Most homes built within the last 15 years are so tightly insulated that very little fresh air can enter and little stale air can exit.
This means that VOCs (volatile organic compounds given off by carpet, plywood, etc.), household chemicals smoke, radon, and odors have no way to escape, resulting in indoor air that can be 10 times worse than the smoggiest city. (Source: EPA)
A properly sized Energy Recover Ventilator (ERV) provides a complete change of air every 3 hours. It also recovers up to 90% of the energy spent to heat or cool your house by taking it from the outgoing air and transferring it to the incoming air.
The Genteq motor is the most efficient available in an ERV. It can save you $75 annually (@ $.08/kWh) compared to a conventional motor, and is practically silent when it runs.