Dec. 9th, 2010

So I stumbled upon this reminder of Norumbega, now a little district around the shore of the Charles in Watertown and Newton, later a park and an amusement park, now what's left being a canoe rental facility...

I was doing a web search for Everett Hale, the distributor who has the CA/AZ rights for the new Air2O two-stage evaporative cooler unit. This name is a hallowed Old New England name, Edward Everett Hale being the most famous of the family, and since he grew up in Weston, he's probably a relation.

So I got hold of the Oasys people finally. The company had a promising cooler but failed in the market -- lack of capital to market the product, most likely. The Speakman company (famous for shower heads; we had one of theirs in Sunnyvale) bought them out and they're taking another run at it. They have a new unit (the Air2O) which is designed more for roof installs (see the glossy folder), and are about a year away from an integrated evap/AC/heating package which would encapsulate the control issues for residential use.

The control issues are these: air flow for evaporative cooling is from exterior, cool, blow around interior, escape through vents or windows. Air flow for AC is closed: air is returned, cooled again, and recirculated. At other times, what is wanted is simple ventilation - rapid replacement of warm indoor air with cool outdoor air, or vice-versa. The system needs to know inside and outside temp and humidity, and can do a little bit better if it has a good forecast of future numbers. There are fans, vents, and air valves to be operated.

Now the non-casita part of our house is about 5400 sq ft, and Speakman/Oasys says one unit can handle 2500 sq ft, so with AC backup we may get by with two units. Installation on the roof may not be too difficult, near the current two AC units up there. Everett says they can get a few beta units in immediately if we can find a competent installer -- they have none in the area.

Remember, the pioneers are the guys with the arrows sticking out of their backs.....

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drscott

November 2013

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