Should Ammon switch to a heat pump?

Ammon is a place where a heat pump genuinely costs more to operate than the alternative. Swap a failed furnace and AC for a heat pump rather than buying like-for-like, and the extra cost here runs $3,500 after a $2,000 federal tax credit. Running costs here land $220 a year HIGHER than the furnace it replaces, so that premium is never recovered. There's no spin on that: Ammon's numbers say wait.

The climate behind Ammon's payback figure

Ammon has a cold winter that leans hard on heating equipment — 6714 heating degree days a year against a 65°F base — and summers add a moderate cooling load, at 545 cooling degree days. The 99% winter design temperature here — the cold snap equipment must be sized for, not the seasonal average — is 0°F, against a record low of -14.1°F. That puts the seasonal coefficient of performance at 2.7 for the recommended cold-climate unit. A cold-climate unit is the right call in Ammon — below 25°F design temperature, a standard heat pump leans hard on electric-resistance backup, which erases most of the savings. These numbers come from IDAHO FALLS REGIONAL ARPT, the closest NOAA station, 6.1 miles out.

Ammon's running-cost comparison, in dollars

Modelled on a typical 2000-square-foot house, the heat pump draws about 6,297 kWh a year to keep it warm, plus cooling, for a combined electric bill near $847 a year. The gas furnace it replaces burns roughly 70 Mcf a year at 7.69 per Mcf here, for a running cost near $626 a year (electricity here runs 12.52¢/kWh). Looked at as a full purchase rather than an incremental one, payback here is longer than the 15-year equipment life, leaving the 15-year total $6,805 behind.

If your home heats with electric baseboard instead of gas

Not every home in Ammon has gas service. Against electric-resistance heat — baseboard or an electric furnace, both 100% efficient but still just resistance — the case for switching gets stronger here. The saving here runs about $1,370 a year, which recovers the extra $8,000 spent going electric in roughly 5.8 years.

How Ammon compares nationally

Ranked against the other 3206 cities covered, Ammon comes in at 59 for heating severity — 1 would be the coldest place in the dataset — and 1916 by population, where 1 is largest. That's the coldest third of the dataset, where climate does most of the work behind this figure.

Deciding what's next in Ammon, ID

About 20,095 people live in Ammon, Idaho, and every number on this page is what a contractor would actually work from when quoting a system here — the point isn't to replace that quote, it's to tell you whether to bother asking for one. Here, there's no cost penalty to waiting until your current furnace or AC actually needs replacing.

Ask a local HVAC contractor for a quote before committing either way.

More on how this number was built

Nothing above is a black box: the methodology guide shows the full arithmetic behind Ammon's 2.7 seasonal COP and payback figure. Ammon's 0°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.