Heat Pump Payback in Sherman, TX
Sherman, TX: the heat pump payback math
In Sherman, 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 $5,500 more up front here. Sherman's residents would see roughly $348 a year back in running costs, putting the payback around 15.8 years. That's a technicality, not a recommendation, for anyone actually living in Sherman.
Compare against another city
Sherman is one of 3206 cities covered here, each run through the same model. Search another below.
Sherman's weather, in the numbers that matter
Sherman has a mild winter by US standards, 2068 heating degree days a year against a 65°F base, and summers are severe enough that cooling can dominate the annual bill, at 2893 cooling degree days. Sizing runs off the design temperature, not the average day: 14.4°F here (coldest 2024 reading 8.6°F), which works out to a seasonal COP of 3.05 for the cold-climate class of unit this climate calls for. Mild on average, but the occasional cold snap is what sizes the equipment: at a 14.4°F design temperature Sherman falls just under the 25°F line where a standard heat pump starts leaning on resistance backup, so the model prices a cold-climate unit to be safe. Source: NOAA station Grayson County Airport, 6.5 miles from Sherman, the closest one on record.
What it actually costs to run, year to year
Electricity use for heating alone comes out to about 1,717 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $676 a year. That compares with roughly 22 Mcf a year of gas at Sherman's $19.42 per-Mcf rate, about $1,024 a year with the old AC included, against a local electricity rate of 16.15¢/kWh. If the current system still worked and you replaced it anyway, the full cost would take longer than the 15-year equipment life to earn back; against buying a new furnace and AC regardless, the 15-year total lands $278 behind.
How sensitive Sherman's result is to prices
Gas would only overtake the heat pump in Sherman if electricity rose past 96.3¢/kWh from 16.15¢, or gas fell under $3.26 per Mcf from $19.42. A useful quote test for Sherman: the heat pump is worth it within a decade if it costs less than $3,480 more than replacing the furnace and AC, and within 7 years if the gap is under $2,436.
Electric resistance heat in Sherman, compared
Not every home in Sherman has gas service. Swap the comparison to resistance heat instead of gas, and Sherman's answer improves. The saving here runs about $776 a year, which recovers the extra $10,000 spent going electric in roughly 12.9 years.
How Sherman compares nationally
Ranked against the other 3206 cities covered, Sherman comes in at 2402 for heating severity, 1 would be the coldest place in the dataset, and 814 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 Sherman
Sherman, Texas is home to about 50,229 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 Sherman, 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 Sherman's 3.05 seasonal COP and payback figure. Sherman's 14.4°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.