WHAT IS AN AIR-TO-AIR HEAT EXCHANGER, HRV and ERV?
Air-change ventilation systems exist that take stale air out and bring in fresh air so as to not rely on cold air drafts for the entry of fresh air to the house. They are simply a box with two fans. In a few of the warm spots of Canada these are legitimate systems on their own. In most of Canada we have problems of distributing the very cold fresh air, and waste a lot of money throwing the hot air directly outdoors, so we have taken these air change systems a step further. An air-to-air heat exchanger, or what is more commonly called today a Heat Recovery Ventilator (HRV), is a air change central ventilation system that exhausts stale air outdoors and brings in an equal quantity of fresh air to replace it while stealing the heat from the outgoing air to warm up the incoming air. It automatically provides the proper air changes in the house for humidity and pollution control and frequently needs little or no pre-heating of the incoming cold fresh air. A recent addition to this family of
