[Equest-users] infiltration rate

[Nick Caton]

For an "old townhouse," I think you may want to reference the ASHRAE fundamentals table for residential constructions (Fundamentals 2001, Ch28, Table 7)...  they surveyed a bunch of homes that were up to a few decades old to come up with a table that shows varying ACH rates, for "tight" to "loose" construction, varying with the OADT.  The tightest value given is 0.41.  Again this isn't a standard but rather based on real-world measurements.

A very good (and long) discussion thread is in the equest-users archives discussing alternate infiltration resources as well:  thread title was "Basic stuff - Infiltration"

~Nick

[cid:489575314 at 22072009-0ABB]

NICK CATON, P.E.
SENIOR ENGINEER

Smith & Boucher Engineers
25501 west valley parkway, suite 200
olathe, ks 66061
direct 913.344.0036
fax 913.345.0617
www.smithboucher.com

From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of CleanTech Analytics
Sent: Tuesday, April 24, 2012 2:32 AM
To: xiaoyang shi
Cc: equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] infiltration rate

.35 ACH is the BPI standard, any tighter and mechanical ventilation is required..

Jeremiah D. Crossett
CleanTech Analytics
503-688-8951
www.cleantechanalytics.com<http://www.cleantechanalytics.com>

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On Mon, Apr 23, 2012 at 11:54 PM, xiaoyang shi <xs2144 at gmail.com<mailto:xs2144 at gmail.com>> wrote:
Hi guys,

Could I ask what is the about infiltration rate of old townhouse in NYC? Where could I find the standard?

0.2cfm/ft2? Is it correct?

Thanks

Yang

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