Heat pump installation
Knowing how a heat pump install works helps you compare quotes and avoid surprises. Here is the process, timeline and cost.
The installation process, step by step
- Load calculation (Manual J). A good installer measures your home's heat loss — not just square footage — to size the unit (then Manual S to pick the model).
- Remove the old system (if replacing) and prep the site and electrical.
- Set the outdoor unit on a pad or wall brackets, with clearance for airflow.
- Mount the indoor unit / air handler and connect ductwork or mini-split heads.
- Run refrigerant lines, electrical and condensate drain, then pull a vacuum and charge the refrigerant.
- Commission and test — verify airflow, refrigerant charge, defrost and controls, and walk you through the thermostat.
How long does it take?
A straightforward ducted replacement usually takes 1 day. A ductless mini-split runs from a few hours (single zone) to 1–2 days (multi-zone). Geothermal takes longest — several days to weeks — because of the ground loop drilling or trenching. New ductwork or electrical-panel upgrades add time.
Installation cost
Labor is a big share of the total. Typical installed prices: ducted air-source $5,000–$15,000; ductless mini-split $3,500–$5,000 per zone; geothermal $18,000–$45,000. Permits, a panel upgrade, or duct modifications add to it. Estimate yours with our cost calculator, and remember the federal 25C/25D tax credit expired Dec 31, 2025 — factor in state and utility rebates instead.
DIY vs professional installation
Pre-charged DIY mini-split kits exist, but a full install involves refrigerant handling (EPA certification), electrical work, permits and a proper vacuum/charge — get any of these wrong and you lose efficiency, the warranty, or worse. For all but the simplest DIY kits, a licensed HVAC contractor is strongly recommended, and required to keep most manufacturer warranties valid.
Frequently asked questions
How long does it take to install a heat pump?
A ducted replacement is usually 1 day; a ductless mini-split a few hours to 1–2 days; geothermal several days to weeks. Ductwork or panel upgrades add time.
How much does heat pump installation cost?
Ducted air-source $5,000–$15,000; ductless mini-split $3,500–$5,000 per zone; geothermal $18,000–$45,000 — plus permits and any electrical/duct work.
Can I install a heat pump myself?
Pre-charged DIY mini-split kits exist, but full installs need refrigerant handling, electrical work and permits. A licensed contractor is recommended and usually required for warranty coverage.
Do I need a permit to install a heat pump?
Usually yes — most jurisdictions require mechanical and electrical permits. A licensed installer handles this as part of the job.
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.