Heat Pumps and Outdoor Design Temperature
What happens in cold climates during the 88 hrs of year when temps fall below outdoor design temp? Do heat pumps keep working but indoor temp fails to reach desired level? We like indoor temp 75 F 100% of time. When outdoor temp falls below our community’s design temp of one degree F, how warm will we be able to keep inside of house using mitsubishi hyper heat pumps alone? Will we need space heaters (eg, radiant ceiling panels, cadet heaters) in addition to pumps? I know 88 hrs are a small fraction of the year, but who wants to shiver for 3.5 days?! What do you GBA readers do to keep warm?
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