Re: GBlist: Demand controlled ventilation

Russ Smith (hysave@fta.com)
Thu, 27 Mar 1997 12:42:33 -0800

Marc J. Rosenbaum wrote:
>
> Does anyone have experience with demand-controlled ventilation in
> commercial/institutional buildings? I am working on a classroom building for a
> law school. The occupancy of a classroom can vary widely so we are considering
> DCV. I have heard CO2 sensors need frequent recalibration - if so, not a good
> strategy for a small institution, where the maintenance people tend to fight
> fires rather than leisurely take care of routine maintenance. What other means
> are there to determine how many people are in the space? Does anyone have real
> building experience here?
>
> Marc Rosenbaum

Hello again Marc,

The following is provided by our distributor in South Florida who works
with these things on a daily basis.

Good luck with your quest.

Russ Smith
Hy Save Inc. http://www.hysave.com


Wed, 26 Mar 1997 20:57:51 -0500 (EST)
From:
SLGHVAC@aol.com

Vaisala makes duct and wall mounted CO2 sensors that are very accurate
and
offer fast response time. The wall mount m/n is GMW 120, duct mount m/n
is
GMD 120. These sensors are made for DCV. Vaisala is a national company
that
specializes in dewpoint, rh and CO2 sensors. Their phone number is
617-933-4500.

Another option is to use occupancy sensors that will automatically open
an
outside air damper when people are sensed in a space. This is not
nearly as
effective as DCV, but it is an option.

Hope this is of some help.

Scott
__________________________________________________________________
This greenbuilding dialogue is sponsored by Oikos (www.oikos.com)
and Environmental Building News (www.ebuild.com). For instructions
send e-mail to greenbuilding-request@crest.org.
__________________________________________________________________