Attic Heat Recovery System

A heat recovery system works also called hrv or mvhr via a heat recovery ventilation unit which is usually located in the attic roof space or plant room of a building.

Attic heat recovery system.

Heat recovery ventilators reclaim energy from exhausted stale indoor air to temper incoming fresh air heat is retained during cooler seasons and removed during warmer seasons. One of the most visible and perhaps even iconic features of a super energy efficient home is the heat recovery ventilator hrv. In a nutshell warmspring is basically the combination of an attic ventilation fan with a compact air to water heat exchanger. The goal was to rid the house of its stale moist air while keeping as much of that air s heat as possible.

Intake vents located at the lowest part of the roof under the eaves allow cool. A strong ventilation system was the answer and its secret weapon was a heat recovery ventilator aka an air to air heat exchanger. The result is better indoor air quality and lower energy use than in standard homes. The reason to use ventilation system with heat recovery is so you minimize heat gain or loss so putting it into unconditioned space kind of defeats the purpose.

These systems capture about 70 percent of the energy already expended to temper incoming air. If you put this system in unconditioned space say a vented attic the outdoor air being delivered to the house will pick up or lose heat on its way. The patent pending warmspring attic heat recovery system takes a more practical approach to exploiting low grade heat from a seasonally hot attic.