Heat Pump Payback in Middleton, ID
Middleton, ID: the heat pump payback math
Here in Middleton, the honest answer is that a heat pump raises your annual running cost. $5,500 is what Middleton would pay extra to go electric rather than replace the furnace and AC with the same again. Unfortunately the electric bill outweighs the gas bill it replaces by about $92 a year here, so the extra spend stays unrecovered. There's no spin on that: Middleton's numbers say wait.
Compare against another city
This runs the same numbers for 3206 US cities, not just Middleton. Look one up here.
Why Middleton's climate drives this number
Middleton has a cold winter that leans hard on heating equipment, 5220 heating degree days a year against a 65°F base, and summers are hot enough that cooling matters as much as heating, at 1130 cooling degree days. Sizing runs off the design temperature, not the average day: 8.1°F here (coldest 2024 reading -5.1°F), which works out to a seasonal COP of 2.89 for the cold-climate class of unit this climate calls for. Below the 25°F line where a standard machine starts leaning on resistance backup, Middleton sits firmly in cold-climate territory, so that's the class of unit priced here. Climate figures trace to the nearest NOAA station, Caldwell Industrial Airport, 4.2 miles from Middleton.
Middleton's running-cost comparison, in dollars
A 2000-square-foot house here would pull roughly 4,574 heating kilowatt-hours annually on top of cooling, totalling about $693 a year on electricity. The gas furnace it replaces burns roughly 54 Mcf a year at $7.69 per Mcf here, for a running cost near $601 a year including the old AC (electricity here runs 12.52¢/kWh). 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.
What would change Middleton's answer
The heat pump would become the cheaper option in Middleton 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 Middleton, since there is no yearly saving to recover it from.
If your home heats with electric baseboard instead of gas
Plenty of homes in Middleton heat with electricity alone, no gas line involved. Compared with baseboard or electric-furnace resistance heat, the numbers shift in the heat pump’s favor. About $1,145 a year comes back this way, enough that the 8.7-year payback clears the $10,000 premium comfortably within the equipment's life.
How Middleton compares nationally
Ranked against the other 3206 cities covered, Middleton comes in at 552 for heating severity, 1 would be the coldest place in the dataset, and 2858 by population, where 1 is largest. That's the coldest third of the dataset, where climate does most of the work behind this figure.
What to do with this number in Middleton
About 11,730 people live in Middleton, 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.
Where Middleton's figure comes from
Nothing above is a black box: the methodology guide shows the full arithmetic behind Middleton's 2.89 seasonal COP and payback figure. At a 8.1°F design temperature, Middleton sits in cold-climate territory; the guide to that class of unit explains why.