A good circulating-type heater is only about one-third as efficient as a working fireplace.

Question

Quizplus · Accepted Answer

A working fireplace is notoriously inefficient in terms of heat output, typically losing about 90% of the generated heat up the chimney. A circulating heater, on the other hand, is designed to distribute heat more evenly throughout a room or space. Therefore, a good circulating heater is generally much more efficient than a working fireplace.

A Good Circulating-Type Heater Is Only About One-Third as Efficient