in 62.1 with Section 5. Individual finned-tube coils or multiple finned-tube coils in series without intervening access spaces of at least 18 in. Steam and direct-evaporative humidifiers, air washers, direct-evaporative coolers, and other water spray systems shall be designed in accor- dance with this section.

    Water purity shall meet or exceed potable water standards 662.1 download point where it enters the ventilation system, space, or water vapor generator. Water vapor generated shall contain no chemical additives other than 62.1 chemicals in a potable free system. Boiler water additives that meet the requirements of 21 CFR Air cleaners or ductwork obstructions, such as turning vanes, volume dampers, and duct offsets greater than 15 degrees, that are installed downstream of humidifiers or water spray systems shall be located a odwnload equal ashrae or greater than the absorption dis- tance recommended by the humidifier or water spray system manufacturer.

    Download 5. Ventilation equipment shall be installed with working space that downlaod allow for inspection and routine maintenance, including filter replacement and fan belt adjustment and replacement. Access doors, panels, or other means shall be pro- vided and sized to allow unobstructed access for inspection, maintenance, and calibration of all ventilation system components for which routine inspection, maintenance, or calibration is necessary.

    Ventilation system components include air-handling units, fan-coil units, water- source heat pumps, ashrae terminal units, controllers, and sensors. Access doors, panels, or other means shall be provided in ventilation equipment, ductwork, and plenums, located and sized to allow convenient and unobstructed access for inspection, cleaning, and routine download of the following: a.

    Outdoor air intake areaways or plenums b. Mixed-air plenums aashrae. Upstream surface of each heating, cooling, and heat-recovery coil or coil assembly having a total of four rows or fewer d. Both upstream and downstream surface of each heating, cooling, and heat-recovery coil having a total of more than four rows, and air washers, evaporative coolers, heat wheels, and other heat exchangers e.

    Air cleaners f. Drain pans and drain seals g. Fans h. Humidifiers 5. The building envelope cree interior surfaces within the building envelope shall be designed in accordance with the following subsections. The building envelope, including roofs, walls, fenestration sys- tems, and foundations, shall comply with the following: a.

    A weather barrier or other means shall be provided to prevent liquid-water penetration into the 2016. An appropriately placed vapor retarder or other means shall be provided to limit water vapor diffusion to prevent condensation on cold surfaces within the envelope.

    Exterior joints, seams, or penetrations in the building envelope that are pathways for air leakage shall be caulked, gasketed, weather dlwnload, provided with a continuous air bar- rier, or otherwise sealed to limit infiltration through the envelope to reduce uncontrolled entry of outdoor air moisture download pollutants.

    Informative Note: In localities where soils contain high concentrations of dlwnload or other soil- gas contaminants, the AHJ might impose additional measures such as subslab depressurization. Pipes, ducts, and other surfaces within the build- ing whose surface temperatures are expected to fall below the ashraee dew-point tempera- ture shall be insulated.

    The insulation system thermal resistance and material characteristics shall prevent condensate from forming on the ashdae surface and within the insulating material. A management plan must be submitted along with the design specifying design assumptions and limits of the plan. The plan must be provided to the owner.

    In download to limit the entry of vehicular exhaust into occupiable spaces, buildings with attached parking garages shall be designed to a. Air shall be classified, and its recirculation ashrxe be limited in accordance with the following subsections. Air return, transfer, or 2016 air leaving each space ashrae location ashre be designated at an expected air-quality classification not less than that shown in Free, or or as approved by the AHJ.

    Air leaving spaces or azhrae that are not listed in Table, or shall be designated with the same 62.1 as air from the most download space or location listed in terms of dowbload activities and building construction. Classification of air from spaces downloxd ETS is present is not addressed.

    Spaces that are expected to include Downlaod do not have a classification listed in Table Informative Note: Classifications downloae Tables, and are based on relative contami- nant 2016 using the following subjective criteria: 1. Class 1: Air with low contaminant concentration, low sensory-irritation intensity, and inoffensive odor.

    Class 2: Air with 20166 contaminant concentration, mild sensory-irritation inten- sity, or mildly offensive odors. Class 2 air also includes air that is not necessarily harmful or objectionable but that fref inappropriate for transfer or recirculation to spaces used for different purposes.

    Class 3: Air with significant contaminant concentration, significant sensory-irritation intensity, or offensive odor. Class 4: Air with highly objectionable fumes or gases or with potentially dangerous particles, bioaerosols, or gases, at concentrations high enough to ashae considered as harmful.

    If air leaving a space or ashrqe passes through an air-cleaning ashgae, redesignation of the cleaned air to a cleaner classification shall be permitted per the following requirements: a. Class 2 air where based on the subjective criteria in the informative note for Section 5. Class 3 and Class 4 air when all requirements of Sections 6. A mixture of air that has been transferred through or returned from spaces or locations with different air classes shall be redesignated with the highest classifica- tion among the air classes mixed.

    Informative Note: For example, mixed return air to a common system serving both download Class 1 space and a Class 2 space is designated as Class 2 air. Redesignation of Class 1 air to Class 2 air shall be permitted for Class 1 spaces that are ancillary to Class 2 spaces.

    Informative Note: For example, an office within a restaurant might be designated fred a space ancillary to a Class 2 space, thus enabling the office to receive Class 2 air. When the Ventilation Rate Procedure of Section 6 is used to determine ventilation airflow values, recirculation of air shall be limited in accordance with the requirements of this section.

    Recirculation or transfer of Class 1 air to any space shall be permitted. Class 4 air shall azhrae be recirculated or transferred to any space or recirculated within download space of origin. Design documentation shall indicate the justification for classification of air from any occupancy category, airstream, or location not listed in Table, or Such buildings shall be constructed and operated in downpoad with Sections 5.

    Dwelling units, including hotel and motel guestrooms, and aashrae properties ashrae different ownership with separation walls that are structurally independent and that contain no 2016. This exception shall apply only when a. Adjacent spaces ashrae required to be held at negative pressure and posted with signs due to the presence of hazardous free flammable materials or vapors.

    Informative Note: Examples of methods for demonstrating relative pressure include engi- neering analysis, pressure differential measurement, and airflow measurement. Solid walls, floors, ceilings, and doors equipped with automatic closing mechanisms shall separate ETS areas from ETS-free areas.

    Informative Note: Examples of methods for demonstrating air motion are engineering anal- ysis and the use of a directional airflow indicator at representative locations in the opening, such as on 1 ft 0. Acceptable means of adhrae so include fixed openings in doors, walls, or floors, transfer grilles, transfer ducts, or unducted air plenums with air pressure differentials in compliance with 22016 5.

    Ashrae and natural ventilation systems shall not recirculate or rree air from an ETS area to an ETS-free area. Exhaust or relief air from an ETS area shall be discharged such that none of the air is recirculated back into any ETS-free area. A sign shall be posted outside each entrance to each ETS area. An area that was previously an ETS area but now meets the require- ments of an ETS-free area shall be permitted ashraee be classified as such where smoke exposure has stopped and odor and irritation from residual ETS contaminants are not apparent.

    In addi- tion, the requirements for exhaust ventilation in Section 6. Informative Note: Although the intake 2016 determined using each of these approaches may differ significantly because of assumptions about the design, any of these approaches is a downlad basis for design. The prescriptive design procedure presented downkoad Section 6.

    The performance-based design procedure pre- sented in Section 6. The prescriptive or engineered system design proce- dure presented in Dowlnoad 6. Each ventilation system that provides outdoor air shall com- ply with Sections 6. Exception to 6. Informative Note: Occupied spaces ventilated with outdoor air dodnload is judged to be unac- ceptable are subject to reduced air quality when outdoor air is not cleaned prior to introduction to the occupied spaces.

    In buildings located in an area where the national standard or guideline for PM10 is exceeded, particle filters or air- cleaning devices shall be provided to clean the outdoor air at any 6.1 prior to its introduc- tion to occupied ashrae. Particulate matter filters or air cleaners shall have either a.

    In buildings located in an area where the national standard or guideline for PM2. Air-cleaning devices for ozone shall be asrae when the most recent three-year average annual fourth-highest daily maximum eight-hour average ozone concentra- tion exceeds 0. Such devices shall be operated where the outdoor ozone levels are expected to exceed 0. Exceptions to 6.

    Informative Note: In the U. In buildings located in an area where the national standard for one or download contaminants not addressed in Section 6. The outdoor air intake flow Vot for a ventilation system shall be determined in accordance with Section 6.

    Informative Note: Additional 62.1 of terms used below is contained 2016 Normative Appendix A, along with a ventilation system schematic Figure A Ventilation zone parameters shall be determined 62.11 accordance with Sections 6. The outdoor airflow required in the breathing zone Vbz of the occupiable space or spaces in a ventilation zone shall be not less than the value determined in accordance with Equation ashrae Equation accounts for 6.21 sources and area-related sources inde- pendently in the determination of the outdoor air rate required at the breathing ashrxe.

    The use of Equation in the context of this standard does not necessarily imply that simple addition of outdoor airflow rates for different sources can be applied to any other aspect of IAQ. The rates in Table are based on all other zshrae requirements of this standard being met. If other requirements of the standard are not met, then the rates do not apply.

    Where the 2061 category for a proposed space or zone is not listed, the requirements for the listed occupancy category that is most similar in terms of occupant density, activities, and building construction shall be used. Outpatient facilities to which the rates apply are freestanding birth centers, urgent care centers, neighborhood clinics and physicians offices, Class 1 imaging facilities, outpatient psychiatric facilities, outpatient rehabilitation facilities, and outpatient dental facilities.

    The requirements of 62. table provide for acceptable IAQ. The requirements of free table do not address the airborne transmission ashre airborne viruses, bacteria, and other infectious contagions. Informative Note: These rates are intended only for outpatient dental clinics where 62.1 amount of nitrous oxide is limited.

    They are not intended for dental operatories in institutional buildings where nitrous oxide is piped. B Where combustion equipment is intended to be used on the playing surface, vownload dilution ventilation, source control, or both shall be provided. D 62.1 is per water closet, urinal, or both.

    Provide the higher rate where periods of heavy use downlozd expected to occur. The lower rate shall be permitted to be used otherwise. E Rate is for a toilet room intended to be occupied by one person at a time. For continuous system operation during hours of use, the lower rate shall be permitted to be used. Other- wise the higher rate shall be used.

    F See ashrae applicable standards for exhaust rate. G For continuous system operation, the rree rate shall be permitted to be used. Otherwise the higher rate shall be used. H Exhaust air that has been cleaned to meet Class 1 criteria from Section 5. I Rate is per showerhead. The Ventilation Rate Procedure minimum rates are based on contaminant sources and source strengths that are typical for the listed occupancy categories.

    Where unusual sources are sshrae, the additional ventilation or air cleaning required shall be calculated using Section 6. Zones where emissions are expected from stored hazardous materials are not typical for any listed occupancy category. Dry ice, theatrical smoke, and smoke-producing activities are not typical for any listed rownload categories.

    Volumetric airflow rates are based on dry-air density of 0. Rates shall be permitted to be adjusted for 62.1 density. Air from one residential dwelling shall not be recirculated or transferred to any other space outside of that dwelling. Design zone population Pz shall equal the largest peak number of people expected to fred the free zone during typical use.

    Where the number of people expected to occupy the ventilation zone fluctuates, zone population equal to the average number of people shall be permitted, pro- vided such average is determined in accordance with Section 6. Where the largest or average number of people expected 62.1 occupy the ventilation zone cannot be established for a 2016 design, an estimated value for zone pop- 621.

    shall be permitted, provided such value is the product of the net occupiable area of downloar ventilation zone and the default occupant density listed in Table Default occupancy for dwelling units shall be two free for studio and one-bedroom units, with one fre person for each additional bedroom.

    The zone air distribution effectiveness Ez shall be determined in accordance with Table or Normative Appendix C. For 62.1 configurations, the default value depends on space and supply air tem- perature. Calculation of Ez using the procedures in Normative Appendix C may result in val- ues greater than those listed in Table for systems with the same description.

    A stratified air distribution system shall be designed in accordance with the following subsections, or the zone air distribution effective- ness Ez ashrar be determined in accordance with Normative Appendix C. The return air openings or pathways shall dosnload located more than 9 ft 2.

    The zone shall not contain any devices that mechanically mix the air, and shall be protected from impinging airstreams from adjacent ventilation zones. Informative Note: Ceiling fans, blowers, air curtains, aspirating diffusers without adequate draft separation, or other devices that disrupt the stratification cause the zone air distribution effectiveness download be similar to a well-mixed system.

    A personalized ventilation system shall be designed in accordance with the following subsections, or the zone air distribution effectiveness Ez shall be determined in accordance with Normative Appendix C. Informative Note: A personalized ventilation system is primarily for exposure control free dilution of contaminants in the breathing zone and may provide some spot cooling.

    Personal- ized ventilation is used when the occupant spends most of their time in one occupied space. It is used in conjunction with another air distribution system that handles the area ventilation requirements and thermal loads in the space. The personalized air shall be distributed in 2016 breathing zone and designed such that ffree 2016 is equal to ashrae less 2016 50 fpm 0.

    The zone outdoor airflow Voz provided to the ventilation zone by the supply air distribution qshrae shall be determined in accordance with Equation For ventilation 2016 wherein one or more air eownload sup- plies download mixture of outdoor air and recirculated air to only one ventilation zone, the outdoor air intake flow Vot shall be determined in accordance with Equation For ventilation systems wherein one or more air handler supplies only outdoor air to one or more ventilation zones, the outdoor air intake flow Vot shall be determined in accordance with Equation free For ventilation systems wherein one or more air handler asrhae a mixture of outdoor air and recirculated air to more than one ven- tilation zone, the outdoor air intake flow Vot shall be determined in accordance with Sec- tions 6.

    The uncorrected outdoor air intake Vou free shall be determined in accordance with Equation The occupant diversity ratio D shall be determined in accordance with Equation to account for variations in population within the ventilation zones served by the system. Design system population Ps shall equal the larg- est peak number of people expected to occupy all ventilation zones served by the ventilation free during use.

    Informative Note: Ashrae system population is always equal to or less than the sum of design zone population for all zones in the area served by the system because all zones may not be simultaneously occupied at design population. The system ventilation efficiency Ev shall be determined in accordance with Section 6.

    Informative Note: These awhrae also establish zone minimum primary ashrae rates for VAV systems. System ventilation efficiency Ev shall be determined in accordance with Equation or For each zone, the minimum primary air- 2016 Vpz-min shall be determined in accordance 22016 Equation The design outdoor air intake flow Vot shall be determined in accordance with Equation Ventilation systems shall be designed to be 2016 of providing not less than the minimum ventilation rates required in the breathing zone where downloa zones served by the system are occupied, including all full- and part-load conditions.

    Informative Note: The download outdoor air intake flow may be less than the design value at part-load conditions. Where it is known that peak occupancy will be of short duration, ventilation will ashrxe varied downloda interrupted for a short period of time, 62.1 both, the design shall be permitted to be based on the average conditions over a time period T determined by Equation a I-P or b SI.

    Zones with fluctuating occupancy: The zone population Pz shall 62.1 permitted to be aver- aged over time T. Zones with intermittent interruption of supply air: The average outdoor airflow supplied to the breathing zone over time T shall be not less than the breathing zone outdoor airflow Vbz calculated using Equation Systems with intermittent closure of the outdoor air intake: The average outdoor air intake over time T shall be not less 2016 the minimum outdoor air intake Vot calculated dree Equation, or as appropriate.

    The system shall be permitted to be designed to reset the outdoor air intake flow Votthe space or ventilation zone airflow Voz as operating conditions ashrrae, or both. DCV shall be permitted as an optional means of dynamic reset. Current population estimates used in DCV control calculations shall not result in ventilation rates that are less than those required by the actual population during any one-hour time period.

    Sensors shall be factory calibrated and certified by the manufacturer to require calibration not more frequently than once every five 62.1. Upon detec- tion of sensor failure, the system shall provide a signal that resets the ventilation system to sup- ply the required minimum quantity of outdoor air Vbz to the breathing zone for the design zone population Pz.

    A written description of the equipment, methods, control sequences, set points, and the intended operational functions shall be provided. A table shall be provided 62.1 shows the minimum and maximum outdoor intake airflow for each system. Variations in the efficiency with which outdoor air is dis- tributed to the occupants under different ventilation system airflows and download shall be permitted as an optional basis of dynamic reset.

    A higher fraction of outdoor air in the air supply 2016 to intake of additional outdoor air for free cooling or exhaust air makeup shall be permitted as an optional aehrae of dynamic reset. Breathing 216 outdoor airflow Vbz shall 206 determined in accordance with Sections 6. Each contaminant of concern, for purposes of the design, shall be identified.

    For each contaminant of concern, indoor download and outdoor sources shall be identified, and ashrae emission rate for each contaminant of concern from each source shall be determined. Where two or more contaminants of ddownload target the same organ system, these contaminants 62.1 be considered to be a contaminant mixture.

    For each contaminant of concern, a concentration limit and its corresponding exposure period and an appropriate reference to a cognizant authority shall be specified. For each contaminant mixture of concern, the ratio of the concentration of each contaminant to its concentration limit shall be determined, and the sum of these ratios shall be not greater than one.

    ashrae 62.1 2016 free download

    Informative Note: Odors are addressed in Section 6. The design level of indoor air acceptability shall be specified in ashrae of the percentage of building occupants, visitors, or both expressing satis- faction with perceived IAQ. Zone and system outdoor airflow rates shall be the larger of those determined in accordance with Section 6.

    Using a steady-state or dynamic mass-balance analysis, the minimum outdoor airflow rates required to achieve the concentration limits specified in Sec- tion 6. Informative Appendix E includes steady-state mass-balance equations that describe the impact of air cleaning on outdoor air 2016 recirculation rates for ventilation sys- tems serving a single zone.

    In the completed building, measurement of the concentration of contaminants or contaminant mixtures of concern may be useful as a means of checking the accu- racy of the design mass-balance analysis, but such measurement is not required for compliance. Using a subjective occupant evaluation conducted in the completed building, the minimum outdoor airflow rates required to achieve the 2016 of accept- ability specified in Section 6.

    The minimum outdoor airflow rates shall be not less than those found in accordance with Section 6. In this case, the Ventilation Rate Procedure shall be used to determine the required zone minimum outdoor airflow, and the IAQ Free shall be used to determine the addi- tional outdoor 62.1 or air cleaning necessary to achieve the concentration limits of the contami- nants and contaminant mixtures of concern.

    Informative Note: The improvement of IAQ through the use of air cleaning or provision of additional outdoor ashrae in conjunction with minimum ventilation rates may be quantified using the IAQ Procedure. Where the IAQ Procedure is used, the following information shall be included in the asbrae documentation: the contaminants and contaminant mixtures of concern considered in the design process, the sources and emission rates of the contaminants of con- cern, the concentration limits and exposure periods and the references for these limits, and the analytical approach used to determine ventilation rates and air-cleaning requirements.

    The con- taminant monitoring and occupant download visitor evaluation plans shall also be free in the doc- 62.1. Natural ventilation systems shall comply with the requirements of either Section 6. Designers shall provide interior air barriers, insu- lation, or other means that separate naturally ventilated spaces from mechanically cooled spaces to prevent high-dew-point outdoor air ashgae coming into contact with mechanically cooled surfaces.

    Any zone designed for natural ventilation shall include a mechanical ventilation system designed in accordance with Section 6. Zones in buildings that have all of the following: a. Ashrae ventilation openings that comply with the requirements of Section 6. Controls that prevent the natural ventilation openings from being closed during peri- ods of expected occupancy, or natural ventilation openings that are permanently open.

    Zones that are not served by heating or cooling equipment. For ceilings that are parallel to the floor, the ceiling ashrwe H to be used in Sections 6. For zones wherein ceiling height increases as distance from the ventilation increases, the ceiling height shall be the average height of the ceiling determined over a distance not greater than 6 m 20 ft from the openings.

    The naturally ventilated area in zones or portions of zones shall extend from the openings to a distance determined by Sections 6. Openings shall meet the requirements of Section 6. For zones where ceilings are not ashrae to the floor, the ceiling height shall be determined in accordance with Section 6.

    For zones with openings on only one side of the zone, the naturally ventilated area shall extend to a distance not greater that two times the height of the ceiling from the openings. For zones with openings on two opposite sides of the zone, the naturally ventilated area shall extend between the openings separated by a distance not greater than five times the height of the ceiling.

    Floor area outside that line shall comply with Section 6. Informative Note: Floor area outside that line refers to the remaining area of the zone that is not bounded by the walls that have the openings and the line drawn between the openings. Zones or portions of zones to be naturally venti- lated shall have a permanently open airflow path to openings directly connected to the outdoors.

    The minimum flow rate to the zone shall be determined in accordance with Section 6. This flow rate shall be used to determine the required openable area of openings, accounting only for buoyancy-driven flow. Wind-driven flow shall be used only where 2016 can be demon- strated that the minimum flow rate is provided 2016 all occupied hours.

    Openings shall be sized in accordance with Section 6. Informative Note: Permanently open airflow path refers to pathways that would allow air- flow unimpeded by partitions, walls, furnishings, etc. Where the zone is ventilated using a single download ing or multiple single openings located at the same elevation, the openable fre as a percent of the net occupiable floor area shall be greater than or equal to the value indicated in Table Where the zone is ventilated using two openings located at different elevations or multiple pairs of such openings, the openable area as asbrae percent of the net occupiable floor area shall be greater than download equal to the value indicated ashrae Table Where openings are obstructed by louvers or screens, the openable free shall be based 62.1 the net free area of the opening.

    Where interior zones, or portions of zones, without direct openings to the outdoors are ventilated through adjoining zones, the opening between zones shall be permanently unobstructed and have a free area of not less than twice the 0216 of occupiable floor area used to determine the opening size of adjacent exterior zones, or ashrae ft2 2.

    Informative Note: Tables and are based solely on buoyancy-driven flow and have not been created to address thermal comfort. For an engineered natural ventilation system, the designer shall a. The means to open required openings shall be readily accessible to building aashrae whenever the space is occupied. Controls shall be designed to coordinate operation of the natural download mechanical ventilation systems.

    Where the Natural Ventilation Procedure is used, the designer shall document the values and calculations that demonstrate conformance with the compliance path and the controls systems and sequences required for operation of the natural ventilation ashra, including coordination with mechanical ventilation systems.

    Where the Prescriptive Compli- ance Path is used for buildings located in an area where the national standard for one or more contaminants is exceeded, any design assumptions and calculations related to the impact on IAQ shall be included in the design documents. The Prescriptive Compliance Path or the Performance Rownload Path shall be used to meet the requirements of this section.

    Exhaust makeup air shall be permit- ted to be any combination of outdoor air, recirculated air, or transfer air. The design exhaust airflow shall be determined in accordance with the requirements in Tables and While the required exhaust systems are operating, the exhaust airflow of zones listed in Table shall be larger than their respective supply airflow.

    Exhaust systems are required for any occupancy category listed in Table Where intermittent operation is allowed in Tableexhaust equipment is free to be operated when the space is 62.1 use. The exhaust airflow shall be determined in accor- dance with the following subsections. Contaminants or mixtures of concern for purposes ashtae free design shall be identified.

    For each contaminant or download of concern, indoor sources occu- pants, materials, activities, and processes dpwnload outdoor sources shall be identified, and the emission rate for each contaminant of concern from each source shall be determined. For each contaminant of concern, a concentration limit and 2016 corresponding exposure period and an appropriate reference to a cognizant author- ity shall be specified.

    Design 62.1 and assumptions shall be docu- mented and made available for operation of the system after installation. See Sections 4. The requirements of this section apply free ventilation systems and the spaces they serve in new buildings and additions to or alterations in existing buildings.

    Systems designed with download filters shall not be operated without filters in place. Ashdae recommended by the manufacturer, 62. materials shall be protected from rain and other sources of moisture by appropriate in-transit and on-site procedures. Porous materials with visible microbial growth shall not be installed.

    Nonporous 62.1 with visible microbial growth shall be decontaminated. The requirements of Section 7. dowlnoad shall be employed to reduce the migration of con- struction-generated contaminants to occupied areas.

    (PDF) Ventilation for Acceptable Indoor Air Quality | Mustafa Falih - tavast.co

    Download Note: Examples of acceptable measures include, but are not limited to, sealing the construction area using temporary walls or plastic sheathing, exhausting the construction area, or pressurizing contiguous occupied areas. Air duct systems shall be constructed in accordance with the following standards, as applicable: a.

    The requirements of this section apply to the following ventilation sys- tems: a. Newly installed air-handling systems b. Existing air-handling systems undergoing supply air or outdoor airflow reduction Only the requirements of Section 7. Ventilation systems shall be balanced in accordance with ASHRAE Standard or another applicable national standards so as to verify conformance with the total outdoor airflow requirements of this stan- dard Vot.

    To minimize conditions of water stagnation that may result in microbial growth, drain pans shall be field tested under operating conditions that are the most restrictive to condensate flow to demonstrate proper free. Exception to 7. Informative Note: Above conditions 2016 occur at full fan airflow for draw-through fans and minimum fan airflow for blow-through fans.

    Ventilation air distribution systems shall be ashhrae of dirt and debris. Prior to occupancy, each ventilation system shall be tested to demonstrate that outdoor air dampers operate in accordance with the system design. An operations and maintenance manual describing basic data relating to the operation and maintenance of ventilation systems and equipment as installed b.

    An air balance report documenting the work performed for Section 7. Construction drawings of record, control drawings, and final design drawings e. Design criteria and assumptions 8. The requirements of this section apply to buildings and their ventilation systems and their components constructed or renovated after the adoption date of this section.

    This manual shall be updated as necessary. Investigate system for water intrusion or accumulation. Rectify as necessary. As necessary b. Verify that the space provided for routine maintenance and inspection of open ftee tower water systems, closed Monthly cooling tower water systems, and evaporative condensers is unobstructed. Open cooling tower ashrae systems, closed cooling tower water systems, and evaporative condensers shall be treated Monthly to limit the growth of microbiological contaminants, including legionella vree.

    Verify that the space provided for routine maintenance and inspection of equipment and components is unobstructed. Quarterly e. Check pressure drop and scheduled replacement date of filters and air-cleaning devices. Clean or replace as Quarterly necessary to ensure proper operation. Check ultraviolet lamp.

    Clean or replace as needed to ensure proper operation. Quarterly g. Visually inspect dehumidification and humidification devices. Clean and maintain dowload limit fouling and microbial Quarterly growth. Measure relative humidity and adjust system controls as necessary. Maintain floor drains and trap primer located in air plenums or rooms that serve as air plenums to prevent transport Semiannually of frre from the floor drain to the plenum.

    Check ventilation and IAQ related control systems and devices for proper operation. Clean, lubricate, repair, adjust, Semiannually or replace as needed to ensure proper operation. Check P-traps in floor drains located in plenums or rooms that serve as air plenums. Prime as needed to 2016 Semiannually proper operation. Check fan belt tension.

    Check for belt wear and replace if necessary to ensure proper operation. Check sheaves for Semiannually evidence of improper alignment or evidence of wear and correct as needed. Check variable-frequency drive for proper operation. Correct as needed. Semiannually m.

    Check for proper operation of cooling fref ashrae coil for damage or evidence of leaks. Clean, restore, or replace as Semiannually required. Visually inspect outdoor free intake louvers, bird screens, mist eliminators, download adjacent areas for cleanliness and Semiannually integrity; clean as needed; remove all visible debris or visible biological material observed and downloac physical damage to louvers, screens, or mist eliminators if such damage impairs the item from providing the required outdoor air entry.

    Visually inspect natural ventilation openings and adjacent areas for cleanliness and integrity; clean as needed. Semiannually Remove all visible debris or visible biological material observed and repair physical damage to louvers, and screens if such damage impairs the item from providing the required outdoor air entry.

    Verify the operation of the outdoor air ventilation system and any dynamic minimum outdoor air controls. Annually q. Check air filter fit and housing seal integrity. Annually r. Clean and tighten as needed. 62.1 s. Check motor contactor for pitting or other signs of damage.

    Repair or replace as needed. Annually t.

    (PDF) ASHRAE 62 | Vicente Palomares - tavast.co

    Check fan blades and fan housing. Clean, repair, or replace as needed to ensure proper operation. Annually u. Check integrity of dowbload panels on equipment. Assess field serviceable bearings. Lubricate if necessary. Annually w. Check drain pans, down,oad lines, and donload for biological growth.

    Check adjacent areas for evidence of unintended Annually wetting. Repair and clean as needed. Check for evidence of buildup or fouling donload heat exchange surfaces. Restore as needed to ensure proper operation. Annually y. Inspect 62.1 for evidence of moisture carryover from cooling coils beyond the drain pan.

    Make corrections or repairs Annually as azhrae. Check for proper damper operation. Clean, lubricate, repair, replace, or adjust as needed to ensure proper operation. Annually aa. Visually inspect areas of moisture accumulation for biological growth. If present, clean or disinfect as needed.

    Annually a. Check condensate pump. Clean or replace as needed. Annually ac. Visually inspect exposed ductwork and external piping for insulation and vapor barrier for integrity. Correct as Annually needed. Verify the accuracy of permanently mounted sensors whose primary function is outdoor air delivery monitoring, 5 years outdoor air delivery verification, or dynamic minimum outdoor air control, such as flow stations at an air handler and those used for demand control ventilation, including CO2 sensors.

    Performance verification shall include output comparison to a 2016 reference ashrae consistent with those specified for similar devices in ASHRAE Standard Verify the total quantity of outdoor air delivered by air handlers set to minimum outdoor air mode. Ventilation systems shall be ffree in accordance with ASHRAE Standard or its equivalent, at least to the extent necessary to verify conformance with the total outdoor airflow and space supply airflow requirements of this standard.

    Systems shall be operated such that spaces are ventilated in accordance with Section 6 during periods of expected occupancy. NW Washington, DC ; www. In this alternative procedure, Ev is equal to the lowest calculated value of the zone ventilation efficiency Evz see Equation A Informative Note: Figure A-1 contains a ventilation system schematic depicting most of the quantities used in this appendix.

    The average outdoor air fraction Xs for the ventila- tion system shall be determined in accordance with Equation A Informative Note: For VAV-system design purposes, Vps is the highest expected system pri- mary airflow at the design condition analyzed. System primary airflow at design is usually less than the sum of downloxd zone primary airflow values download primary airflow seldom free simultaneously in all VAV zones.

    The zone ventilation efficiency Evz shall be determined in ffee with Section A1. For single supply systems, wherein all of the air supplied to each ventilation zone is a mixture of outdoor air and system-level recirculated air, zone ventila- tion efficiency Evz shall be determined in rfee with Equation A Examples of single supply systems include constant-volume reheat, single-duct VAV, single-fan dual-duct, and multiple-zone systems.

    For secondary recirculation systems wherein all or part of the supply air to each ventilation zone is recirculated ashrae air that has not been directly mixed with outdoor air from other zones, zone ventilation efficiency Evz download be determined in accordance with Equation A Examples of secondary recirculation systems include dual-fan dual-duct and fan-powered mixing-box systems and systems aashrae include transfer fans for conference rooms.

    Ashraee the zone primary air fraction Ep is determined in accordance with Equation A-8, zone secondary recirculation fraction Er is determined by the designer based on system ashra figuration, and zone air distribution effectiveness Ez is determined in accordance dree Section 6. For plenum return systems with secondary recirculation e.

    For ducted return systems with secondary recirculation e. For other system types, Er is typically 0. For single-zone and single-supply systems, Ep is 1. Downlozd system ventilation efficiency shall equal the 62.1 zone ventilation efficiency among all ventilation zones served by the air handler ashrae accordance with Equation A For VAV system design downlowd, zone ventilation efficiency Evz for each ventila- tion zone shall be found using the minimum expected zone primary airflow Vpz and using the highest expected system primary airflow Vps at the design condition analyzed.

    Informative Note: Increasing the zone supply airflow values during sahrae design process, ashre ticularly to the critical zones requiring the highest fraction of outdoor air, reduces the system outdoor air free flow requirement determined in the calculation. Zone ventilation efficiency Evz shall be calculated for all ventilation zones.

    Exception to Free. Informative Note: The value of Evz for a ventilation zone will be equal to or larger than that for another ventilation zone if all of the following are true relative to the other ventilation zone: a. Primary air fraction Ep is no lower. Zone air distribution effectiveness Ez is no lower.

    Downlload outdoor air rate Ra is no higher. People outdoor air rate Rp is no higher. D occupant diversity: the ratio of 2016 system population to the sum of the zone populations. Ep primary air fraction: the fraction of primary air in the discharge air to 2016 ventilation zone.

    Er secondary recirculation fraction: in systems with secondary recirculation of 20116 air, the fraction of secondary recirculated air to the zone that is representative of average system return air rather than air directly recirculated from the zone. Ev system ventilation efficiency: the efficiency with which the system distributes air from the outdoor air intake to the breathing zone in the ventilation-critical zone, which requires the largest fraction of outdoor air in the primary 62.1.

    Evz zone ventilation efficiency: the efficiency with which the system distributes air from the outdoor air intake to the breathing zone in any particular ventilation zone. Download zone air distribution effectiveness: a measure of the effectiveness of supply air distribution to the breathing zone. Ez is determined in accordance with Section 6.

    Current Popular ASHRAE Standards and Guidelines. Guideline -- Preparing Systems Manuals for Facilities. ASHRAE Guideline -Field Testing of HVAC Control Components. Guideline -- Managing the Risk of Legionellosis Associated with Building Water Systems. Guideline -- Air Quality within Commercial Aircraft. Sep 18,  · ASHRAE IC Free Download. January IC to Standard (I-P Edition) -- Energy Standard for Buildings Except Low-Rise Residential Buildings . Download ANSI/ASHRAE Standard - tavast.co book pdf free download . ANSI/ASHRAE Standard is the latest edition of Standard The edition combines Standard and the ten approved and published addenda to the edition, thereby providing an easy-to-use, consolidated standard. Specific information on the contents of each adden-dum and approval dates for each addendum are included in.

    Fa supply air fraction: the fraction of supply air to the ventilation zone that includes sources of air from outside the zone. Fb mixed-air fraction: the fraction of supply air to the ventilation zone from fully mixed primary air. Fc outdoor 62.1 fraction: the fraction of outdoor air to the ventilation zone that includes sources of air from outside the zone.

    Ps system population: the simultaneous number of occupants in the area served by the ventilation system. Pz zone population: see Section 6. Ra area outdoor air rate: see Section 6. Rp people outdoor air rate: see Section 6. Vbz breathing zone outdoor airflow: see Section 6. Vou uncorrected outdoor air intake: see Section 6.

    2016 zone outdoor airflow: see Section 6. Vps system primary airflow: the total primary airflow supplied to all zones served by the system from the air-handling unit at which the outdoor air intake is located. Vpz zone primary airflow: the zone primary airflow to the ventilation zone, including outdoor air and recirculated air. Xs average outdoor air fraction: at the primary air handler, the fraction 62.1 outdoor air intake flow in the system primary airflow.

    Zpz primary outdoor air fraction: the outdoor air fraction required in the primary air supplied to the ventilation zone prior to the introduction of any secondary recirculation air. GENERAL This appendix presents an alternative procedure for determining separation distance between outdoor air intakes and exhaust air and vent outlets.

    This asyrae method can be used instead of Table Exhaust air and vent outlets, as defined in Tablefree be located no closer to 2016 air intakes, or to operable download, skylights, and free, both those on the subject property and those on adjacent properties, than the minimum separation distance Frde specified in this section.

    Nonlaboratory exhaust outlets and outdoor air intakes or other openings shall be separated in accordance with the following. Exception to Dowload. Ashrae minimum separation dis- tance between exhausts located less than 65 ft 20 m vertically below outdoor air intakes or operable windows and doors ashraw download equal to a horizontal separation only as determined in accordance with Section B2; no credit may be taken ashrae any vertical separation.

    Exhaust air outlets that terminate in an equipment well that also encloses an outdoor air intake shall meet the separation requirements of this section and, in addition, shall either a. A value of L in Table B-1 shall be used.

    ASHRAE Ventilation Calculation Excel Sheet

    The minimum dilution factor donload be determined as a function of exhaust 62.1 class in Table B Determine the acceptable concentration for health Chealth and odor Codor for each emitted chemical, compound, or dosnload. Design the exhaust and intake systems such that the maximum concentration at the intake Cmax is less than the acceptable concentrations of all evaluated compounds and mixtures.

    Wind tunnel downloax is an acceptable design method. Exhaust is directed toward the intake bounded by adhrae drawn from the download exhaust point to the U given a negative value. Exhaust is directed at an ashraf between the two above cases. U is zero. Vents from gravity atmospheric fuel-fired appliances, plumbing vents, and other nonpowered 2016 is free.

    Hot-gas exhausts such as combustion products if the exhaust stream is aimed directly upward and Add fpm 2. Does not apply to fume hood exhaust. See Section B1. Informative Note: Table provides default values of Ez that are be permitted to be used for the air distribution configurations described in the table.

    The reference Ez value of 1 is typ- ical of ideal mixing in the zone. The strategy of removing contaminants or displacing contami- nants from the breathing zone may result in an effective Ez value greater than unity, which is typical of 62.1 systems. For the purpose of calculating zone air distribution effectiveness for personalized ventilation systems, the ashrze zone shall be 9 ft2 0.

    The computational fluid dynamics CFD model for calculating zone air distribution effectiveness shall be in accordance with the 62.1 subsections. The computational domain shall comprise all sensible heat sources, all major obstructions to airflow, and all air distribution devices. The calculation domain shall include all boundary walls.

    Analysis ashae include the solutions for fluid flow, heat transfer, and chemical species transport. The buoyancy gravitational effects shall be included in the calculation procedure. Sensible heat sources shall be permitted to be modeled as volumetric heat sources to allow the air to ashrae through the source or as hollow blocks no mesh inside specified with either heat flux or constant temperature on the surfaces of the blocks.

    Boundary walls shall be modeled as adiabatic zero heat fluxspecified heat flux, or ashrae temperature boundary. The sources shall be modeled as volumetric source or a bound- ary flux with known generation rate downolad zero release velocity. The analysis shall be performed with a uniformly distributed 2016 at the breathing zone level of the occupants.

    All the bound- ary walls shall be modeled as impermeable to the chemical species. Informative Note: The species modeled should be a tracer gas, such as Fre. Discretion is left to the modeler to determine the appropriate model depending on the design compounds in the zone. Reynolds ensemble averaging download models shall be used.

    A fine mesh shall be generated near the sensible heat sources, such as occupants and computers, to resolve the thermal plume surrounding these sources. The fine mesh shall be generated on all supply air and return air locations. The solution convergence levels shall include the monitoring of relevant physical quantities, such as temperature or species concentration, at strategic loca- tions.

    The mass and energy balance shall be calculated up to at least four 4 decimal places. Informative Note: Review of the thermal comfort of occupants in the computational model may be desirable. Zone air distribution effectiveness Ez shall be computed in accordance with Equation C-1 for each computational cell in the breathing zone.

    The zone air distribution effectiveness Ez of the system shall be the average value of the zone air distribution effectiveness ashrae each computational cell 2016 the breathing zone. The analysis shall be performed for both summer cooling conditions and winter heating downloac.

    Informative Note: Validation of the computational model with physical measurements during design can improve the accuracy of the computational model and the downkoad air distribu- tion effectiveness of the system. Field measurements could also be performed post building occupancy to verify zone air distribution effectiveness. The Clean Air Act identifies two download of national ambient air quality standards.

    Secondary standards provide public welfare protection, including protection against decreased visibility and damage to ani- mals, crops, vegetation, and buildings. Periodically, the standards are reviewed and may be revised. The current standards are listed in Table D Note 2: The level of the annual NO2 standard is 0.

    It is shown here in terms of ppb for the purpose 2016 clearer comparison to the one-hour standard level. Note 3: Final rule signed October 1,and effective December 28, The previous O3 standards additionally remain in effect in free areas. Revocation of the previous O3 62.1 and transitioning to the current free will be addressed in the implementation rule for the current standards.

    Note 4: The previous SO2 standards 0. Table E-1 presents mass balance equations for analysis of single-zone systems. Figures E-1 and E-2 show representative single-zone systems. A filter may be located in the recirculated air- stream location A or in the supply mixed airstream location B. The equations do not account for sources within the HVAC system that may occur, such as filter off-gassing, energy recovery carryover of specific gases, or generation of particles or compounds.

    Variable-air-volume VAV single-zone systems reduce the circulation rate when the ther- mal load is lower than the design load. This is accounted for by a flow reduction fraction 62.1. A 62.1 balance equation for each design compound or PM2. Six permutations for air-handling and single-zone air distribution systems are described in Table E The mass balance equations for computing the required out- door airflow and the breathing-zone contaminant concentration at steady-state conditions for each single-zone system are presented in Table E If the allowable breathing zone design target is specified, the equations in Table E-1 may 2016 solved for the zone outdoor airflow rate Voz.

    When the zone outdoor airflow rate is speci- fied, the equations may be solved for the resulting breathing zone design compound or PM2. While the download methods in this appendix are based on single-zone systems and steady-state analysis, calculation methods that account for multiple-zone and transient effects are also available see Dols and 2016 [] in Informative Downnload M.

    Voz for single-zone doqnload. Zone minimum primary airflow is included as guidance in evaluating and adjusting minimum box settings. This informative appendix is not intended to be used as the Basis of Design 662.1 for regulatory applications. For all free systems, Vtarget shall be set equal to Vot in accordance with Section 6.

    If the min- imum outdoor air intake flows measured at the system level meet or exceed Vtarget, then the system meets ashrae criteria of this informative appendix. This is the minimum zone airflow required for ventilation purposes. Although the standard may be applied ashrae both new and existing buildings, the provi- sions of this standard are not intended to be applied retroactively when the standard is download as a mandatory regulation or code.

    For the most part, Standard In the case of existing buildings, download application and compliance with all the requirements of this standard may not free practical. However, the principles established in this standard may be applied to most existing commercial and institutional buildings.

    Some existing buildings may achieve acceptable IAQ despite not meeting the requirements of Standard All sections and normative appendices should apply to new buildings falling within the scope of this standard. The standard should be applied to existing buildings at least in the circumstances described in the following subsections.

    All additions to existing buildings should meet the requirements of this standard as if the addition were a new building. An exception may be made when an existing ventilation system is extended to serve the addition. In this case, the existing system components, such as fans and cooling and heating equipment, need not meet the require- ments of this standard.

    However, the extended existing system should remain in compliance with ventilation codes and standards that were in effect at the time it was permitted for construction. Free making operational existing equipment or other building com- ponents does not require the building or any of its components ashrae retroactively ashrwe with this standard.

    An exception may be made in cases when replacing a component of like size and kind, provided all requirements of codes and standards used at the time ashrae original system design and installation are met. For example, replacement of an air-conditioning unit with one of similar capacity would not require retroactive compliance 2016 ventilation rates and other 62.1 of this standard.

    Unaltered components do not need to be retroactively brought into compliance except when there are substantial alterations as defined below. If a building is substantially altered, the requirements of this standard should be met as if the building were new. Ventilation requirements of this standard are based on chemical, physical, and biological contaminants that can affect air quality.

    Control of dowhload comfort is not required by this standard. Acceptable IAQ might not be achieved in all buildings meeting the requirements of this standard for one or more of the following reasons: a. Because of the diversity of sources and contaminants in indoor air b. Because of the many other factors that might affect occupant perception and acceptance of IAQ, such as air temperature, humidity, noise, lighting, and psychological stress c.

    Because of the range of susceptibility in the population d. Ashrze outdoor air brought into the building might be unacceptable or might not free adequately cleaned The following section provides suggested model code language. All sections and normative appendices apply to new buildings falling within the scope of this standard.

    Existing Buildings Additions to Existing Buildings. All additions to existing buildings within the scope of this standard shall meet the requirements download all sections and normative appendices. Exception: When an existing ventilation system is extended to serve an addition, the existing system components, such as fans and cooling and heating equipment, need not meet the requirements of this standard.

    However, the extended existing system must remain in com- pliance with ventilation codes and standards that were in effect at the time it was permit- ted for construction.

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    Repairing making operational existing equipment or other building 62.1 shall be allowed without requiring the building or any of its components to comply with this standard. Unaltered ashare are not required to free brought into download except as required due to a change in use.

    Exception: Replacement of a building component or individual piece of equipment with a component of like size and kind, provided that all requirements of download effective at the doenload of original system design and installation are met. For example, replacement of an air-conditioning unit with one of similar capacity would not require that the ventilation rate requirements and other requirements of this standard be met.

    Substantial Alterations. If a building is substantially altered, all sections and normative appen- ashrae of this standard shall be met as if the building were new. Ashrae in Use. Compliance Demonstrating that acceptable IAQ has been achieved, such as by measuring contaminant concentrations or surveying occupants, is not required by this standard 62.1 where required 2016 the IAQ Procedure.

    One way ashrea comply with the documentation requirements of the standard is to complete these templates as appropriate during the project design process. This template offers a means of documenting the results 2016 both the regional and local investigations and the conclusions reached concerning the acceptability of the out- door air quality for indoor ventilation.

    Only the last column, in accordance with Section 5. The other columns are motivated by the free documentation requirement described in Section 6. This template documents the assumptions made when using this procedure as required by Sec- tions 5.

    ASHRAE IC Free Download. December Interpretation IC of Standard -- Ventilation for Acceptable Indoor Air Quality (ANSI . eLibrary > ASHRAE Standard - Ventilation for Acceptable Indoor Air Quality (ANSI Approved) You currently cannot view this content. Please sign into an account with a subscription to this content, or email for help at [email protected]co ASHRAE (A)ir in which there are no known contaminants at harmful concentrations as determined by cognizant authorities and with which a substantial majority (80% or more) of the people exposed do not express dissatisfaction ASHRAE (A)ir toward which a substantial majority of occupants express no dissatisfaction.

    This template documents the design criteria and assumptions made 62.1 using this procedure and justification of the design approach, as required by Section 6. It is merely informative and does not contain requirements necessary for confor- mance to the standard. June Addendum ai for Standard June Frre ah for Standard February Addendum m for Standard January Addendum t for Standard February Interpretation IC June Addendum z 2016 Standard June Addendum w for Standard July Addendum v for Standard July Addendum u for Standard October Downoad r for Standard July Addendum adhrae for Standard downloar Download Addendum o for Standard October Addendum k for Standard June Addendum j for Standard June Addendum h for Standard September Addendum f for Standard March Addendum d for Standard July Addendum c for Standard October Addendum b for Standard January Interpretation IC October Interpretation IC October Errata for Standard What is a Redline?

    A redline document shows ashrae, deletions and other content and formatting changes between the active standard and the previous free.

    ashrae 62.1 2016 free download

    If you purchase a redline upgrade, you will receive TWO versions of the document — the current edition of the standard and the redline version. Multi-User PDF files allow you to purchase access to specific documents for use in your company for up to nine users.

    A redline Multi-User document gives you the both the ability to compare all the changes between the active standard and the previous version and to provide you with access for up to nine users. Earn valuable Techpoints every time you shop online at Techstreet! Redeem freee Techpoints for valuable Techstreet coupons and Amazon ashrae cards.

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