Energy savings
Ventilation can account for 20–40% of a home's heat loss. The heat pump's settings don't compensate for this — the energy simply leaves faster.
A well-maintained heat-recovery ventilation unit returns a large share of the exhaust air's heat. Clogged filters lower both efficiency and airflow.
Change filters per the manufacturer's recommendation, check the supply/exhaust balance, and avoid constantly open vent windows during the heating season.
We don't recommend it. Air quality worsens and moisture can condense. A heat-recovery unit is already economical.
Typically every 3–6 months, depending on the environment.
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