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“Whole-home heat recovery systems... extract stale, moist air from any room with water use, such as bathrooms and kitchens, then extract the warmth from it to preheat the fresh air being brought back in. The fresh air is run through filters before being pumped into all living spaces in the home. It can also be used to help cool a home during warmer months. This type of system is expensive and requires good duct runs, but is very effective.” — Oliver Heath
Whole-home heat recovery systems... extract stale, moist air from any room with water use, such as bathrooms and kitchens, then extract the warmth from it to preheat the fresh air being brought back in. The fresh air is run through filters before being pumped into all living spaces in the home. It can also be used to help cool a home during warmer months. This type of system is expensive and requires good duct runs, but is very effective.