Thermostat settings by state
Thermostat settings in Idaho
By Ismail Farooq · Updated 2026-10-30
How most homes heat: Natural gas furnaces in cities, with electric heat and heat pumps elsewhere. Electricity is relatively cheap.
Idaho has cold winters and hot, dry summers, especially around Boise. Electricity from hydropower has kept rates low, so electric heat, baseboard heaters and heat pumps are more common than in many cold states. Baseboard heaters use line-voltage thermostats, not 24 V ones; see baseboard heater thermostat wiring.
Eastern Idaho around Idaho Falls is zone 6B with very cold nights. Heat pumps there need a cold-climate model or a gas backup, and the aux heat lockout should come from the installer’s balance point.
Climate zones in Idaho
| Place | IECC zone |
|---|---|
| Boise | 5B |
| Twin Falls | 5B |
| Coeur d’Alene | 5B |
| Idaho Falls | 6B |
Zones follow county lines on the 2021 IECC map, and some counties changed zone between code editions. DOE’s Building America climate zone map lists every county.
Starting settings
- Everyday setpoints: about 68 °F in winter and 78 °F in summer while you’re home, set back while you sleep or are out (DOE’s guidance).
- Gas, oil or propane furnace or boiler: setbacks of 7 to 10 °F are fine; use the thermostat’s early-start feature so the house is warm on time.
- Heat pump: keep winter setbacks small (2 to 4 °F) so a cold morning doesn’t bring on aux heat.
- Dry air: a higher cooling setpoint still feels comfortable, and winter air gets very dry. A whole-house humidifier wired to the thermostat should aim for about 30–40%, lower in very cold weather.
- Freeze protection: keep the away or minimum temperature at about 55 °F or higher in winter, and make sure the thermostat keeps working without Wi-Fi.
Heat pump lockouts for Idaho
If you have a heat pump, these are starting points for the outdoor temperatures that control backup heat. Your installer’s balance point is better if you have it.
| Zone | Aux heat lockout (electric strips) | Compressor lockout (dual fuel) |
|---|---|---|
| 5 | 25–35 °F for a standard heat pump; lower for a cold-climate model | Around 20–35 °F |
| 6–8 | From the heat pump’s rated output at low temperatures; cold-climate models often run well below 10 °F | Often 0–25 °F, from the installer’s balance point |
Rebates
Many utilities give rebates or bill credits for smart thermostats, sometimes in return for joining a peak-day program. Programs change often, so check your electric and gas utility’s website, or search by ZIP code in the ENERGY STAR rebate finder.