Heat Pump Payback in Plainfield, IN
Will a heat pump pay off in Plainfield, IN?
Plainfield is a place where a heat pump genuinely costs more to operate than the alternative. $5,500 is what Plainfield would pay extra to go electric rather than replace the furnace and AC with the same again. Unfortunately the electric bill outweighs the gas bill it replaces by about $80 a year here, so the extra spend stays unrecovered. There's no spin on that: Plainfield's numbers say wait.
Not the city you meant?
Plainfield is one of 3206 cities covered here, each run through the same model. Search another below.
The climate behind Plainfield's payback figure
4285 heating degree days pile up here every year, so Plainfield has a real but manageable winter; the cooling side runs to 1278 cooling degree days, where summers are hot enough that cooling matters as much as heating. -0.9°F is the figure equipment gets sized against here, the 99th-percentile cold snap, not an average day, with a low of -6°F in the 2024 station record. Worked through the model, that's a seasonal COP of 2.68 on the cold-climate unit fit for this climate. Below the 25°F line where a standard machine starts leaning on resistance backup, Plainfield sits firmly in cold-climate territory, so that's the class of unit priced here. Climate figures trace to the nearest NOAA station, Indianapolis International Ai, 5.3 miles from Plainfield.
Plainfield's running-cost comparison, in dollars
Electricity use for heating alone comes out to about 4,049 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $875 a year. Plainfield's gas rate of $11.49 per Mcf, applied to the 45 Mcf a year the furnace burns, puts the current furnace-and-AC running cost near $795 a year, against 17.03¢ per kWh for electricity. With running costs higher every year, there is no payback at any purchase price; over 15 years, against a like-for-like replacement, a household here would end $6,703 behind.
How sensitive Plainfield's result is to prices
The heat pump would become the cheaper option in Plainfield if electricity fell to 14.7¢/kWh (from 17.03¢) or gas rose above $13.29 per Mcf (from $11.49). At today's prices a cheaper quote cannot rescue the gas comparison in Plainfield, since there is no yearly saving to recover it from.
If your home heats with electric baseboard instead of gas
Plenty of homes in Plainfield heat with electricity alone, no gas line involved. Compared with baseboard or electric-furnace resistance heat, the numbers shift in the heat pump’s favor. About $1,255 a year comes back this way, enough that the 8-year payback clears the $10,000 premium comfortably within the equipment's life.
Plainfield against the rest of the country
Ranked against the other 3206 cities covered, Plainfield comes in at 1346 for heating severity, 1 would be the coldest place in the dataset, and 1099 by population, where 1 is largest. That's the middle third for winter severity among the cities covered here.
What to do with this number in Plainfield
About 37,796 people live in Plainfield, Indiana, and every number on this page is what a contractor would actually work from when quoting a system here, the point isn't to replace that quote, it's to tell you whether to bother asking for one. Here, there's no cost penalty to waiting until your current furnace or AC actually needs replacing.
Ask a local HVAC contractor for a quote before committing either way.
Where Plainfield's figure comes from
The methodology guide walks through exactly how Plainfield's 2.68 seasonal COP and the rest of this page's numbers get built. At a -0.9°F design temperature, Plainfield sits in cold-climate territory; the guide to that class of unit explains why.