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So, if I can understand this correctly, a heat pump is not effective unless it is 60 F or above? Many of the information manuals i have been reading of various manufacturers indicated that if it has a defroster, it can heat down to 42-45 F (although less efficiently than when it is a higher...

Thanks, it seems like there is a wealth of knowledge here. I am not interested in solar, if for no other reason then I am dead set against putting holes in the roof. So, based on that premise, solar is out. I am looking for a little bump during the summer when there is an extended cold...

First off hello, newly joined up, but have been reading the site for awhile. My question is regarding using a heat pump in a cooler climate, specifically near Toronto, Canada. I have been reading extensively about this, and it seems like there is a great deal of conflicting information about...