Viewing profile — heatpumpfan

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It is not clear why your heat pump cuts over at 40 degrees if it still has COP of 2 at 8 degrees. Presumably a cost-effectiveness calculation if gas is cheap in your area. If you h…

Are you able to say more about that? "We will have local contractors" sounds great but in my area I don't think you will be able to find anyone to work with you. The local contract…

You have an older system. New systems can provide 100% rated capacity well below freezing. Mine is -5F and not specifically a "cold climate" unit. The unit in OP seems to offer 100…

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Sizing heat pumps by the sq. ft. is hairy reasoning. Load calculations take into account climate zone, insulation, building materials, orientation, ceiling height, etc. Any recomme…

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Refrigerant, pressure, vapor injection, and a highly "managed" vapor compression cycle.

"Cold climate" air source pumps have been available for years. Even my cheap MrCool Universal has 100% output down to -5F and it is not even really a "cold climate" heat pump.

>"backup heating strips" Big resistive elements sitting in the air handler. Think big toaster oven coils that are used when the outdoor temperature drops too low for the heat pump …

I recently purchased and installed a 3 ton MrCool Universal (Gree Flexx, I believe) with lineset for ~$4K shipped: https://hvacdirect.com/mrcool-universal-36-000-btu-heat-pump... W…