Will a heat pump pay off in Spencer, IA?
In Spencer, a heat pump would cost more to run each year than what you have now. Against a like-for-like gas furnace and AC swap, going electric costs $3,500 more up front here (already netting out a $2,000 tax credit). The heat pump would cost about $133 more a year to run than the furnace it replaces — a premium with no payback. That's Spencer's own climate and rates talking, not a hedge or a caveat.
Spencer's weather, in the numbers that matter
Degree days tell the story here: Spencer racks up 5958 heating degree days each year (base 65°F), and summers add a moderate cooling load, with 828 cooling degree days on the cooling side. Sizing runs off the design temperature, not the average day: -13°F here (record low -20.9°F), which works out to a seasonal COP of 2.39 for the cold-climate class of unit this climate calls for. Below the 25°F line where a standard machine starts leaning on resistance backup, Spencer sits firmly in cold-climate territory, so that's the class of unit priced here. Climate figures trace to the nearest NOAA station, SPENCER MUNICIPAL AIRPORT, 2.7 miles from Spencer.
The month-to-month numbers for Spencer
A 2000-square-foot house here would pull roughly 6,312 heating kilowatt-hours annually on top of cooling, totalling about $934 a year on electricity. That compares with roughly 62 Mcf a year of gas at Spencer's 10.61 per-Mcf rate — about $801 a year — against a local electricity rate of 13.31¢/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 $5,494 behind.
The other scenario: no gas furnace to begin with
Plenty of homes in Spencer heat with electricity alone, no gas line involved. Swap the comparison to resistance heat instead of gas, and Spencer's answer improves. About $1,217 a year comes back this way, enough that the 6.6-year payback clears the $8,000 premium comfortably within the equipment's life.
Where Spencer ranks in this dataset
Among 3206 cities, Spencer's winter puts it at rank 254 for severity, while its size puts it at rank 2911 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.
What to do with this number in Spencer
Spencer, Iowa is home to about 11,418 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 Spencer, nothing is lost by holding off until the current equipment genuinely fails.
Ask a local HVAC contractor for a quote before committing either way.
Where Spencer's figure comes from
Every constant behind this page — the 2.39 seasonal COP, the degree-day corrections, the equipment costs — is documented in the methodology guide. Spencer's -13°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.