Will a heat pump pay off in Katy, TX?
In Katy, the math is close enough that it comes down to how long you plan to stay. 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). Lower bills claw that back: about $321 saved annually, for a payback of roughly 10.9 years. Whether that's worth it in Katy depends on how many years you expect to own the place.
Why Katy's climate drives this number
Katy barely has a winter to speak of — 960 heating degree days a year against a 65°F base — and summers are severe enough that cooling can dominate the annual bill, at 3429 cooling degree days. 24.8°F is the figure equipment gets sized against here — the 99th-percentile cold snap, not an average day — with a record low of 17.6°F on file. Worked through the model, that's a seasonal COP of 3.3 on the cold-climate unit fit for this climate. Below the 25°F line where a standard machine starts leaning on resistance backup, Katy sits firmly in cold-climate territory, so that's the class of unit priced here. Climate figures trace to the nearest NOAA station, HOUSTON EXECUTIVE AIRPORT, 3.6 miles from Katy.
The month-to-month numbers for Katy
Electricity use for heating alone comes out to about 737 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $591 a year. The gas furnace it replaces burns roughly 10 Mcf a year at 19.42 per Mcf here, for a running cost near $912 a year (electricity here runs 16.15¢/kWh). Looked at as a full purchase rather than an incremental one, payback here is roughly 42.1 years, leaving the 15-year total $1,311 ahead.
If your home heats with electric baseboard instead of gas
Not every home in Katy has gas service. Compared with baseboard or electric-furnace resistance heat, the numbers shift in the heat pump’s favor. The saving here runs about $519 a year, which recovers the extra $8,000 spent going electric in roughly 15.4 years.
Where Katy ranks in this dataset
Ranked against the other 3206 cities covered, Katy comes in at 2921 for heating severity — 1 would be the coldest place in the dataset — and 1443 by population, where 1 is largest. That's the mildest third of cities covered, where utility rates carry more of the answer than climate does.
What to do with this number in Katy
About 27,741 people live in Katy, Texas, 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.
More on how this number was built
Nothing above is a black box: the methodology guide shows the full arithmetic behind Katy's 3.3 seasonal COP and payback figure. Katy's 24.8°F design temperature is below the 25°F line, which is why a cold-climate unit is the right call here — see what that changes in the cold-climate unit guide.