Service & Troubleshooting第 83 / 110 题
HSPF (or HSPF2) rates the seasonal efficiency of what?
a.A gas furnace
b.A heat pump in heating mode
c.An evaporative cooler
d.A duct booster fan
解析
Heating Seasonal Performance Factor rates how efficiently a heat pump delivers heat over a heating season. A higher HSPF, or the updated HSPF2, means more heat per unit of electricity. It complements SEER, which rates the same unit's cooling efficiency.
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