Heat pump vs. gas furnace in Merrillville, IN
Here in Merrillville, the honest answer is that a heat pump raises your annual running cost. $3,500 is what Merrillville would pay extra to go electric rather than replace the furnace and AC with the same again, once the $2,000 federal credit is applied. Running costs here land $120 a year HIGHER than the furnace it replaces, so that premium is never recovered. That's Merrillville's own climate and rates talking, not a hedge or a caveat.
Merrillville's weather, in the numbers that matter
Merrillville has a real but manageable winter — 4836 heating degree days a year against a 65°F base — and summers are hot enough that cooling matters as much as heating, at 1011 cooling degree days. The 99% winter design temperature here — the cold snap equipment must be sized for, not the seasonal average — is -0.4°F, against a record low of -9.4°F. That puts the seasonal coefficient of performance at 2.69 for the recommended cold-climate unit. Below the 25°F line where a standard machine starts leaning on resistance backup, Merrillville sits firmly in cold-climate territory, so that's the class of unit priced here. Source: NOAA station GARY/CHICAGO AIRPORT, 11.2 miles from Merrillville — 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 4,552 kWh a year to keep it warm, plus cooling, for a combined electric bill near $922 a year. That compares with roughly 50 Mcf a year of gas at Merrillville's 11.49 per-Mcf rate — about $802 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 $5,303 behind.
The other scenario: no gas furnace to begin with
Gas isn't universal in Merrillville — 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. Switching saves about $1,386 a year here — a heat pump moving heat rather than generating it needs far less electricity than resistance coils — so the extra $8,000 spent up front comes back in about 5.8 years.
How Merrillville compares nationally
Merrillville lands at position 933 out of 3206 cities on heating severity (coldest is 1), and 1124 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 for 36,989 people in Merrillville
Merrillville, Indiana is home to about 36,989 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 Merrillville, 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
Nothing above is a black box: the methodology guide shows the full arithmetic behind Merrillville's 2.69 seasonal COP and payback figure. Merrillville's -0.4°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.