Safety first: These guides cover simple homeowner checks only. Stop and call a qualified technician for gas odors, burning smells, repeated breaker trips, refrigerant work, or equipment disassembly.

What Dual Fuel Means

A dual-fuel system pairs an electric heat pump with a gas furnace. The heat pump can cool the home in summer and provide heat during milder winter weather. At a configured outdoor temperature or operating condition, the controls switch to the furnace.

This is different from electric auxiliary heat. A correct proposal should state the heat pump, furnace, thermostat or controller, and the intended changeover strategy.

Why Utah Homeowners Consider It

Utah combines hot summers, cold winter periods, widespread natural-gas service, and growing rooftop solar adoption. Dual fuel can provide efficient shoulder-season heating while retaining strong furnace output in colder weather. Whether it saves money depends on local electricity and gas rates, equipment performance, solar production, and control settings.

The Balance Point Is Not One Universal Number

A contractor should compare the home's heating load with the heat pump's published capacity at low temperatures. The economic changeover point—where gas becomes less expensive than electricity—may differ from the capacity balance point. Both can change as utility rates change.

  • Documented heating load
  • Cold-weather capacity data
  • Gas and electric operating costs
  • Thermostat and changeover configuration
  • Backup operation during extreme cold

Questions Before You Sign

Ask what runs at 45°F, 30°F, and the local winter design temperature; whether the furnace and heat pump can run at the same time; how defrost works; and who will verify controls after installation. If solar is part of the decision, compare seasonal production with winter heating demand rather than annual totals alone.

Trusted References

Sources & Further Reading

Common Questions

Frequently Asked Questions

Will a dual-fuel system always lower bills?

No. Savings depend on equipment performance, weather, utility rates, controls, and the home itself.

Can I prioritize the heat pump over gas?

Often yes, within equipment and control limits. The commissioning technician should configure and test the intended strategy.