Heat Pump Payback in South Houston, TX
Should South Houston switch to a heat pump?
This one's marginal in South Houston: it only clears if you stay long enough. $3,000 is what South Houston would pay extra to go electric rather than replace the furnace and AC with the same again. Lower bills claw that back: about $329 saved annually, for a payback of roughly 9.1 years. It's a genuine toss-up here, South Houston's numbers don't point clearly either way.
Compare against another city
Landed on South Houston by mistake, or want to compare it against somewhere else? Search the other 3206 cities below.
How cold South Houston actually gets
South Houston barely has a winter to speak of, 722 heating degree days a year against a 65°F base, and summers are severe enough that cooling can dominate the annual bill, at 3867 cooling degree days. The 99% winter design temperature here, the cold snap equipment must be sized for, not the seasonal average, is 32°F, and the coldest daily reading in the 2024 station record was 19.9°F. That puts the seasonal coefficient of performance at 3.15 for the recommended standard unit. South Houston's winters don't get cold enough to need the cold-climate premium, a standard unit holds up fine. Source: NOAA station William P. Hobby Airport, 3.6 miles from South Houston, the closest one on record.
The yearly running costs in South Houston
Modelled on a typical 2000-square-foot house, the heat pump draws about 580 kWh a year to keep it warm, plus cooling, for a combined electric bill near $626 a year. The gas furnace it replaces burns roughly 8 Mcf a year at $19.42 per Mcf here, for a running cost near $955 a year including the old AC (electricity here runs 16.15¢/kWh). Priced as a standalone purchase, with a working furnace ripped out early, payback would take longer than the 15-year equipment life. Measured against the like-for-like replacement instead, a household here ends 15 years $1,938 ahead.
How sensitive South Houston's result is to prices
In South Houston the cooling savings outweigh the extra electricity for heating, so no plausible change in the electricity rate would make the old furnace and AC cheaper to run. A useful quote test for South Houston: the heat pump is worth it within a decade if it costs less than $3,290 more than replacing the furnace and AC, and within 7 years if the gap is under $2,303.
If your home heats with electric baseboard instead of gas
Plenty of homes in South Houston heat with electricity alone, no gas line involved. Against electric-resistance heat, baseboard or an electric furnace, both 100% efficient but still just resistance, the case for switching gets stronger here. The gap still doesn't close: the $7,500 incremental cost outlasts the 15-year equipment life here even against resistance heat.
Where South Houston ranks in this dataset
Ranked against the other 3206 cities covered, South Houston comes in at 2985 for heating severity, 1 would be the coldest place in the dataset, and 2282 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.
Next step if you live in South Houston
South Houston, Texas is home to about 16,146 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 South Houston, 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 South Houston's figure comes from
Nothing above is a black box: the methodology guide shows the full arithmetic behind South Houston's 3.15 seasonal COP and payback figure. Homes in South Houston without gas service should read the electric-resistance comparison instead, the numbers there differ from the gas case above.