Griffith, IN: the heat pump payback math
Here in Griffith, the honest answer is that a heat pump raises your annual running cost. 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. Running costs here land $174 a year HIGHER than the furnace it replaces, so that premium is never recovered. That's Griffith's own climate and rates talking, not a hedge or a caveat.
Griffith's weather, in the numbers that matter
4971 heating degree days pile up here every year, so Griffith has a real but manageable winter; the cooling side runs to 864 cooling degree days, where summers add a moderate cooling load. Sizing runs off the design temperature, not the average day: -5.3°F here (record low -10.7°F), which works out to a seasonal COP of 2.57 for the cold-climate class of unit this climate calls for. Griffith 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 LANSING MUNICIPAL AP, the closest NOAA station, 5.7 miles out.
What it actually costs to run, year to year
A 2000-square-foot house here would pull roughly 4,898 heating kilowatt-hours annually on top of cooling, totalling about $960 a year on electricity. That compares with roughly 52 Mcf a year of gas at Griffith's 11.49 per-Mcf rate — about $786 a year — against a local electricity rate of 17.03¢/kWh. Priced as a standalone purchase rather than against a like-for-like replacement, equipment payback runs past the 15-year equipment life, for a 15-year net position $6,110 behind.
If your home heats with electric baseboard instead of gas
Gas isn't universal in Griffith — 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 $1,375 a year comes back this way, enough that the 5.8-year payback clears the $8,000 premium comfortably within the equipment's life.
Where Griffith ranks in this dataset
Among 3206 cities, Griffith's winter puts it at rank 778 for severity, while its size puts it at rank 2279 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.
Next step for 16,192 people in Griffith
Griffith, Indiana is home to about 16,192 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 Griffith, nothing is lost by holding off until the current equipment genuinely fails.
Get quotes from local HVAC contractors before deciding.
More on how this number was built
Every constant behind this page — the 2.57 seasonal COP, the degree-day corrections, the equipment costs — is documented in the methodology guide. Griffith's -5.3°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.