Comment Comment by Aloha I don't think your math adds up.Combined cycle is like at most 70% efficient, subtract 10% of distribution, you end up with 60%.At 50f my 5T heat pump takes 6.6 kWh to generate 50,000 BTU.6 kWh of energy takes 71cf of gas to make - accounting for transmission and generation losses.71cf of gas will make 71,000 BTU of heat, assuming an 80% efficiency furnace, that comes out to 56,000 BTU usable.Yes a heat pump will vastly outperform resistive strip heat - but not even an 80% gas furnace. parent Aloha 2 years ago
Combined cycle is like at most 70% efficient, subtract 10% of distribution, you end up with 60%.
At 50f my 5T heat pump takes 6.6 kWh to generate 50,000 BTU.
6 kWh of energy takes 71cf of gas to make - accounting for transmission and generation losses.
71cf of gas will make 71,000 BTU of heat, assuming an 80% efficiency furnace, that comes out to 56,000 BTU usable.
Yes a heat pump will vastly outperform resistive strip heat - but not even an 80% gas furnace.