infiltration rate

5 posts / 0 new
Last post

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

xiaoyang shi's picture
Offline
Joined: 2011-09-30
Reputation: 0

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

*Jeremiah D. Crossett*

CleanTech Analytics's picture
Joined: 2012-02-09
Reputation: -1

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.

Nick-Caton's picture
Offline
Joined: 2011-09-30
Reputation: 605

When doing blower door tests I have found ACH 2 or 3 to be commonplace.

*Jeremiah D. Crossett*

CleanTech Analytics's picture
Joined: 2012-02-09
Reputation: -1

An HTML attachment was scrubbed...
URL:

Bruce Easterbrook's picture
Joined: 2011-09-30
Reputation: 0