A heat recovery ventilator (HRV) provides fresh air that your home,office,etc. may need to improve its
indoor air quality (IAQ) when it’s tightly closed. HRVs pull out stale indoor air and replace it with fresh
outdoor air without driving up your heating costs by transferring the energy on the stale air to fresh air.
In addition to this procedure ,TEVHR-AC units can supply fresh air at desired temperatures without
bringing any cooling or heating load to AC system of the building thanks to heat pump fuction of the unit.