Heat Recovery Ventilators (HRVs) are designed to operate as an integral part of a total HVAC system while improving the homeowner’s indoor air quality. The HRV exhausts stale indoor air to the outside and fresh air is drawn from outside and delivered into the home. The heat exchange core transfers heat energy to and from the incoming and outgoing air. Excess wintertime humidity and contaminants are flushed from the house. Different levels of HRV’s are available to provide you with all your needs.