An airtight and insulated home does not necessarily mean a well-ventilated home. When a home is well-sealed, it can become a virtual plastic bag, trapping dust, moisture, odors and chemical pollutants inside the home.
Installing an energy recovery ventilator, or ERV, will allow the home to maintain air circulation while minimizing energy loss. An ERV constantly exchanges heat from the warmed air going out, with the cooler and healthier air coming in from outside.
There are two types of ERVs: One is independent of, and completely separate from, the home's forced air system, whereas the other is integrated directly into it.
The best practice for installing an ERV is to hire an HVAC contractor to install the type of ERV that is integrated directly into the home's forced air ductwork. Although this should be done by an HVAC contractor, there are several design considerations you should be aware of when the ERV is installed:
Many homeowners try to ventilate their home by opening their windows and using a powerful ventilation fan, which lets out all the warmth or coolness. The fresh air coming in isn't filtered, so dust, pollen, soot, mold and other undesirables are introduced into your home. An ERV gives you a way of moving fresh, temperature-controlled air into your house while removing stale, contaminated air.
A whole-house ventilation system can bring fresh air indoors and reduce excess moisture.
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