Operational implementation of these requirements can have a sizeable influence on energy usage when applied improperly or incompletely. (ASHRAE) Standard 62.1-2004, ventilation for acceptable indoor air quality (IAQ) in Commercial, Institutional, Industrial, and High rise residential buildings, as it impacts and is influenced by ventilation control requirements, methods, and equipment. This is a summary of American Society of Heating and Refrigeration and Air-Conditioning Engineers, Inc. Design recommendations offered are intended to increase the potential for both predictable compliance and the flexibility to accommodate future changes while providing the greatest control reliability with the most energy-efficient methods. Because of the rate-based nature of both procedures allowed for compliance, this analysis focuses on the practical needs of reliable intake rate control and the risks of indirect controls. (ASHRAE) Standard 62.1-2004 is a short but often misunderstood document outlining ventilation requirements intended to provide acceptable indoor air quality (IAQ) for new buildings or those with major renovations. This proposed change is intended to improve the IAQP by requiring consideration of these additive effects that are well established in the literature for many organ systems, according to Hedrick.American National Standards Institute (ANSI)/American Society of Heating and Refrigeration and Air-Conditioning Engineers, Inc. This “additive” effect is already implicit in the Ventilation Rate Procedure. The proposed addendum would add requirements to the Indoor Air Quality Procedure (IAQP) for determining minimum ventilation rates which require consideration of the combined effects of multiple contaminants of concern on individual organ systems. These rates include a “People Outdoor Air Rate, Rp” which will require ventilation during periods of expected occupancy, but do not include an “Area Outdoor Air Rate, Ra” which will allow the ventilation rate to be zero for refrigerated warehouses with no occupants.Īlso, addendum j is open for public review until May 7. Addendum l adds a refrigerated warehouse space type to Table 6-1, providing revised ventilation rates for these spaces.The exception defines several criteria which the airstream must meet before such heat recovery can be used, and the heat recovery system must limit recirculation airflow to less than 0.5 percent of the outdoor air intake flow. Addendum k adds an exception to the recirculation limits on Class 4 exhaust airstreams from laboratory hoods which would allow use of heat wheel energy recovery in some cases.This proposed addendum replaces both of these space types with “Gym, Sports Arena (play area)”, with Rp = 20 cfm/person and Ra = 0.06 cfm/ft 2 and assigns this new space type with an air class of 2 rather than class 1 from the first publication public review version. Users of the standard have expressed interest in applying demand controlled ventilation to these space types, which is effectively prohibited by the lack of a per person component to the ventilation rate. Addendum h – Table 6-1, includes ventilation rates for “Sports arena (play area)” and “Gym, stadium (play area).” Both space types have ventilation rates based on floor area only, the per person rate is zero.In addition to addenda f and i, three more addenda are open for public review until April 22. The addendum is open for an advisory public review, meaning comments received allow for constructive input and need not be resolved or formally acted on by the project committee. The Standard 62.1 committee is interested in the appropriateness of the relative humidity limit and the climate zones where the requirement applies. Recent studies have shown that excessively low humidity may result in unacceptable indoor air quality. Also open for review is addendum i, which would add limits for low humidity.
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