Should Sioux City switch to a heat pump?
Sioux City is a place where a heat pump genuinely costs more to operate than the alternative. $3,500 is what Sioux City 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. Unfortunately the electric bill outweighs the gas bill it replaces by about $143 a year here, so the extra spend stays unrecovered. That's Sioux City's own climate and rates talking, not a hedge or a caveat.
Sioux City's weather, in the numbers that matter
Degree days tell the story here: Sioux City racks up 5768 heating degree days each year (base 65°F), and summers add a moderate cooling load, with 858 cooling degree days on the cooling side. -15°F is the figure equipment gets sized against here — the 99th-percentile cold snap, not an average day — with a record low of -20°F on file. Worked through the model, that's a seasonal COP of 2.34 on the cold-climate unit fit for this climate. Sioux City needs the cold-climate class of unit: past a 25°F design temperature a standard heat pump falls back on resistance backup often enough to eat the savings. Climate figures trace to the nearest NOAA station, SIOUX GATEWAY/COL BUD DAY FIE, 7.2 miles from Sioux City.
Sioux City's running-cost comparison, in dollars
A 2000-square-foot house here would pull roughly 6,242 heating kilowatt-hours annually on top of cooling, totalling about $928 a year on electricity. Sioux City's gas rate of 10.61 per Mcf, applied to the 60 Mcf a year the furnace burns, puts its running cost near $785 a year, against 13.31¢ per kWh for electricity. Looked at as a full purchase rather than an incremental one, payback here is longer than the 15-year equipment life, leaving the 15-year total $5,641 behind.
Electric resistance heat in Sioux City, compared
Plenty of homes in Sioux City 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. Switching saves about $1,164 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.
Sioux City against the rest of the country
Ranked against the other 3206 cities covered, Sioux City comes in at 294 for heating severity — 1 would be the coldest place in the dataset — and 414 by population, where 1 is largest. That's the coldest third of the dataset, where climate does most of the work behind this figure.
Next step for 86,875 people in Sioux City
Sioux City, Iowa is home to about 86,875 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 Sioux City, nothing is lost by holding off until the current equipment genuinely fails.
Ask a local HVAC contractor for a quote before committing either way.
Reading further on this page's numbers
Nothing above is a black box: the methodology guide shows the full arithmetic behind Sioux City's 2.34 seasonal COP and payback figure. At a -15°F design temperature, Sioux City sits in cold-climate territory; the guide to that class of unit explains why.