The better insulated your home is, the better it retains heat in cold weather and cold in hot weather. However, insulation also prevents fresh air from entering your home. An HRV ventilates your home and circulates fresh outdoor air without compromising energy efficiency.
Your HRV has many working parts that require quick repairs, from their heat-exchange cores to their filters, fans, and defrosters. If any of these components break, your energy efficiency and air quality will both decrease.