Heat Pump Payback in Vermillion, SD
Should Vermillion switch to a heat pump?
In Vermillion, a heat pump would cost more to run each year than what you have now. $5,500 is what Vermillion would pay extra to go electric rather than replace the furnace and AC with the same again. Running costs here land $230 a year higher than the furnace it replaces, so that premium is never recovered. That's Vermillion's own climate and rates talking, not a hedge or a caveat.
Checking a different city
Vermillion is one of 3206 cities covered here, each run through the same model. Search another below.
Vermillion's weather, in the numbers that matter
Vermillion has a cold winter that leans hard on heating equipment, 6007 heating degree days a year against a 65°F base, and summers add a moderate cooling load, at 853 cooling degree days. The 99% winter design temperature here, the cold snap equipment must be sized for, not the seasonal average, is -13°F, and the coldest daily reading in the 2024 station record was -18.9°F. That puts the seasonal coefficient of performance at 2.39 for the recommended cold-climate unit. Vermillion 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 Chan Gurney Municipal Airport, the closest NOAA station, 23.2 miles out.
The yearly running costs in Vermillion
Modelled on a typical 2000-square-foot house, the heat pump draws about 6,364 kWh a year to keep it warm, plus cooling, for a combined electric bill near $1,003 a year. Vermillion's gas rate of $9.86 per Mcf, applied to the 63 Mcf a year the furnace burns, puts the current furnace-and-AC running cost near $773 a year, against 14.15¢ per kWh for electricity. Because the heat pump costs more to run here, the gap only widens with time: $8,953 behind after 15 years compared with replacing the furnace and AC like-for-like.
What would change Vermillion's answer
For the verdict in Vermillion to flip, electricity would need to drop to about 10.3¢/kWh from 14.15¢, or gas climb past $13.54 per Mcf from $9.86. 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 Vermillion; the case for one here rests on comfort, cooling, or replacing electric heat instead.
The other scenario: no gas furnace to begin with
Gas isn't universal in Vermillion, many houses run on electric heat already. Swap the comparison to resistance heat instead of gas, and Vermillion's answer improves. About $1,305 a year comes back this way, enough that the 7.7-year payback clears the $10,000 premium comfortably within the equipment's life.
Vermillion against the rest of the country
Ranked against the other 3206 cities covered, Vermillion comes in at 229 for heating severity, 1 would be the coldest place in the dataset, and 2828 by population, where 1 is largest. That's the coldest third of the dataset, where climate does most of the work behind this figure.
Next step if you live in Vermillion
Vermillion, South Dakota is home to about 11,877 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 Vermillion, nothing is lost by holding off until the current equipment genuinely fails.
Line up a few local HVAC quotes before you decide.
Where Vermillion's figure comes from
The methodology guide walks through exactly how Vermillion's 2.39 seasonal COP and the rest of this page's numbers get built. Vermillion's -13°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.