Hi, I was wondering if the v2.2 option (HERS methodology) would still apply for v2009 in regards to the blower door test and number of units that must be tested. I read once that you could test only 1 in 7 similar units (same layout). My project is both a hotel and residential building, and there are different types of apartments and hotel rooms which are obviously repeated throughout the building. Just as an example, if I had 3 different types of hotel rooms with 10 units each, I would have to test only a total of six units. Can we still do this and comply with the prerequisite requirements? If anyone can come up with the official source of this info I recall I'd be glad to hear it. Thank you.

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Sam Stoltze

Sustainability Consultant

Chapman Construction / Design

LEEDuser Basic Member

0 thumbs up

Mon, 11/10/2014 - 16:34

In the LEED Reference Guide For Green Building Design and Construction, the IEQp2 - NC & CS - the Residential and Hospitality section states "Demonstrate acceptable sealing of residential units by a blower door test conducted in accordance with ANSI/ASTM-E779-03, Standard Test Method for Determining Air Leakage Rate By Fan Pressurization." (pg 416) This is likely the source that you are looking for, although I cannot be sure without purchasing the PDF. http://www.astm.org/DATABASE.CART/HISTORICAL/E779-03.htm

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Blower door test for 1 in 7 of each room model

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