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The 2008 Supplement to Standard 62.2-2007 is now available. The supplement includes ANSI/ASHRAE Addenda a, b, c, and k to ANSI/ASHRAE Standard 62.2-2007. [Please note this text is courtesy of ASHRAE.]
· ANSI/ASHRAE Addendum A to ANSI/ASHRAE Standard 62.2-2007, Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings
This change implements interpretation IC 62.2-2004-3. The language clarifies the section and makes it easier for users to apply an ANSI consensus standard method to meet the requirements of Section 6.5. No change is made to the actual requirements, which exist to limit the transport of contaminants from garages to occupiable spaces. Note: Please be aware that Addendum c to ANSI/ASHRAE Standard 62.2-2007 also makes changes to Section 6.5.
· ANSI/ASHRAE Addendum B to ANSI/ASHRAE Standard 62.2-2007, Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings
Standard 62.2 currently recognizes that it is possible to achieve equivalent indoor air quality (IAQ) through either continuous ventilation or an increased amount of ventilation provided intermittently. This addendum replaces the current requirements for calculating equivalent delivered ventilation for an intermittently operating system with more accurate factors. The impact of this addendum is to require smaller intermittent ventilation rates than the current standard for some operation schedules. One advantage of this change is to allow potential energy-saving strategies that would result in equivalent IAQ.
· ANSI/ASHRAE Addendum C to ANSI/ASHRAE Standard 62.2-2007, Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings
Attached garages commonly contain many potential contaminant sources, ranging from the storage of chemical products to the intermittent operation of automobiles. Standard 62.2 has long recognized that preventing the transport of these contaminants into residences is important but has provided limited detail on how to prevent such transport. This addendum modifies Section 6.5 of Standard 62.2-2007 to add specific requirements on separating the garage from adjoining occupiable space, such as requirements of sealing known potential areas of air leakage at joints and penetrations. Note: Please be aware that Addendum a to 62.2-2007 also makes changes to Section 6.5.
· ANSI/ASHRAE Addendum K to ANSI/ASHRAE Standard 62.2-2007, Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings
This addendum is a response to recent studies of window opening patterns in California (which covers much of the region described in the exception to Section 4.1(a) of Standard 62.2), which show that household residents open windows much less than expected. Window opening occurs primarily in response to thermal comfort issues rather than indoor contaminants. Therefore, window opening, which is assumed to provide the ventilation required in this exception in mild climates, should not be an acceptable alternative to the ventilation requirements in this standard. Addendum k to Standard 62.2 deletes Exception 4.1(a) from the standard.
Please click on the attachment below for the complete Addenda Supplement.
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