Hi Hill. I had Solar Guys install a solar attic fan in my CYV. Although I don't have hard data, I am sure that the attic is cooler and thus not heating up the home as much so that the AC unit isn't working as hard. I should take a look at my past SECO bills cause I did go one whole year without the fan and can compare.
One thing I did do was to insulate my garage doors. In a CYV, the garage doors have no insulation and by putting in the foam panels, I really saw a reduction in temps during the sunny days.
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