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mini-split low-temp performance?
is the performance of a mini-split heat pump at low temperatures determined primarily by the outdoor unit? for example, if I install four 9k BTU indoor units with a 36k BTU outdoor unit, will it's heating capacity drop off faster at low temperatures than a 40k BTU outdoor unit with the same indoor units? leaving efficiency out of it, would that larger unit inherently be able to output more heat at some low temperature like 10F/-12C?