Heat Pump Payback in Farmington, MN
Will a heat pump pay off in Farmington, MN?
Farmington 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. Running costs here land $280 a year higher than the furnace it replaces, so that premium is never recovered. That's Farmington's own climate and rates talking, not a hedge or a caveat.
Checking a different city
This runs the same numbers for 3206 US cities, not just Farmington. Look one up here.
How cold Farmington actually gets
Farmington has a cold winter that leans hard on heating equipment, 6437 heating degree days a year against a 65°F base, and summers add a moderate cooling load, at 507 cooling degree days. -11.2°F is the figure equipment gets sized against here, the 99th-percentile cold snap, not an average day, with a low of -11.2°F in the 2024 station record. Worked through the model, that's a seasonal COP of 2.43 on the cold-climate unit fit for this climate. A cold-climate unit is the right call in Farmington, below 25°F design temperature, a standard heat pump leans hard on electric-resistance backup, which erases most of the savings. Source: NOAA station Airlake Airport, 3.6 miles from Farmington, the closest one on record.
What it actually costs to run, year to year
Modelled on a typical 2000-square-foot house, the heat pump draws about 6,708 kWh a year to keep it warm, plus cooling, for a combined electric bill near $1,119 a year. Farmington's gas rate of $10.98 per Mcf, applied to the 67 Mcf a year the furnace burns, puts the current furnace-and-AC running cost near $839 a year, against 15.67¢ per kWh for electricity. Because the heat pump costs more to run here, the gap only widens with time: $9,696 behind after 15 years compared with replacing the furnace and AC like-for-like.
How sensitive Farmington's result is to prices
For the verdict in Farmington to flip, electricity would need to drop to about 11.4¢/kWh from 15.67¢, or gas climb past $15.15 per Mcf from $10.98. A utility offering a lower heat pump rate can change this. Until then, no quote price makes a heat pump pay back against gas in Farmington; the case for one here rests on comfort, cooling, or replacing electric heat instead.
The other scenario: no gas furnace to begin with
Not every home in Farmington has gas service. Compared with baseboard or electric-furnace resistance heat, the numbers shift in the heat pump’s favor. Switching saves about $1,538 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 6.5 years.
How Farmington compares nationally
Among 3206 cities, Farmington's winter puts it at rank 98 for severity, while its size puts it at rank 1642 for population, 1 in both cases being the extreme. 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 Farmington
Farmington, Minnesota is home to about 24,464 people, and the figures above are the same ones a local HVAC contractor uses to size and quote a system, this site doesn't guess where a real quote would land, it just tells you whether it's worth asking for one. In Farmington, nothing is lost by holding off until the current equipment genuinely fails.
Line up a few local HVAC quotes before you decide.
Reading further on this page's numbers
The methodology guide walks through exactly how Farmington's 2.43 seasonal COP and the rest of this page's numbers get built. Farmington's -11.2°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.