Every winter we get the same question from homeowners replacing aging equipment: "Should I get a heat pump or a furnace?" For most Phoenix homes the answer is heat pump — but not always. Here's how to decide.
How They Work
A gas furnace burns natural gas to produce heat, then a blower pushes that warm air through your ducts. Simple, powerful, fast.
A heat pump is essentially an air conditioner that runs in reverse. In summer it pulls heat out of your house; in winter it pulls heat from the outside air and brings it in. No combustion. Same equipment, two seasons.
Upfront Cost
- Heat pump: $5,000-$9,000 installed for a typical 3-ton residential unit - Gas furnace: $3,500-$6,500 installed (plus you need a separate AC) - Combined AC + furnace: $8,000-$14,000 total
If you're replacing both your AC and your heating system at once, a heat pump replaces both — for less total money than buying two separate units.
Operating Cost in Phoenix
This is where heat pumps win in our climate. Heat pumps operate at 250-400% efficiency — they move 2.5 to 4 units of heat for every unit of electricity used. Gas furnaces top out around 96% efficiency.
For a typical 1,800 sq ft Phoenix home in winter: - Heat pump heating: $35-$65/month - Gas furnace heating: $55-$95/month
Heat pumps lose efficiency below 35°F. In Minneapolis that matters. In Phoenix, where we maybe see ten nights a year that cold, it doesn't.
Climate Fit
Phoenix winters are mild. We have maybe 30 days a year where the heat actually runs for more than an hour. A heat pump handles 95% of our winter perfectly. For the rare cold snap (like the Feb 2011 freeze), a small electric heat strip backup handles the gap.
If you live in Flagstaff or Prescott, the math changes. For Maricopa County, heat pump wins.
When a Furnace Still Makes Sense
- You already have a working AC and need to replace only the heater. Pulling a working AC to install a heat pump is wasteful. - You have natural gas service and pricing is favorable in your area. Some valley cities have very cheap gas rates. - You strongly prefer the feel of furnace heat (it produces hotter air at the vents, which feels more "instant"). - You have an older home with marginal electrical service that can't handle heat pump electrical loads without panel upgrades.
Our Recommendation
For most Phoenix homeowners replacing equipment in 2026:
1. If you need a new AC AND your heating system is over 12 years old → install a heat pump. Replaces both. 2. If your AC is fine but your furnace died → repair the furnace if under 10 years old, or replace with another furnace. Don't tear out a working AC. 3. If you're building new or renovating heavily → heat pump every time.
Want a Real Number for Your Home?
We do free in-home assessments. We'll measure your home, look at your duct setup and electrical service, ask about your gas situation, and give you a written quote with both options. No pressure, no upsell.
Call (602) 555-0234 or book online.
Need help with this in your home?
Carlos and team are one phone call away. Same-day service across the Phoenix Valley.