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Energy recovering ventilation

An ERV provides whole-home ventilation.

  • heat recovery, just like an HRV system,
  • controls humidity.
    The difference with an HRV: an ERV also takes the humidity out of the outgoing air and puts it into the incoming air. ERVs tend to hold on the moisture in the air.

from wiki:
An ERV is a type of air-to-air heat exchanger that transfers sensible heat as well as latent heat. Because both temperature and moisture are transferred, ERVs are described as total enthalpic devices. In contrast, a heat recovery ventilator (MVHR / HRV) can only transfer sensible heat.

  • all ERVs are HRVs, but not all HRVs are ERVs.
  • In the UK, MVHR will be more effective than ERV.

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