St. John, IN: the heat pump payback math

In St. John, 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. Running costs here land $174 a year HIGHER than the furnace it replaces, so that premium is never recovered. That's St. John's own climate and rates talking, not a hedge or a caveat.

How cold St. John actually gets

Degree days tell the story here: St. John racks up 4971 heating degree days each year (base 65°F), and summers add a moderate cooling load, with 864 cooling degree days on the cooling side. -5.3°F is the figure equipment gets sized against here — the 99th-percentile cold snap, not an average day — with a record low of -10.7°F on file. Worked through the model, that's a seasonal COP of 2.57 on the cold-climate unit fit for this climate. Below the 25°F line where a standard machine starts leaning on resistance backup, St. John sits firmly in cold-climate territory, so that's the class of unit priced here. These numbers come from LANSING MUNICIPAL AP, the closest NOAA station, 7.6 miles out.

St. John's running-cost comparison, in dollars

Electricity use for heating alone comes out to about 4,898 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $960 a year. St. John's gas rate of 11.49 per Mcf, applied to the 52 Mcf a year the furnace burns, puts its running cost near $786 a year, against 17.03¢ per kWh for electricity. Buy it outright, not incrementally, and payback stretches to beyond the 15-year equipment life; over 15 years the net position sits $6,110 behind.

The other scenario: no gas furnace to begin with

Not every home in St. John has gas service. Swap the comparison to resistance heat instead of gas, and St. John's answer improves. 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.

How St. John compares nationally

Among 3206 cities, St. John's winter puts it at rank 763 for severity, while its size puts it at rank 1651 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 24,250 people in St. John

St. John, Indiana is home to about 24,250 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 St. John, nothing is lost by holding off until the current equipment genuinely fails.

Get quotes from local HVAC contractors before deciding.

Where St. John's figure comes from

The methodology guide walks through exactly how St. John's 2.57 seasonal COP and the rest of this page's numbers get built. St. John's -5.3°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.