Furnace and AC or a heat pump: what should you compare?
A gas furnace with an air conditioner, an electric heat pump and a heat pump paired with a furnace can all appear on replacement quotes. To choose between them, you need to know how each proposed system would serve your house.
Start with the complete arrangement. “Gas” or “electric” leaves too much of it unexplained.
What each option does
| Arrangement | Heating | Cooling |
|---|---|---|
| Gas furnace and AC | The furnace burns gas | Separate AC equipment |
| All-electric heat pump | The heat pump, plus any specified supplemental electric heat | The heat pump |
| Dual fuel | A heat pump and furnace, coordinated by controls | The heat pump |
A heat pump can use ducts or serve rooms through a ductless arrangement. Have the quote explain how conditioned air reaches the rooms, too.
Ask about winter performance at your house
For a Reno area property, ask how the selected heat pump's heating output compares with the home's calculated need under the outdoor conditions used for the design. Include the role of any backup heat.
A cold climate designation tells you something about tested equipment performance. The installer still needs to select a system for the building and location.
For dual fuel, ask when the furnace takes over and which controls manage the change. For an all electric system, ask what supplemental heat is included and what electrical work it needs.
Efficiency ratings aren't a bill estimate
SEER2 rates seasonal cooling efficiency. HSPF2 rates seasonal heat pump heating efficiency. AFUE describes a gas furnace's fuel conversion efficiency. Comparing those numbers directly won't tell you which system costs less to operate.
If a salesperson estimates savings, ask which gas and electricity rates, usage and backup heat assumptions were used. Your current bills can inform the estimate, but they don't guarantee the cost of a different system.
Price the complete change
Compare equipment alongside ducts, electrical supply, controls, gas or venting changes, permits and removal. An option that keeps more of the existing installation can involve different work from one that changes the whole arrangement.
Check current incentive terms directly with the program. Don't subtract an old advertisement's tax credit or rebate from a quote without confirming that the installation qualifies.
The sizing guide explains how the house enters the calculation. The replacement quote guide helps you compare the work around the equipment.
Sources
- ENERGY STAR describes heat pumps and dual fuel arrangements here: www.energystar.gov/products/energy_star_home_upgrade/clean_heating_cooling
- ACCA Manual S equipment selection method: www.acca.org/standards/technical-manuals/manual-s
- See the heat pump criteria: www.energystar.gov/products/air_source_heat_pumps/key-product-criteria
- Furnace ratings: www.energystar.gov/products/furnaces/key_product_criteria
- IRS termination guidance: www.irs.gov/newsroom/faqs-for-modification-of-sections-25c-25d-25e-30c-30d-45l-45w-and-179d-under-public-law-119-21-139-stat-72-july-4-2025-commonly-known-as-the-one-big-beautiful-bill-obbb
- NV Energy’s current program information: www.nvenergy.com/save-with-powershift/home-energy-saver/residential-ac-and-mid-stream/residential-air-conditioning