Chickasha, OK: the heat pump payback math
In Chickasha, the extra upfront cost technically comes back, just not before the equipment wears out. 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). Chickasha's residents would see roughly $232 a year back in running costs, putting the payback around 15.1 years. Chickasha's own numbers say this pencils out only in theory, not in practice.
Why Chickasha's climate drives this number
Chickasha has a mild winter by US standards — 2952 heating degree days a year against a 65°F base — and summers are hot enough that cooling matters as much as heating, at 2378 cooling degree days. Sizing runs off the design temperature, not the average day: 8.8°F here (record low 1.4°F), which works out to a seasonal COP of 2.91 for the cold-climate class of unit this climate calls for. Chickasha 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. Source: NOAA station CHICKASHA MUNICIPAL ARPT, 4 miles from Chickasha — the closest one on record.
The month-to-month numbers for Chickasha
Modelled on a typical 2000-square-foot house, the heat pump draws about 2,569 kWh a year to keep it warm, plus cooling, for a combined electric bill near $602 a year. That compares with roughly 31 Mcf a year of gas at Chickasha's 13.99 per-Mcf rate — about $834 a year — against a local electricity rate of 13.10¢/kWh. Looked at as a full purchase rather than an incremental one, payback here is roughly 58.3 years, leaving the 15-year total $24 behind.
Electric resistance heat in Chickasha, compared
Plenty of homes in Chickasha heat with electricity alone, no gas line involved. Swap the comparison to resistance heat instead of gas, and Chickasha's answer improves. About $781 a year comes back this way, enough that the 10.2-year payback clears the $8,000 premium comfortably within the equipment's life.
Chickasha against the rest of the country
Chickasha lands at position 1947 out of 3206 cities on heating severity (coldest is 1), and 2193 out of 3206 by population size (biggest is 1). That's the middle third for winter severity among the cities covered here.
Deciding what's next in Chickasha, OK
About 17,014 people live in Chickasha, Oklahoma, 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.
Reading further on this page's numbers
Nothing above is a black box: the methodology guide shows the full arithmetic behind Chickasha's 2.91 seasonal COP and payback figure. Chickasha's 8.8°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.