Are you paying to heat the Great Outdoors? Exhaust the air but not your budget! Multi-Family Apartment Building Heat Recovery for Make Up Air enercase24/7 savings throughout the heating season London & Middlesex Housing Corporation has found a rooftop energy savings ally — Heat Recovery on the Make Up Air. The technology extracts heat from the exhaust air stream and uses it to pre-heat incoming air. The result: fresh air at the quantity

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