The heat recovery ventilator (HRV) is the proper choice in colder climates where there is excessive humidity during the heating season. An HRV keeps the home supplied with a steady flow of fresh outdoor air. As stale, warm air is expelled, the heat recovery core warms the incoming fresh, colder air before it is distributed throughout the home. The result is a constant supply of fresh air and and greater home comfort.
An air exchanger just does that – it exchanges the warm stale air in your home with fresh cold air from the outside and there is no heat recovery meaning that when this cold air comes into your home, your heating system will have to work harder to heat it.