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An ECM is a fan motor typically found in high efficiency furnaces.

An ECM (Electronically Commutated Motor) is a fan motor typically found in high efficiency furnaces. They may also be called variable speed motors or brushless DC motors. ECMs typically use 30% less electricity than a conventional furnace fan. Keep in mind that just because a furnace has a 90%+ AFUE rating does not necessarily mean it has an ECM. Conversely, just because a furnace has an ECM does not necessarily mean it is 90%+ AFUE.

Check out these heating and cooling fact sheets on the Focus on Energy Web site for more information on energy efficient heating equipment.

Published Thursday, April 16, 2009