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NC-2009 IEQp2:Environmental Tobacco Smoke (ETS) Control

Number of Units Required to be Sampled

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Abena Darden
Vice President
Thornton Tomasetti
LEEDuser Premium Member
188 thumbs up

We are working on a high-rise residential project in San Francisco. I see a question relating to how many residential units need to be blower door tested dating from June 24 2014. We do not see a reply to that question, however. The HERS 2.2 methodology states 1 in 7 units of the same layout, but we are hearing of more narrow sampling protocols. GBCI has not responded to our questions on this. We have not seen a specific addenda addressing this, either. We are hoping a fellow LEED User out there might have an example of successfully submitted and approved documentation they are willing to share with us. Many thanks in advance!

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Steve Loppnow
Sustainability Account Manager
Stok
LEEDuser Expert
177 thumbs up

Tue, 02/24/2015 - 22:09

Refer to LEED Interpretations #1740, 5209 and 10222. 1 in 7 seven is the correct sampling rate. I don't have first hand experience with this for IEQp2 so hopefully the interpretations help. LEED does reference the HERS sampling methodology.
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Tamara Quiroz
Architect
Efizity
LEEDuser Basic Member
0 thumbs up

Tue, 03/17/2015 - 13:32

In reference to the question about number of units required to be sampled we would like to have a response to an applied case (as an example). This is a multifamily residential building with natural ventilation where smoking is permitted only in residential units. This building has 3 types (A, B and C) of units which are identical. There are 35 A type units, 21 B type units and 7 C type units. The total of units in the building are 63. According to HOME ENERGY RATING SYSTEMS (HERS) FIELD VERIFICATION AND DIAGNOSTIC TESTING REGULATIONS and the LEED Interpretations #10222 and #1740, it is allowed to sample 1 in 7 identical units, but also a minimum of 3 tests are allowed when you have more than 21 units of one type. In the example, we understand therefore, that we need to make: Type A (35 units): 3 initial field verification, 3 sample field verification, 3 re-sample test (if necessary) Type B (21 units): 3 initial field verification, 3 sample field verification, 3 re-sample test (if necessary) Type C (7 units): 1 initial field verification, 1 sample field verification, 1 re-sample test (if necessary) Total: 21 tests Is this ok?

Thu, 12/24/2020 - 19:57

Refer to LEED Interpretations #1740, 5209 and 10222. 1 in 7 seven is the correct sampling rate. I don't have first hand experience with this for IEQp2 so hopefully the interpretations help. LEED does reference the HERS sampling methodology.

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