Updated August 15, 2026 · WattCostLab Editorial Team
Air Source Heat Pump Installation Cost
Air source heat pumps can be ducted, ductless or hybrid. The installation cost depends on the building layout, heating load, electrical capacity, number of zones and whether existing ducts can be reused.
Ducted vs ductless cost structure
| Design | Main cost drivers |
|---|---|
| Ducted heat pump | Air handler, duct condition, electrical work, controls, refrigerant lines |
| Single-zone ductless | One indoor head, line-set route, mounting, electrical circuit |
| Multi-zone ductless | Multiple indoor units, longer line sets, condensate routing, controls |
| Hybrid / dual-fuel | Heat pump plus furnace integration and control strategy |
Cold-climate performance
For heating-dominated climates, review capacity at low outdoor temperatures. A system that looks adequately sized at mild conditions may require supplemental heat during colder periods if its low-temperature capacity does not match the building load.
Electrical considerations
Outdoor units, air handlers and resistance backup heaters can require substantial electrical capacity. Ask the contractor whether the existing panel and circuits are sufficient and whether electrical upgrades are included in the quote.
Questions to ask
- What heating and cooling loads were calculated?
- What capacity does the equipment provide at the local winter design temperature?
- Is backup heat required?
- Can existing ducts be reused?
- Are electrical upgrades included?
- How will condensate and refrigerant lines be routed?
Related pages
See Heat Pump Installation Cost, Heat Pump Running Cost Calculator, and HVAC Replacement Cost.
FAQs
Is a ductless heat pump always cheaper to install?
No. A single-zone ductless system can be simple, but multi-zone projects with many indoor units, long refrigerant runs or difficult access can become more complex.
Can an air source heat pump replace a furnace?
In many homes it can provide most or all heating, but the design depends on climate, building load, equipment capacity at low temperature and any backup-heating strategy.
Why is cold-climate sizing important?
Heat-pump capacity and efficiency change with outdoor temperature. The selected equipment should be evaluated at the temperatures relevant to the home's climate.