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HRV and ERV Systems

HRV or ERV – Which is Best?

Heat Recovery Ventilators (HRV)

HRVs transfer heat from outgoing air to incoming air. The two different airflow streams never meet, only the heat is kept. Efficiency levels can vary from 55% up to 93% in the very best products.

Energy Recovery Ventilators (ERV)

ERVs transfer heat AND also transfer humidity. This makes them more efficient, and they also help keep your indoor humidity levels more manageable. In summer, ERVs remove humidity from incoming air (making less work for your AC), but in winter it reverses and they remove humidity from outgoing air.

How to Choose?

Here are some simple rules of thumb for choosing between an HRV and ERV. Please keep in mind that sometimes your specific home will not fall into one of these exact categories, so for best results consult a professional.

  • My house is too humid in winter – choose an HRV.
  • My house is too dry in winter – choose an ERV.
  • My local climate is very humid in summer – choose an ERV.
  • My local climate is very dry in summer – choose an HRV.

An HRV or an ERV may not completely eliminate the need for a humidifier or dehumidifier, it will help them work more efficiently.

Our HRV and ERV Models

We carry a wide variety of ventilators made by Lennox and Carrier. Here are some of our customer favourites. If you’re interested in a model you don’t see below, we would be happy to provide it for you on request.