Fuzz needs an HRV. HRVs are required in new home building codes in Alberta because houses are so sealed that they require greater ventilation to maintain air quality AND remove excess moisture from venting but also condensing at the heat exchanger. An ERV will transfer heat AND moisture to the fresh air whereas an HRV just transfers heat so an ERV would maintain the humidity level in the house and an HRV will lower it.
HRVs to lower high humidity in the winter. ERVs to regulate humidity with the outside year round. HRVs in Alberta.
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