How much does heat pump replacement cost in Phoenix?

Heat pump replacement cost in Phoenix comes down to a handful of things you can learn about before a contractor ever gives you a number: the size of the system, its efficiency ratings, the condition of your ducts, and how much of the job goes beyond swapping equipment. Knowing those factors makes it easier to compare quotes that look very different on paper.

What you’re paying for in a heat pump replacement

A heat pump heats and cools your home with the same equipment. The most common type, an air-source heat pump, moves heat between your house and the outside air, and a reversing valve switches the direction of refrigerant flow so the system can run in cooling mode.

A replacement quote usually bundles several pieces of work:

• Equipment: the outdoor unit and the indoor air handler or coil. On a split system, replacing both halves together keeps them matched, and SRP’s rebate requires it.
• Labor: removing the old system, installing the new one, and starting it up.
• Permit: you need a permit to install a new heat pump in Phoenix. Work that requires a permit must be done by a licensed journeyman or apprentice, and anyone who handles the refrigerant must hold EPA Section 608 certification.
• Extra work: duct repairs or replacement, and any electrical changes the new unit needs.

What pushes the price up or down

These are the main things that move a heat pump quote:

• Size. Heat pumps are sized by capacity, and a larger unit costs more. ENERGY STAR advises sizing equipment from the actual characteristics of your home, and warns that oversized equipment may cycle too often, leading to less comfort and a shorter lifespan. Bigger isn’t automatically better; see what size system a Phoenix home needs.
• Efficiency ratings. Heat pumps carry SEER2 and EER2 ratings for cooling and an HSPF2 rating for heating (units rated before 2023 used SEER and HSPF). The U.S. Department of Energy notes that, in general, the higher the HSPF and SEER, the higher the cost of the unit. A more efficient unit costs more up front and less to run.
• Type. Air-source heat pumps cost less than ground-source (geothermal) systems. Ductless mini-splits skip ductwork entirely, which changes what the installation involves.
• Ductwork. Most heat pumps, other than ductless mini-splits, need ducts. Even if you have them, a contractor may recommend replacing ducts that are old, damaged, or inefficient. The Department of Energy says a heat pump needs about 400 to 500 cubic feet per minute of airflow per ton of cooling capacity, and that efficiency and performance deteriorate if airflow is much less than 350 cfm per ton. Undersized or leaky ducts can hold back a new system.
• Brand. Higher-end brands cost more for similar capacity, so compare quotes on equipment of the same size and rating.
• Installation complexity. A straight swap in the same location is simpler than a job that adds ducts, moves equipment, or changes the electrical supply.

Rebates that can lower the cost

SRP’s Cool Cash rebate applies to a new AC unit, heat pump, or mini-split. To qualify, the system needs a SEER2 rating of 15.2 or higher and must be installed by a contractor licensed in Arizona to install residential air conditioning. On split central systems, both the indoor air handler and the outdoor condensing unit must be replaced, and single-stage systems require a Manual J load calculation with the application. The rebate must be submitted within 6 months of installation. See SRP AC rebates for how the program works.

APS ended its AC rebate, and the duct sealing rebate that ran through it, so APS customers shouldn’t build a utility rebate into the price. The federal energy-efficiency tax credit (25C) also ended for equipment installed after December 31, 2025.

Before you sign a quote

A replacement is a large purchase, so get more than one written quote and compare them line by line. A gap between two quotes may come down to whether one includes ductwork or electrical work and the other doesn’t.

Ask each contractor for:

• The size (tonnage) and efficiency ratings of the unit, and how they calculated the size
• Whether the quote replaces both the outdoor unit and the indoor air handler or coil
• Whether the permit, electrical work, and removal of the old unit are included
• Whether they will test the ducts for leaks and check refrigerant charge and airflow at startup
• The warranty on the equipment and on the labor
• Whether the system qualifies for your utility’s rebate, and who files the paperwork