How long do heat pumps last?
Most air-source heat pumps last 12–15 years; geothermal far longer. Climate, maintenance and run-time all move the number — here is what to expect.
Typical lifespan by type
| Type | Typical lifespan |
|---|---|
| Air-source (ducted) | 12–15 years |
| Ductless mini-split | 15–20 years |
| Geothermal (indoor unit) | 20–25 years |
| Geothermal (ground loop) | 50+ years |
Heat pumps run year-round for both heating and cooling, so they log more hours than a furnace — which is why air-source units land a bit below a furnace's 15–20 years.
What shortens a heat pump's life
- Skipped maintenance — dirty coils and low refrigerant strain the compressor.
- Oversizing — short-cycling wears parts faster.
- Harsh coastal/salt air — corrodes outdoor coils.
- Heavy run-time in extreme climates.
How to make yours last longer
Right-size it, service it yearly, change filters, keep the outdoor unit clear, and address small issues early. See our maintenance checklist.
Frequently asked questions
How long do heat pumps last on average?
Air-source units typically last 12–15 years, ductless mini-splits 15–20, and geothermal 20–25 years (with ground loops lasting 50+).
Why do heat pumps last less than furnaces?
They run for both heating and cooling year-round, accumulating more operating hours than a heat-only furnace.
How do I make a heat pump last longer?
Right-size it, service it annually, change filters regularly and keep the outdoor unit clear of debris.
Related
Sources & further reading
Educational guide, reviewed against US DOE & ENERGY STAR guidance and updated June 2026. Estimates only — not a substitute for a professional assessment or Manual J load calculation.