HRV / ERV
A heat- or energy-recovery ventilator that exchanges stale indoor air for fresh outdoor air while transferring heat (HRV) or heat and moisture (ERV).
Quick answer
HRV / ERV: A heat- or energy-recovery ventilator that exchanges stale indoor air for fresh outdoor air while transferring heat (HRV) or heat and moisture (ERV). Typical cost: $1,500–$4,000 installed..
Why it matters
Tight, modern homes need mechanical ventilation to control CO2, VOCs, and humidity. ERVs are now code in many climate zones for new construction.
Typical cost
$1,500–$4,000 installed.
Pros
- • Cuts indoor pollutants and humidity
- • Recovers 60–85% of conditioned air energy
Cons
- • Adds ductwork
- • Filters and cores need annual maintenance
Common uses
- • New tight construction
- • Deep retrofits
- • Homes with high indoor humidity
Alternatives
Bath fans + makeup-air vents (less efficient)
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Frequently asked questions
- HRV vs ERV — which do I need?
- ERV in humid climates (manages moisture); HRV in cold-dry climates.
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