Source: http://www.thriftyfun.com/tf142151.tip.html

What is a Heat Recovery Ventilator?

A device that captures the heat from the exhaust air from a building and transfers it to the supply/fresh air entering the building to preheat the air and increase overall heating efficiency.

U.S. Department of Energy

Source: http://www.thriftyfun.com/tf142151.tip.html

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