Re: auto reversing window fans based on external temperature?

In article <3922f616-7ef5-4d0e-84ed-a4085bc7050e@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>, markm75 <markm75c@xxxxxxx> wrote:
Do they make any window fans that can be electronically reversed, like
this one:

http://www.amazon.com/Honeywell-HW-628-Twin-Window-Fan/dp/B0000CGQYA

Where, if the outside temp hit a certain temperature, it could reverse
and blow the cooler air into the room, or if it were hotter outside,
it would go in the direction to suck hot air out of a room to the
outside?


They would never make something like that, mainly because the inthernal thermostat
would not be able to detect it. It could be done with a separate controller. First you need a
reversing motor, then attach relays to switch direction controlled by the controller.

greg
.

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