When is it too cold to use a grill pump for home heat?
Answers: When water contained by your toilet bowl freezes. Seriously, I have hear that regions where the average winter heat falls below freezing is not a good place to use a grill pump.
With an average evaporator temperature of more or less 36F, heat pumps want outdoor temperatures above that within order to hold energy and verbs it indoors. Most systems revert to auxiliary heat, usually electric strip heaters, when it get below freezing. The bottom line; a HEAT PUMP get less well-run as the temperature drops and stops working at the freezing point.
If you live surrounded by an area that seldom go below freezing, heat pumps are commonly fine as long as you have some sort of supplemental bake for those rare knotty freezes. If you're in the snowbelt I'd try to have a word you out of installing a heatpump and go near some sort of fossil fuel as your primary heat source.
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