Energy recovery ventilators keep high performance homes comfortable
As building codes and green building program call for tighter building envelopes, one trade-off is the need for mechanical ventilation in the home.
For instance, the 2012 International Energy Conservation Code calls for a maximum of three air changes per hour at 50 Pascal (3ACH50) in most states. Without that flow of fresh air, the occupants could experience elevated carbon dioxide levels, diminished overall indoor air quality and potentially negative health consequences.
Continuous mechanical ventilation is the most common solution. At the 2015 Greenbuild Expo, Barry Stephens, business development director for Zehnder America, discusses the importance of ventilation ERVs and HRVs – and installing them properly.
The choice of ERV or HRV depends on the climate. The HRV, or heat recovery ventilator can minimize energy loss and save on heating and cooling costs. The heated or cooled air from the house is exchanged with fresh exterior air, while transferring some of the heat or coolness generated in the home to the incoming air.
An ERV, or energy recovery ventilator, performs the function but also helps to control humidity, making it the right choice for warm, humid climates.
Read more about energy recovery & heat recovery ventilation.
Companies: Zehnder America
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