Hot dog?

At a 6500cfm flow rate?

Actually Aspen pads are better than anything synthetic I ever tried... cheap, and change them out every season.

I seem to recall you have a crawl space? Trivial (for some of us handy folk :-) to ground-mount a big-ass (*) cooler and run the duct under the house.

(*) I had a 6500cfm unit, first on the roof (of a ranch-style house), then I decided I didn't like looking at it, so I got clever and ground-mounted it. They come in a variety of sizes from around 500cfm up to 6500cfm (or larger for commercial applications). They're manufactured year-round in Phoenix... major sales in Arab countries and Australia :-) ...Jim Thompson

What's the gradient? At a 6% grade, the adiabatic lapse rate is about 1-3/4 degree F per mile. ;-)

It's been absolutely beautiful here for the past for or five days. It's in the high 80s to low 90s and dry, which is *not* normal here.

It's all a matter of brute force. I'd have no problem whipping up a several hundred watts generator, in fact I might have to design one soon anyhow :-)

We have a crawl space but it literally means crawl, very little space. Minor other problems: There's a thick layer of concrete over the floor everywhere, radiant heat pipes in there, porcelain tile on top, and there's a game room under the living room (where we'd need cooling) which is on slab.

From Roseville to S.F. it's next to nothing, except for a bunch of hills that need to be crossed at the end it's all flat.

Right. It's the ice-cold water off the coast that cools us off.

I experimentally determined that the delta-T with altitude, going up the western side of the Sierra, is about 1 deg F per 300 feet, right around KRW's number.

John

I remember my young days when I royally messed that up. Was tired, stopped the car which also seemed somewhat tired, pitched my tent, had a couple of brewskys, went to sleep. Woke up around 4:00am and almost froze my butt off.

The wee detail I had overlooked was a wee sign with the word "summit" on there. That also explained why the car had lost so much power. I never made that mistake again.

Yep. The dry adiabatic lapse rate is 5.5F/1000'.

Well, a swamp cooler is only supposed to be good for about a 20 degree drop in temperature. This guy is pretty small, so getting it to cool half a 1800 sf house isn't too bad!

I did have it just in my office, but I got too cold... 8-)

Charlie

A 20F drop is all we'd want. From 90-something to just below 80F would already be sufficient.

Maybe I should try one of those then :-)

On a dry Scottsdale day I could get 64°F outlet air... BRRRR! ...Jim Thompson

My measurement wasn't very good, using the 1000' increment altitude signs and the car thermometer and math in my head. The wind is usually from the west, and it's not dry, which may complicate things. The record annual snowfall, which happens just before the crest, was something over 800 inches in, I think, 1937.

John

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If it's not foggy, it's "dry". ;-)

The dry adiabatic lapse rate fails when there's condensation because the air is no longer close to an "ideal gas" (energy is pulled out of the air for the phase change). If there's condensation the "wet" adiabatic lapse rate applies (~2.7F/1000').

But, the most important thing is that they have a sump of dry air to work from. right now, I am basically using my entire living/dining/kitchen area as the dry (and very warm!) area, and then directing the cool air down a hallway to the rest of the house. When I was just cooling my office, I had it in the bathroom door (a waterproof floor is a good idea!) so the whole rest of the house was my dry area.

Lots of folks buy these, and are disappointed, because they try sealing them into a room. After the room has reached high humidity, the cooling stops, and you get high heat AND humidity! ;-)

Charlie

Life is simpler here. We just leave the heat on all year.

John

So do we. Sometimes we heat the inside of the house and sometimes the outside.

Yep. We'd put it on the inside of the kitchen slider door with just the screen between it and the outdoors. There's tile so some water will be ok.