| efficiency |
The rate at which a furnace maximizes fuel use. This rate is numerically described as a ratio called AFUE (see AFUE). As of January, 1992, no furnaces can be manufactured with efficiencies lower than 78 percent AFUE. High-efficiency furnaces will be rated 88 to 97 percent AFUE. See also SEER and HSPF for efficiency ratings for heat pump systems.
출처: www.dom.com/customer/efficiency/res/answers/glossa...
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