If it lowers the temperature of the garage by 15 degrees, it must also make a sizeable reduction in the cost to air condition the house.
When talking to one of the solar fan distributors, I asked him why should I pay so much more for a solar unit than a wired unit. He claimed that the cost to operate a wired unit was quite high and quoted me a figure (which I now forget) which would indicate that the solar unit would pay for itself in just a year or two. My gut tells me that his figures for operational costs for wired units were a bit exaggerated but I can't prove it.
One thing that I didn't like about the solar type that I was looking at was that it runs whenever the sun is shining (there was no thermostatic override). This means that in the winter when you may want the attic to be warmer to keep the house warm, you are still expelling the warm air all day long.
I will be looking into installing a wired unit when we get down there full time. Can anyone recommend someone who does this for a reasonable price?
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