Keywords:  stale, hrv, exhaust, fresh, preheat
This device bring fresh, outside air into a home while simultaneously exhausting stale indoor air outside. In the process of doing this, an HRV removes heat from the exhaust air and transfer it to the incoming air, pre-heating it. This allows for the reclamation of much of the energy that otherwise would simply be vented outside. The end result.
Exchanges stale indoor air for fresh outdoor air with minimal heat loss. In winter, warmth from the indoor air being vented out is transferred to the outside air being drawn in.
HVAC equipment that saves energy by using a heat exchanger to transfer heat from the building exhaust air to the cold ventilation air entering the building.