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A building's heating and cooling load can be lowered by recovering energy to and from the building exhaust air with an energy recovery exchanger. This energy exchange comes with an energy cost, static pressure loss across the exchanger that can add to the power required both by the fans supplying conditioned air to the space and the fans exhausting air. The author asks, added fan power can be significant but is the cooling or heating recovered really worth it?

Citation: ASHRAE Journal, vol. 56, no. 5, May 2014