Question 1

When is an ERV better than an HRV?

Accepted Answer

ERVs are better when you want to retain indoor humidity in winter (homes that tend to be too dry) or when you want to keep outdoor humidity out in summer. If your home already feels dry in winter, an ERV may be a better choice than an HRV.

Question 2

Can an ERV replace my existing HRV?

Accepted Answer

In most cases, yes. ERVs use the same ductwork and mounting as HRVs. If your current HRV is old or you're experiencing dry air issues, switching to an ERV is a straightforward swap.

Question 3

Do ERVs work in summer too?

Accepted Answer

Yes. In summer, the ERV works in reverse — it pre-cools and dehumidifies incoming outdoor air using the cooler, drier exhaust air from inside. This reduces the load on your air conditioner.

Question 4

How much energy does an ERV save?

Accepted Answer

ERVs recover 70–80% of the energy from exhaust air. Without one, ventilating your home means losing all that conditioned air. Over a full heating season in Ontario, an ERV can significantly reduce your heating and cooling costs.

ERVs in Dutton

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