The one sentence answer: a complete new cooling system for a typical Arizona home costs $8,000 to $15,000 installed in 2026, with smaller homes and simpler swaps coming in under that and large homes with top tier equipment going over. Nobody enjoys hearing a five figure number, so the rest of this guide is about understanding it, shrinking it, and making sure you only pay it once.
Typical Installed Prices
| What You’re Buying | Typical Installed Price | When It Applies |
|---|---|---|
| AC condenser and coil only | $6,000 – $10,000 | The furnace or air handler is newer and stays |
| Complete AC plus gas furnace system | $9,000 – $16,000 | Both halves are aging out together, the most common swap |
| Complete heat pump system | $9,000 – $17,000 | One outdoor unit handles cooling and heating |
| Top tier variable speed system | $14,000 – $20,000+ | Maximum efficiency and comfort, largest homes |
Most homes here need a 3 to 5 ton system, and size alone can swing the price by a few thousand dollars. These ranges assume a straightforward replacement with sound ductwork; duct repairs, electrical upgrades, or a relocated unit add to the number, and a good quote shows those as separate line items.
What Actually Moves the Price
- Size, done correctly. The right tonnage comes from a load calculation on your house, not from copying the old unit’s label. Oversizing costs more up front and then short cycles forever.
- The efficiency tier. Higher SEER2 equipment costs more and pays some of it back every summer at desert runtimes. The honest math on which tier pays off lives in our SEER guide.
- The refrigerant transition. New systems now ship with R-454B, and the equipment redesign that came with the changeover nudged prices up across every brand. Our refrigerant guide explains the alphabet soup.
- Heat pump or AC with furnace. The right answer depends on your house and your gas line; see the comparison before anyone quotes you either one by default.
- Your ductwork. A new system breathing through leaky ducts throws away efficiency you just paid for. Expect a good installer to evaluate the ducts, and budget for sealing if they need it.
- Installation quality. Two identical units can perform completely differently based on the install. This is the part of the price that is worth paying for; a cut rate install costs more than it saves by the second summer.
How to Pay Less Without Regretting It
- Get the size right, not big. A correctly sized 3.5 ton system beats an oversized 5 ton on price and comfort.
- Buy the middle of the efficiency range. For most homes the mid tier SEER2 equipment is the sweet spot; the top tier rarely pays for itself unless your runtime is extreme.
- Ask about rebates and incentives. Utility rebates and tax incentives come and go year to year; a good contractor knows what is currently on the table and handles the paperwork.
- Finance it instead of draining savings. Through GoodLeap you can apply in minutes and spread the cost into monthly payments, which matters most when the old unit dies in July.
- Replace on your schedule, not the AC’s. A planned shoulder season replacement beats an emergency one in a 115° week, on price and on your options.
Are You Sure You Need a New One?
In Arizona an AC gives you 12 to 17 years, a few less than the national average because of our runtime. If yours is younger than that and the repair quote is modest, fixing it is usually the smart money. The rule we use in the field: when a repair costs more than half the price of a replacement on a system past two thirds of its lifespan, replace. Our repair or replace guide walks through it, and our $89 service call gets you a straight diagnosis either way.
Getting a Real Number for Your House
Ranges are for reading; your house deserves an exact figure. Start with the instant estimator for a ballpark, bring our ten question checklist to every contractor who quotes you, and when you want it quoted straight, call or text 480-406-7487. We size it to your house, quote both good and better options, and we are still here after the install.