Quite honestly, I would come home and crawl under a pile of quilts on my sofa and never get anything done for four or five months if I turned my thermostat down to an utterly inhumane 60 degrees, or even for that matter, 68. I think this is equivalent to torture.

On the other hand, air conditioning set at 79? Why on earth do you need air conditioning AT ALL unless you live in a place like Houston or Phoenix. I live in Cleveland, ohio and I'm fine with anything in the 80s -- I live in a nicely ventilated old house -- and even in the 90s if it's not more than a week or two, which it rarely is. I have a room air conditioner and it's been sitting on the porch for six years. I've just never installed it.