[Greenbuilding] [BULK] HRVs

[Lawrence Lile]

>Is the HRV (vs a simpler exhaust fan) also de rigeur? HRVs seem useless

in most US homes, which naturally leak about 10 times more fresh air 
than required.

Perhaps an HRV would be useful in a tight home such as Rob's.  

I am wondering about using an HRV with grease-laden air from a kitchen
vent?  Is there a safety issue or a cleaning issue with this?  I'd have
the same question about dryer exhaust, laden with lint.  

How well does that metal filter that comes with the kitchen fans
mitigate this problem?  If this were a commercial installation, then
no-how no-way would any fire marshall allow kitchen exhaust to go
through an HRV.  A residential kitchen might not have the same grease
load, but I have noticed a gummy layer of stuff that will build up on
cabinets near the stove between cleanings in homes that use a lot of
frying.  

Lawrence Lile, PE, LEED AP
Project Solutions Engineering

-----Original Message-----
From: greenbuilding-bounces at listserv.repp.org
[mailto:greenbuilding-bounces at listserv.repp.org] On Behalf Of Nick Pine
Sent: Thursday, November 29, 2007 6:57 AM
To: greenbuilding at listserv.repp.org
Subject: [BULK] [Greenbuilding] HRVs
Importance: Low

 "Robert Tom" <ArchiLogic at yahoo.ca> writes:

>... I installed an exhaust vent in the ceiling at the opposite end of 
>the kitchen from the stove, that is ducted to the HRV, as is de rigeur.

Is the HRV (vs a simpler exhaust fan) also de rigeur? HRVs seem useless 
in most US homes, which naturally leak about 10 times more fresh air 
than required.

Nick


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