ASHRAE'S RESIDENTIAL VENTILATION STANDARD: EXEGESIS OF PROPOSED STANDARD 62.2 M.H. Sherman1, Ph.D. Fellow ASHRAE Indoor Environment Department2 Environmental Energy Technologies Division Lawrence Berkeley National Laboratory Berkeley, CA 94720
In June 2000 ASHRAE's Standard Project Committee on "Ventilation and Acceptable Indoor Air Quality in Low-Rise ResidentialBuildings", SPC 62.2P, recommended and the Board of Directors approved ASHRAE's first complete standard on residential ventilation for public review. The standard is an attempt by the Society to address concerns over indoor air quality in dwellings and to set minimum requirements that would allow for indoor air quality and energy efficiency measures to be evaluated. The standard has requirementsfor whole-house ventilation, local exhaust ventilation, and source control. In addition to code-intended requirements, the standard also contains guidance information for the designer and/or user of the standard. This report summarizes the public review draft and attempts to address questions and concerns that those potentially affected by the standard might have. This report may also be of use tothose considering public review comments on the proposed standard. Introduction Because of the effects it has on health, comfort, and serviceability, indoor air quality in our homes is becoming of increasing concern to many people. According to the American Lung Association elements within our homes have been increasingly recognized as threats to our respiratory health. The EnvironmentalProtection Agency lists poor indoor air quality as the forth largest environmental threat to our country. Asthma is leading serious chronic illness of children in the U.S. moisture-related construction defects and damage are on the increase in new houses. Minimum residential ventilation can improve many of these indoor air quality problems.
Max Sherman is a Senior Scientist at LBNL and the groupleader of its Energy Performance of Buildings Group as well as the an ASHRAE Fellow and Chairman of ASHRAE Standard Project Committee 62.2P on Residential Ventilation and Acceptable Indoor Air Quality. 2 This work was supported by the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Building Technology of the U.S. Department of Energy under contract No. DE-AC03-76SF00098ASHRAE's Role ASHRAE has long been in the business of ventilation, but most of the focus of that effort has been in the area of commercial and institutional buildings. Residential ventilation was traditionally not a major concern because it was felt that between operable windows and envelope leakage, people were getting enough air. In the quarter of a century since the first oil shock, houses havegotten much more energy efficient. At the same time, the kinds of materials and functions in houses were changing in character in response to peoples needs. People were also becoming more environmentally conscious not only about the resources they were consuming but about the environment in which they lived.
All of these factors contributed to an increasing level of public concern aboutresidential indoor air quality and ventilation. Where once there was an easy feeling about the residential indoor environment, there is now a desire to define levels of acceptability and performance. Many institutions both public and private, have interests in Indoor Air Quality (IAQ), but ASHRAE, as the professional society that has had ventilation as part of its mission for over 100 years, was thelogical place to develop a consensus standard. That standard is now ready for its first public review.
ASHRAE Standard 62.2P, "Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings" defines the roles of and minimum requirements for mechanical and natural ventilation systems and the building envelope intended to provide acceptable indoor air quality. It applies to spaces...