Heat Pump Payback in Caldwell, ID
Is a heat pump worth it in Caldwell?
Caldwell 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 $5,500. The heat pump would cost about $92 more a year to run than the furnace it replaces, a premium with no payback. There's no spin on that: Caldwell's numbers say wait.
Compare against another city
Caldwell is one of 3206 cities covered here, each run through the same model. Search another below.
Why Caldwell's climate drives this number
Degree days tell the story here: Caldwell racks up 5220 heating degree days each year (base 65°F), and summers are hot enough that cooling matters as much as heating, with 1130 cooling degree days on the cooling side. 8.1°F is the figure equipment gets sized against here, the 99th-percentile cold snap, not an average day, with a low of -5.1°F in the 2024 station record. Worked through the model, that's a seasonal COP of 2.89 on the cold-climate unit fit for this climate. Caldwell needs the cold-climate class of unit: past a 25°F design temperature a standard heat pump falls back on resistance backup often enough to eat the savings. Climate figures trace to the nearest NOAA station, Caldwell Industrial Airport, 1.3 miles from Caldwell.
What it actually costs to run, year to year
Modelled on a typical 2000-square-foot house, the heat pump draws about 4,574 kWh a year to keep it warm, plus cooling, for a combined electric bill near $693 a year. Caldwell's gas rate of $7.69 per Mcf, applied to the 54 Mcf a year the furnace burns, puts the current furnace-and-AC running cost near $601 a year, against 12.52¢ per kWh for electricity. With running costs higher every year, there is no payback at any purchase price; over 15 years, against a like-for-like replacement, a household here would end $6,877 behind.
The break-even point in Caldwell
The heat pump would become the cheaper option in Caldwell if electricity fell to 10.3¢/kWh (from 12.52¢) or gas rose above $9.38 per Mcf (from $7.69). At today's prices a cheaper quote cannot rescue the gas comparison in Caldwell, since there is no yearly saving to recover it from.
The other scenario: no gas furnace to begin with
Plenty of homes in Caldwell heat with electricity alone, no gas line involved. Swap the comparison to resistance heat instead of gas, and Caldwell's answer improves. The saving here runs about $1,145 a year, which recovers the extra $10,000 spent going electric in roughly 8.7 years.
Caldwell against the rest of the country
Caldwell lands at position 549 out of 3206 cities on heating severity (coldest is 1), and 527 out of 3206 by population size (biggest is 1). That's the coldest third of the dataset, where climate does most of the work behind this figure.
Next step if you live in Caldwell
About 73,088 people live in Caldwell, 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 Caldwell's 2.89 seasonal COP and payback figure. At a 8.1°F design temperature, Caldwell sits in cold-climate territory; the guide to that class of unit explains why.