Should Greenville switch to a heat pump?
In Greenville, 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 $3,500 after a $2,000 federal tax credit. The heat pump would cost about $30 more a year to run than the furnace it replaces — a premium with no payback. That's Greenville's own climate and rates talking, not a hedge or a caveat.
How cold Greenville actually gets
4586 heating degree days pile up here every year, so Greenville has a real but manageable winter; the cooling side runs to 951 cooling degree days, where summers add a moderate cooling load. The 99% winter design temperature here — the cold snap equipment must be sized for, not the seasonal average — is 3.2°F, against a record low of -4°F. That puts the seasonal coefficient of performance at 2.78 for the recommended cold-climate unit. Greenville 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 DARKE COUNTY AIRPORT, the closest NOAA station, 8.3 miles out.
The month-to-month numbers for Greenville
A 2000-square-foot house here would pull roughly 4,177 heating kilowatt-hours annually on top of cooling, totalling about $918 a year on electricity. Greenville's gas rate of 13.85 per Mcf, applied to the 48 Mcf a year the furnace burns, puts its running cost near $888 a year, against 18.40¢ per kWh for electricity. Looked at as a full purchase rather than an incremental one, payback here is longer than the 15-year equipment life, leaving the 15-year total $3,943 behind.
If your home heats with electric baseboard instead of gas
Gas isn't universal in Greenville — 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. About $1,446 a year comes back this way, enough that the 5.5-year payback clears the $8,000 premium comfortably within the equipment's life.
How Greenville compares nationally
Among 3206 cities, Greenville's winter puts it at rank 1110 for severity, while its size puts it at rank 2698 for population — 1 in both cases being the extreme. That's the middle third for winter severity among the cities covered here.
Next step for 12,701 people in Greenville
Greenville, Ohio is home to about 12,701 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 Greenville, nothing is lost by holding off until the current equipment genuinely fails.
Line up a few local HVAC quotes before you decide.
More on how this number was built
Nothing above is a black box: the methodology guide shows the full arithmetic behind Greenville's 2.78 seasonal COP and payback figure. At a 3.2°F design temperature, Greenville sits in cold-climate territory; the guide to that class of unit explains why.