[Greenbuilding] [BULK] HRVs

[Lawrence Lile]

>In any case, an HRV doesn't typically pull the amount of air that a
hood 
(especially commercial) is likely to, perhaps 100 cfm vs. 500+ cfm.


Here is a manufacturer right here in good ol' Columbia Mo, my Alma
Mater, that makes HRV systems up to 78,000 CFM. That's enough fresh air
to accommodate 5000 of your closest friends at 15 cfm per person, which
will probably take care of your next dinner party quite handily.  If you
want one bigger, I am sure they could twin a few systems together for
you.  I was recently in their facility and they were showing off their
own system, which a tall guy could easily walk in.  the heat wheel was
spinning away, and zero degree air can come in the intake, while it is
producing plenty of 72 degree air at the outlet.  It was pretty
impressive.  Our mechanical department is designing these things into
theatres, commercial buildings, and all kinds of other applications, not
only do they save gobs of energy but they also can reduce the size of
mechanical equipment enough to pay for themselves.  The ability to bring
in plenty of fresh air at minimal energy cost "Greens" up a building
quite nicely, improving indoor air quality immensely.  

http://semcoinc.com/products/energyrecovery/

Lawrence Lile, PE, LEED AP
Project Solutions Engineering

-----Original Message-----
From: Keith Winston [mailto:keith at earthsunenergy.com] 
Sent: Thursday, November 29, 2007 10:50 AM
To: Lawrence Lile
Cc: greenbuilding at listserv.repp.org
Subject: Re: [Greenbuilding] [BULK] HRVs

Typically HRV's and ERV's are not used for kitchen stove exhaust for 
just this reason. I'm not sure it's a safety issue so much as a "life of

your HRV" issue.

In any case, an HRV doesn't typically pull the amount of air that a hood

(especially commercial) is likely to, perhaps 100 cfm vs. 500+ cfm.

Keith


Lawrence Lile wrote:
>> 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
>
>
> _______________________________________________
> Greenbuilding email list
>      Environmentally-preferable design, construction, building
elements
> List info:
>
http://listserv.repp.org/mailman/listinfo/greenbuilding_listserv.repp.or
> g
> List email: Greenbuilding at listserv.repp.org
> Managed by BuildingGreen, Inc. http://www.buildinggreen.com
>       publisher of Environmental Building News and GreenSpec
> Hosted and archived by REPP / CREST http://www.crest.org
> To get on the list:
>  
>
http://listserv.repp.org/mailman/listinfo/greenbuilding_listserv.repp.or
> g
>   or
mailto:greenbuilding-request at listserv.repp.org?subject=unsubscribe
> To get off the list:
>  
>
http://listserv.repp.org/mailman/listinfo/greenbuilding_listserv.repp.or
> g
>   or
mailto:greenbuilding-request at listserv.repp.org?subject=unsubscribe
>
> _______________________________________________
> Greenbuilding email list
>      Environmentally-preferable design, construction, building
elements
> List info:
http://listserv.repp.org/mailman/listinfo/greenbuilding_listserv.repp.or
g
> List email: Greenbuilding at listserv.repp.org
> Managed by BuildingGreen, Inc. http://www.buildinggreen.com
>       publisher of Environmental Building News and GreenSpec
> Hosted and archived by REPP / CREST http://www.crest.org
> To get on the list:
>
http://listserv.repp.org/mailman/listinfo/greenbuilding_listserv.repp.or
g
>   or
mailto:greenbuilding-request at listserv.repp.org?subject=unsubscribe
> To get off the list:
>
http://listserv.repp.org/mailman/listinfo/greenbuilding_listserv.repp.or
g
>   or
mailto:greenbuilding-request at listserv.repp.org?subject=unsubscribe
>
>