Heat Pump Payback in Auburn, ME
Will a heat pump pay off in Auburn, ME?
Auburn is a place where a heat pump genuinely costs more to operate than the alternative. Against a like-for-like gas furnace and AC swap, going electric costs $5,500 more up front here. The heat pump would cost about $475 more a year to run than the furnace it replaces, a premium with no payback. There's no spin on that: Auburn's numbers say wait.
Compare against another city
This runs the same numbers for 3206 US cities, not just Auburn. Look one up here.
The climate behind Auburn's payback figure
Degree days tell the story here: Auburn racks up 6483 heating degree days each year (base 65°F), and summers add a moderate cooling load, with 384 cooling degree days on the cooling side. Sizing runs off the design temperature, not the average day: 0°F here (coldest 2024 reading -0.9°F), which works out to a seasonal COP of 2.7 for the cold-climate class of unit this climate calls for. Auburn 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, Auburn/Lewiston Municipal Airport, 2.9 miles from Auburn.
Auburn's running-cost comparison, in dollars
Electricity use for heating alone comes out to about 6,080 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $1,902 a year. Auburn's gas rate of $18.95 per Mcf, applied to the 68 Mcf a year the furnace burns, puts the current furnace-and-AC running cost near $1,427 a year, against 29.68¢ 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 $12,618 behind.
The break-even point in Auburn
The heat pump would become the cheaper option in Auburn if electricity fell to 21.7¢/kWh (from 29.68¢) or gas rose above $25.98 per Mcf (from $18.95). At today's prices a cheaper quote cannot rescue the gas comparison in Auburn, since there is no yearly saving to recover it from.
Electric resistance heat in Auburn, compared
Gas isn't universal in Auburn, many houses run on electric heat already. 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 $3,118 a year, which recovers the extra $10,000 spent going electric in roughly 3.2 years.
Where Auburn ranks in this dataset
Auburn lands at position 92 out of 3206 cities on heating severity (coldest is 1), and 1591 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 Auburn
About 25,200 people live in Auburn, Maine, 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.
Where Auburn's figure comes from
The methodology guide walks through exactly how Auburn's 2.7 seasonal COP and the rest of this page's numbers get built. Auburn's 0°F design temperature is below the 25°F line, which is why a cold-climate unit is the right call here, see what that changes in the cold-climate unit guide.