[Greenbuilding] moveable insulation

[Doug Kalmer]

I doubt there are even a couple of ounces of water condensed on a window. 
There would be little condensation if I kept the insulated shades open, 
which would lose much more heat as the glass would be heated to near room 
temps. Thank you, Doug
----- Original Message ----- 
From: "Corwyn" <corwyn at midcoast.com>
To: "Doug Kalmer" <sunart at netease.net>
Cc: <greenbuilding at lists.bioenergylists.org>
Sent: Wednesday, November 17, 2010 11:01 AM
Subject: Re: [Greenbuilding] moveable insulation


> On 11/16/2010 9:27 AM, Doug Kalmer wrote:
>> ... so there is a considerable amount of condensation on cold
>> nights. This does show that the movable insulation is doing it's job,
>
> That condensation is releasing 970 BTUs of heat per pound of water to the 
> outside as it condenses.  In addition to the 1 BTU per degree of 
> temperature difference (per pound of water).  All of which needs to be 
> added to the convective heat loss from the air movement.
>
> You are using the energy in the house to power a heat cycle which is 
> pumping heat to the windows, and beyond.
>
>
> Thank You Kindly,
>
> Corwyn
>
> -- 
> Topher Belknap
> Green Fret Consulting
> Kermit didn't know the half of it...
> http://www.greenfret.com/
> topher at greenfret.com
> (207) 882-7652
>