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Last Updated: Sunday, October 05, 2008 |
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Energy Recovery Ventilator (ERV) – Homes that are tightly constructed can significantly reduce air infiltration and reduce the heating and cooling requirements. To keep a healthy supply of fresh air in a tight house a Heat Recovery Ventilator (HRV) or Energy Recovery Ventilator (ERV) is recommended. These systems allow you to have ample fresh air brought into the home in a controlled manner. HRV’s capture sensible heat. ERV’s capture both sensible and latent (moisture) energy. Our ERV uses a rotating desiccant wheel to exchange temperature and moisture from the outgoing air to the incoming fresh air. Notice in the data below how the outdoor air is warmed by over 25 degrees before being introduced to the house. Also, the house dew point stays constant in the low 60’s while the outdoor dew point falls to near 30. Venmar ERV – One of the ERV products available |
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In 1F = Indoor bathroom exhaust |
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Fresh = Fresh air to house |
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Exhaust = Stale air exhaust |
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Outdoor = Fresh outdoor air |
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Winter Mode Operation of HRV |
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Desiccant Wheel |
