Will a heat pump pay off in Marshalltown, IA?

In Marshalltown, a heat pump would cost more to run each year than what you have now. $3,500 is what Marshalltown 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 $94 a year HIGHER than the furnace it replaces, so that premium is never recovered. That's Marshalltown's own climate and rates talking, not a hedge or a caveat.

How cold Marshalltown actually gets

Degree days tell the story here: Marshalltown racks up 5540 heating degree days each year (base 65°F), and summers add a moderate cooling load, with 894 cooling degree days on the cooling side. Sizing runs off the design temperature, not the average day: -9.9°F here (record low -17°F), which works out to a seasonal COP of 2.46 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, Marshalltown sits firmly in cold-climate territory, so that's the class of unit priced here. These numbers come from MARSHALLTOWN MUNICIPAL APT, the closest NOAA station, 5.3 miles out.

The month-to-month numbers for Marshalltown

Modelled on a typical 2000-square-foot house, the heat pump draws about 5,702 kWh a year to keep it warm, plus cooling, for a combined electric bill near $860 a year. That compares with roughly 58 Mcf a year of gas at Marshalltown's 10.61 per-Mcf rate — about $766 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 $4,911 behind.

Electric resistance heat in Marshalltown, compared

Gas isn't universal in Marshalltown — many houses run on electric heat already. Compared with baseboard or electric-furnace resistance heat, the numbers shift in the heat pump’s favor. Switching saves about $1,161 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 6.9 years.

How Marshalltown compares nationally

Among 3206 cities, Marshalltown's winter puts it at rank 349 for severity, while its size puts it at rank 1435 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.

Deciding what's next in Marshalltown, IA

Marshalltown, Iowa is home to about 27,886 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 Marshalltown, 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 Marshalltown's figure comes from

Nothing above is a black box: the methodology guide shows the full arithmetic behind Marshalltown's 2.46 seasonal COP and payback figure. At a -9.9°F design temperature, Marshalltown sits in cold-climate territory; the guide to that class of unit explains why.