Norman, OK: the heat pump payback math
Norman technically pencils out, but only past the point the equipment would need replacing anyway. 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. That premium is recovered through $225 of lower running costs every year, landing the payback clock at roughly 15.5 years. Norman's own numbers say this pencils out only in theory, not in practice.
Why Norman's climate drives this number
2787 heating degree days pile up here every year, so Norman has a mild winter by US standards; the cooling side runs to 2356 cooling degree days, where summers are hot enough that cooling matters as much as heating. 8.6°F is the figure equipment gets sized against here — the 99th-percentile cold snap, not an average day — with a record low of 0.9°F on file. Worked through the model, that's a seasonal COP of 2.91 on the cold-climate unit fit for this climate. Below the 25°F line where a standard machine starts leaning on resistance backup, Norman sits firmly in cold-climate territory, so that's the class of unit priced here. Source: NOAA station UNIVERSITY OF OKLAHOMA WESTHE, 6.9 miles from Norman — the closest one on record.
What it actually costs to run, year to year
A 2000-square-foot house here would pull roughly 2,425 heating kilowatt-hours annually on top of cooling, totalling about $581 a year on electricity. Norman's gas rate of 13.99 per Mcf, applied to the 29 Mcf a year the furnace burns, puts its running cost near $806 a year, against 13.10¢ per kWh for electricity. Looked at as a full purchase rather than an incremental one, payback here is roughly 59.9 years, leaving the 15-year total $122 behind.
The other scenario: no gas furnace to begin with
Gas isn't universal in Norman — many houses run on electric heat already. Compared with baseboard or electric-furnace resistance heat, the numbers shift in the heat pump’s favor. About $744 a year comes back this way, enough that the 10.8-year payback clears the $8,000 premium comfortably within the equipment's life.
Norman against the rest of the country
Norman lands at position 2009 out of 3206 cities on heating severity (coldest is 1), and 221 out of 3206 by population size (biggest is 1). That's the middle third for winter severity among the cities covered here.
What to do with this number in Norman
About 131,010 people live in Norman, 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.
Line up a few local HVAC quotes before you decide.
Reading further on this page's numbers
Every constant behind this page — the 2.91 seasonal COP, the degree-day corrections, the equipment costs — is documented in the methodology guide. Norman's 8.6°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.