On Oct 6, 7:38 pm, tom wrote:
On Oct 6, 7:18 pm, "DonC" wrote:



"Reed" wrote in message

...

DonC wrote:
Hi all,

In every house I've owned, until now, I've installed a whole-house fan.
They significantly reduce AC costs and make for comfortable living.
Alas, that was while I lived in Michigan in houses that had attics. My
typical unit included a twist timer and variable speed motor.

Now we live in southeastern AZ in a condo with a flat built-up roof so a
typical attic unit won't work. But we still have frequent cool nights
that would we could benefit from.

Anybody here have any experience with WH fans in a similar setting? My
research so far has been disappointing -- no variable speed fans and
fewer available units : (

Thanks

Being in AZ I would consider a swamp (evaporative) cooler. A downdraft
model would easily install on a flat roof, and give you cooling when
needed, not just at night. I'll bet most of your neighbors have one, (or
A/C).

Yes we have AC. Some -- but closer to a "few" rather than most -- have
swamp coolers but they're simply a form of air cooling limited to about 20
degrees of cooling. When temperature get over 100, 20 degrees isn't enough.

But we're talking about a different animal here. A WH fan "moves" existing
cool air supplementing AC at a much, much cheaper cost.

A WH fan will move your conditioned air into the great outdoors, won't
it? Unless you're talking about a recirculating type fan, which you
already have on your AC. Nice weather we're having now, eh? Tom

Oops, just re-read your initial post, and will recommend the swamp
cooler. The blower will push cooler nighttime air just fine, and save
lotsa bucks over the AC during those in-between seasonal warm
spells . Tom