This article was originally published in the May/June 1999 issue of Home Energy Magazine. Some formatting inconsistencies may be evident in older archive content.


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Home Energy Magazine Online May/June 1999

in energy

New ASHRAE Ventilation Standard

Ventilation in the housing stock accounts for one-third to one-half of the space conditioning load, primarily through uncontrolled air leakage. Major energy savings can result from reducing air leakage, but envelope tightening changes sometimes run the risk of causing indoor air quality problems. To reduce this risk, the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) has proposed a new ventilation standard for maintaining indoor air quality in residential buildings. The proposed standard, 62.2P, is expected to be available for public review and comment beginning May 1.

The proposed standard addresses three main issues: whole-house ventilation, local exhaust, and source control. Because there are different ways to achieve specified ventilation rates, the standards were designed to allow users flexibility in employing either natural or mechanical methods where appropriate. For example, while the standard allows for infiltration and occupant use of windows to meet minimum ventilation requirements in some climates, in areas with more severe climates and in houses with barriers to the use of windows, mechanical ventilation is required. Sound and flow rates for fans are also stipulated in the proposed requirements.

To read the full details on the proposed standard, visit ASHRAE's Web site at Instructions for filing comments on the standard can also be found there. Look for a discussion of the standard's development and implications in the May 1999 issue of the ASHRAE Journal.

--Mary James



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