Heat Pump Payback in Granbury, TX
Granbury, TX: the heat pump payback math
In Granbury, the extra upfront cost technically comes back, just not before the equipment wears out. $5,500 is what Granbury would pay extra to go electric rather than replace the furnace and AC with the same again. Lower bills claw that back: about $317 saved annually, for a payback of roughly 17.3 years. That's a technicality, not a recommendation, for anyone actually living in Granbury.
Checking a different city
This runs the same numbers for 3206 US cities, not just Granbury. Look one up here.
Granbury's weather, in the numbers that matter
Degree days tell the story here: Granbury racks up 1866 heating degree days each year (base 65°F), and summers are severe enough that cooling can dominate the annual bill, with 2667 cooling degree days on the cooling side. 14°F is the figure equipment gets sized against here, the 99th-percentile cold snap, not an average day, with a low of 9.9°F in the 2024 station record. Worked through the model, that's a seasonal COP of 3.04 on the cold-climate unit fit for this climate. Mild on average, but the occasional cold snap is what sizes the equipment: at a 14°F design temperature Granbury 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 Clark Field Municipal Airport, 27.9 miles from Granbury, the closest one on record.
Granbury's running-cost comparison, in dollars
A 2000-square-foot house here would pull roughly 1,554 heating kilowatt-hours annually on top of cooling, totalling about $618 a year on electricity. That compares with roughly 19 Mcf a year of gas at Granbury's $19.42 per-Mcf rate, about $936 a year with the old AC included, against a local electricity rate of 16.15¢/kWh. Buying outright rather than at replacement time stretches payback to longer than the 15-year equipment life. Over 15 years, compared with a like-for-like replacement, the heat pump leaves you $740 behind.
What would change Granbury's answer
Gas would only overtake the heat pump in Granbury if electricity rose past 101.5¢/kWh from 16.15¢, or gas fell under $3.09 per Mcf from $19.42. A useful quote test for Granbury: the heat pump is worth it within a decade if it costs less than $3,170 more than replacing the furnace and AC, and within 7 years if the gap is under $2,219.
Electric resistance heat in Granbury, compared
Gas isn't universal in Granbury, many houses run on electric heat already. Compared with baseboard or electric-furnace resistance heat, the numbers shift in the heat pump’s favor. The saving here runs about $703 a year, which recovers the extra $10,000 spent going electric in roughly 14.2 years.
Granbury against the rest of the country
Among 3206 cities, Granbury's winter puts it at rank 2498 for severity, while its size puts it at rank 2662 for population, 1 in both cases being the extreme. That's the mildest third of cities covered, where utility rates carry more of the answer than climate does.
Deciding what's next in Granbury, TX
Granbury, Texas is home to about 12,934 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 Granbury, nothing is lost by holding off until the current equipment genuinely fails.
Get quotes from local HVAC contractors before deciding.
Where Granbury's figure comes from
Nothing above is a black box: the methodology guide shows the full arithmetic behind Granbury's 3.04 seasonal COP and payback figure. Granbury's 14°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.