The short answer
A complete HVAC replacement in Arizona — both the cooling and the indoor heating/air-handling equipment — typically runs about $9,000 to $18,000 installed in 2026. A single-system heat pump that does both jobs often falls within that same band. The spread comes from size, efficiency, ductwork, and equipment tier.
What's included in a 'whole-HVAC' replacement?
A whole-system replacement means swapping both halves of your comfort system: the outdoor condenser (or heat pump) and the indoor furnace or air handler, plus the matching coil, refrigerant lines if needed, a new thermostat, and the permit and inspection. Replacing both at once resets the entire system's lifespan and guarantees the two halves are matched for rated efficiency.
If you're moving to a heat pump, one system replaces both the AC and the furnace — you cool in summer and heat in Phoenix's mild winters from the same equipment.
What does a full HVAC system cost in Arizona in 2026?
Typical installed ranges for a single-family Arizona home:
- AC + air handler/furnace, baseline efficiency: about $9,000–$13,000
- AC + furnace, higher efficiency (15.2+ SEER2, rebate-eligible): about $12,000–$18,000
- Heat pump system (cools and heats): roughly $10,000–$18,000 depending on size and efficiency
- Add-ons that raise the price: duct repair/replacement, electrical upgrades, zoning, or premium indoor air quality equipment
These are frames, not quotes
Your home's cooling load, duct condition, and electrical service determine your real price. A free in-home assessment is the only way to size and price the job correctly.
When is whole-system replacement the right call?
Replacing everything at once usually makes sense when the AC and furnace are similar ages and both near the end of their service life, when a failed compressor meets an aging furnace, or when you want the efficiency, warranty, and rebate eligibility of a fully matched system.
If only one half has failed and the other is healthy and recent, a partial replacement can be smarter — see our guide on whether to repair or replace a 15-year-old AC.
How do you compare HVAC bids fairly?
To compare bids apples-to-apples, line them up on:
- System size in tons — every honest bid should show the same tonnage after a load calculation
- SEER2 / efficiency rating and whether the system qualifies for SRP Cool Cash
- Exact equipment model numbers and whether the indoor/outdoor units are AHRI-matched
- What's included: permit, new thermostat, refrigerant lines, duct work, haul-away
- Parts and labor warranty length — and who honors it
How do rebates and tax credits lower the cost?
SRP customers installing qualifying 15.2+ SEER2 equipment can claim SRP Cool Cash (up to $1,125, based on compressor type and tonnage, through April 30, 2027), and income-qualified households may access up to $8,000 toward a heat pump through the federal HEAR / Efficiency Arizona program (funded through September 30, 2031). The federal 25C tax credit ended for installs after December 31, 2025.
RM III files the SRP paperwork for you and points you to the federal programs you may qualify for — so the rebate isn't just a line in a sales pitch.
If both are near the end of their life or similar ages, replacing them together usually costs less than two separate jobs, guarantees a matched system, and protects rebate eligibility. If one is healthy and recent, replacing only the failed half can be the better value. A free assessment makes the call clear.
A heat pump replaces both with one system, which can be cost-competitive — especially in Phoenix, where the heating season is short and a heat pump is very efficient. Total cost depends on your home and existing equipment; we'll compare both options on your estimate.
Terms in this guide
- Heat pump
- An all-electric system that both cools and heats by moving heat rather than burning fuel. A heat pump cools exactly like an AC in summer and reverses to provide efficient heat in Phoenix's mild winters — one system instead of a separate AC and furnace.
- Ton (of cooling)
- A measure of an air conditioner's cooling capacity. One ton equals 12,000 BTU/hour of heat removal. Phoenix homes are commonly sized around 1 ton per 400–600 square feet, but the only correct way to size a system is a Manual J load calculation — not a rule of thumb.
- SEER2
- Seasonal Energy Efficiency Ratio 2 — the current rating for how efficiently a central AC or heat pump cools over a season. Higher is more efficient. As of 2023 the federal minimum for new split-system ACs in the hot-dry Southwest (including Arizona) is 14.3 SEER2; SRP's Cool Cash rebate requires 15.2 SEER2 or higher.
- AHRI-matched system
- An outdoor and indoor unit certified by the Air-Conditioning, Heating, and Refrigeration Institute to perform together at their rated efficiency. Rebates and warranties generally require an AHRI-matched system — mixing mismatched parts can void both.
- SRP Cool Cash
- Salt River Project's rebate for SRP electric customers who install qualifying high-efficiency equipment (15.2 SEER2 or higher). It pays up to $1,125, with an additional variable amount based on system tonnage, for installs completed by April 30, 2027. RM III files the paperwork for you.
- HEAR / Efficiency Arizona
- The federal Home Electrification and Appliance Rebates program, administered in Arizona as 'Efficiency Arizona.' It offers income-qualified households up to $8,000 toward a qualifying heat pump, with funding available through September 30, 2031.