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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ASHRAE Standard 62-1989: Energy, Cost, and Program Implications.
The revised version of that Standard, StandardVentilation for Acceptable Indoor Air Quality, recommended air flow rates for smoking-permitted and smoking- prohibited conditions in most spaces.
The Indoor Air Quality Procedure was originally developed to determine how much ventilation might be reduced below the rates specified by the Ventilation Rate Procedure. Sherber How should ventilation effectiveness be defined and incorporated into the standard?
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. Health-based criteria and guidelines are listed for the following contaminants: This standard is being continually reviewed and updated to reflect new information, especially on public health aspects of indoor air and sources of indoor contaminants. Under those guidelines, three design levels are offered for perceived indoor air quality which is similar to sensory comfort, as used in this paper.
Standards for Natural and Mechanical Ventilation. The foreword of the Standard states: Building designers use the Ventilation Rate Procedure in the vast majority of cases because it is relatively straightforward.
Guidelines for Ventilation Staandard in Buildings. If so, its value would typically range from 0. Energy, Cost, and Program Implications.
The alternative procedure allowed design engineers to use whatever amount of outdoor air they deemed necessary if they could show that the levels of indoor air contaminants were held below recommended limits. More information about this report can be viewed below. Showing of 59 pages in this report. At present, such information is seldom available to the designer, and is often unaffordable to the builder.
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Interpretations for Standard 62-1989
Perhaps a useful form of such information would be tables of maximum emission rates from non-occupant indoor sources, for the various contaminants or source emission mixtures of concern. Its state-of-knowledge guidance is the best available basis for ventilation system requirements in mechanical sections of building codes for North America. Options for control of contaminants from sources other than occupants might best be evaluated by a more fully developed version of the Indoor Air Quality Procedure.
This procedure also describes how to evaluate whether outdoor air quality is acceptable for ventilation, allows for reduction 62-1899 outdoor air quantities when recirculated air is treated by contaminant removal equipment, and establishes criteria for variable ventilation.
An appendix, which is not considered a part of the Standard, contains a compilation of criteria and ztandard for a broader range of contaminants. Description Last Updated Jan. Persily Should Standard 62 go beyond design and deal more explicitly with air quality management during all phases of the life of a building?
ASHRAE Standard Ventilation for Acceptable Indoor Air Quality
Descriptive information to help identify this report. ASHRAE produces Standards and Guidelines that address test procedures for evaluating products, product specifications, and system operating performance. Unique identifying numbers for this report in the Digital Library or other systems.
Samet How can the roles of source control and air cleaning be better integrated into the Standard? Digital Stanadrd 59 image files available in multiple sizes 1 file.
A table of design values ashtae this correction factor could be developed, similar to the table of such values in the European ventilation guidelines Who People and organizations associated with either the creation of this report or its content.
Consensus on acceptable concentrations is available for only a very limited number of contaminants, and there are very limited data on emission rates of contaminants from sources. Perhaps it is most reasonable to expect ventilation to provide, as a 62-189, that portion of indoor air quality control that relates to thermal comfort and sensory comfort from occupant odor.
Other additions provide opportunities for energy conservation. Daynard, Northeastern University Richard W. The Standard is reviewed every 5 years or less, and updated as needed to incorporate new information or improve its usefulness to building designers and code officials. The Ventilation Rate Procedure might therefore be best suited to supplying effective ventilation for control of occupant odor, thermal comfort, moisture from high-moisture areas such as kitchens and bathrooms, and conditions that discourage the growth and dispersion of microbial contaminants.
Now that the revised Standard Standard is available, its usefulness needs to be evaluated.