Heat Pump Payback in Littleton, CO
Should Littleton switch to a heat pump?
In Littleton, a heat pump would cost more to run each year than what you have now. Swap a failed furnace and AC for a heat pump rather than buying like-for-like, and the extra cost here runs $5,500. Running costs here land $199 a year higher than the furnace it replaces, so that premium is never recovered. There's no spin on that: Littleton's numbers say wait.
Compare against another city
This runs the same numbers for 3206 US cities, not just Littleton. Look one up here.
The climate behind Littleton's payback figure
5280 heating degree days pile up here every year, so Littleton has a cold winter that leans hard on heating equipment; the cooling side runs to 919 cooling degree days, where summers add a moderate cooling load. -8°F is the figure equipment gets sized against here, the 99th-percentile cold snap, not an average day, with a low of -9.9°F in the 2024 station record. Worked through the model, that's a seasonal COP of 2.51 on the cold-climate unit fit for this climate. Littleton 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. These numbers come from Centennial Airport, the closest NOAA station, 9.2 miles out.
Littleton's running-cost comparison, in dollars
Electricity use for heating alone comes out to about 5,327 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $1,010 a year. Littleton's gas rate of $11.17 per Mcf, applied to the 55 Mcf a year the furnace burns, puts the current furnace-and-AC running cost near $811 a year, against 16.53¢ 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 $8,483 behind.
What would change Littleton's answer
The heat pump would become the cheaper option in Littleton if electricity fell to 12.5¢/kWh (from 16.53¢) or gas rose above $14.79 per Mcf (from $11.17). At today's prices a cheaper quote cannot rescue the gas comparison in Littleton, since there is no yearly saving to recover it from.
The other scenario: no gas furnace to begin with
Plenty of homes in Littleton heat with electricity alone, no gas line involved. Against electric-resistance heat, baseboard or an electric furnace, both 100% efficient but still just resistance, the case for switching gets stronger here. Switching saves about $1,397 a year here, a heat pump moving heat rather than generating it needs far less electricity than resistance coils, so the extra $10,000 spent up front comes back in about 7.2 years.
Where Littleton ranks in this dataset
Littleton lands at position 511 out of 3206 cities on heating severity (coldest is 1), and 918 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.
What to do with this number in Littleton
About 44,879 people live in Littleton, Colorado, 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.
Line up a few local HVAC quotes before you decide.
Reading further on this page's numbers
Nothing above is a black box: the methodology guide shows the full arithmetic behind Littleton's 2.51 seasonal COP and payback figure. At a -8°F design temperature, Littleton sits in cold-climate territory; the guide to that class of unit explains why.