Re: Passive cooling
From: Danny Milman (
Date: Tue, 6 May 2003 09:15:05 -0600 (MDT)

Pleasant Hill Cohousing also has 3 foot eaves, a radiant barrier on the
underside of the roof sheathing, metal roofs, thick light colored stucco
walls, 10" slabs on grade for thermal massing, and a lot of insulation
including perimeter insulation on the foundation and wet blown cellulose
insulation in the walls and ceiling for a total higher R value than is

And there's the pool for when it's really hot.


The CoHousing Company
1250 Addison Street #113
Berkeley CA  94702

510/549-2140 fax

> From: "Terri Hupfer" <gordita [at]>
> Reply-To: cohousing-l [at]
> Date: Mon, 5 May 2003 20:30:03 -0700
> To: <cohousing-l [at]>
> Subject: [C-L]_Passive cooling
> Here in Pleasant Hill we have a variety of passive cooling methods built in
> to avoid the need for central air. First is a metal reflective roof, then
> metalized insulation sheets under the roof, then 2 x 6's instead of 2 x 4's
> giving thicker walls and more insulation. Most of us have whole house fans,
> to blow off the hot air and suck in the cool at night. We have double-paned
> windows and many have double-celled mini blinds which we keep closed in the
> heat of the day. There might be a couple things I missed, but those are the
> major ones.
> I moved here from SF, where it's always cool. Chuck Durrett promised us it
> would work, but I was not a believer till I saw it in action. I came home to
> my house each summer day (days it was often 90-100) out here, to a house
> that was 75 degrees cool (felt like air con) downstairs, and at worst 80
> upstairs. Each night when it cooled off I ran my whole house fan for 1/2
> hour, and cooled the whole place down. There were only 2-3 nights the whole
> summer when I was too warm, and that could have been fixed by getting my
> ceiling fan up in the bedroom!
> Chuck claims this works in places as hot as Tucson. I almost believe him!
> Terri Hupfer
> Pleasant Hill Cohousing
> Contra Costa County (east of SF)
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