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HVAC
BPI Heating Professional
Energy Efficiency
Vérification des connaissances
Energy Efficiency
Vérification des connaissances
Vérification des connaissances
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In a dual-fuel system (heat pump plus gas furnace), what determines the switchover temperature between heat pump and gas furnace operation?
A
Always 17 F - the AHRI low-temperature heat pump test condition
B
The outdoor temperature where running the gas furnace becomes more cost-effective than the heat pump based on energy prices and heat pump COP
C
Always 32 F - the freezing point of water when frost forms on the heat pump
D
The minimum outdoor temperature rating printed on the heat pump nameplate
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