Re: GBlist: Dustmites

Loren Abraham (loren@cstone.net)
Fri, 28 Feb 1997 02:45:30 -0500

While I don't disagree with the logic of your technical explanation of
drying potential in VA vs. NH, I do disagree with your conclusion. That
being that someone living in VA shouldn't need a humidifier since you don't
use one in NH.

----------
> From: Marc.J.Rosenbaum@valley.net (Marc J. Rosenbaum)
> To: greenbuilding@crest.org
> Subject: Re: GBlist: Dustmites
> Date: 27 Feb 97 13:27:56 EST
>

> So I stand by my earlier comment. Because Virginia is substantially
warmer
> than NH, the outdoor air holds more moisture as it leaks into the home.
> Burlington VT and Richmond VA have the same average relative humidity in
> January - 68%. But Burlington average January temperature is 16F,
Richmond is
> 36F. So absolute humidity in Virginia is 21.1 grains/pound, in Vermont
8.3
> grains/pound. Indoor air at 70F and 35% relative humidity is 38.1
> grains/pound. So for a home of a given leakage rate, the air is almost
twice
> as "drying" in VT than it is in VA (drying potential being determined by
the
> difference in indoor air moisture content and outdoor air moisture
content.)

__________________________________________________________________
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.
__________________________________________________________________