ASHRAE Standard , “Ventilation for Acceptable Indoor Air Quality,” presently defines the “standard of care” to be exercised by. ASHRAE Standard (Standard ) “Ventilation for Acceptable Indoor. Air Quality” is the new heating, ventilating, and air-. One requirement for implementing the ASHRAE Standard ventilation rate procedure is to provide continuous measurement of the.
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There are two major changes in this version of the Standard compared to the version. Reports, articles and other documents harvested from the Office of Scientific and Technical Information. Instead of prescribing outdoor air ventilation rates for various types of indoor spaces, the Indoor Air Quality Procedure is based on maintaining acceptable concentrations of “all known contaminants of concern.
Tables of design values for C, the maximum acceptable concentrations of indoor contaminants or source-related contaminant mixtureswould be necessary. Other additions provide opportunities for energy conservation.
The current review is focused on eight issues that have been raised over the past several years in various technical meetings and in feedback to ASHRAE from the design community. Health-based criteria and guidelines are listed for the following contaminants: Sherber How should ventilation effectiveness be defined and incorporated into the standard? Now that the revised Standard Standard is available, its usefulness needs to be evaluated.
Sherber, Carrier Corporation Steven T. Some users of Standard found the application of different ventilation rates for smoking and non-smoking areas confusing, and the recommended maximum concentration of formaldehyde was challenged.
The 13 voting members of the committee are: Showing of 59 pages in this report.
Interpretations for Standard
Once the value of G was determined, the stanrard desirable emission rate for all non- occupant indoor sources would be established. ASHRAE produces Standards and Guidelines that address test procedures for evaluating products, product specifications, and system operating performance.
The ventilation rates in this table are derived from physiological considerations, subjective evaluations, and professional judgements. The foreword of the Standard states: First, the minimum outdoor air flow rate has changed from 2. Environmental Protection Agency Arthur E. The tabulated values of outdoor air requirements “prescribe supply rates of acceptable outdoor air required for acceptable indoor air quality. Gene Tucker ChairU. Perhaps it is most reasonable to expect ventilation to provide, as a minimum, that portion of indoor air quality control that relates to thermal comfort and sensory comfort from occupant odor.
Dixon, State 62–1989 Florida P. About Browse this Collection. Unfortunately, these numbers are sometimes used without a very broad understanding of 62–1989 and how it relates to indoor air quality.
Ninomura, State of Washington Francis J. Interact With This Report Here are some suggestions for what to do next. These values have been chosen to control C02 and other contaminants with an adequate margin of safety and to account for health variations among people, varied activity levels, and a ashraw amount of smoking. Grimsrud, University of Minnesota Shirley J. The Standard contains design procedures and guidelines for ventilation rates in “all indoor or enclosed spaces that people may oc- cupy, except where other applicable standards and requirements dictate larger amounts of ventilation than this standard.
Persily Should Standard 62 go beyond design and deal more explicitly with air quality management during all phases of the life of a building? Energy conservation was the primary driving force.
Interpretations for Standard 62-1999
A table of design values for this correction factor could be developed, similar to the table of such values in the European ventilation guidelines What responsibilities do I have when using this report? The Standard is reviewed every 5 years or less, and updated as needed ashraf incorporate new information or improve its usefulness to building designers and code officials.
With further development it could be a very useful design tool for evaluating trade-offs between increased ventilation, source management, and air cleaning as options for achieving occupant health and comfort. These issues are listed below along with the chairman of the subcommittee responsible for dealing with each issue: Increased ventilation for major non-occupant sources should be evaluated along with source control and air cleaning.
Daynard, Northeastern University Richard W.
ASHRAE Standard 62-1989: Energy, Cost, and Program Implications.
dtandard If so, its value would typically range from 0. Usage Statistics When was this report last used? It is unreasonable to expect ventilation, which acts primarily by dilution and displacement of indoor contaminants, to provide acceptable indoor air quality by itself.
Stanadrd procedure also describes how to evaluate whether outdoor air quality is acceptable for ventilation, allows for reduction of outdoor air quantities when recirculated air is treated by contaminant removal equipment, and establishes criteria for variable ventilation. Creation Date October 15, The alternative procedure allowed design engineers to use whatever amount of outdoor air they standad necessary if they could show that the levels of indoor ashgae contaminants were held below recommended limits.
Ventilation rates are tabulated for a wide range of residential, commercial, institutional, vehicular, and industrial spaces.
As more information becomes available on sources and their emissions, and the health and comfort effects of those emissions, use of this procedure may very well increase.
Standardretains the two procedures for ventilation design, the Ventilation Rate Procedure and the Indoor Air Quality Procedure.
This report is part of the collection entitled: To make the Indoor Air Quality Procedure practical, Standard 62 may have to list default values of emission factors for various sources based on the literatureand give examples of how to use the procedure to calculate total emissions and compare them with values of G. Furthermore, Standard 62 contains very staneard information on how to use this procedure.
Prototypical building ventilation rates were varied in five steps to estimate the impacts of outside air on building energy use.