Heat Pump Payback in San Juan, TX
Will a heat pump pay off in San Juan, TX?
A heat pump earns back its extra cost in San Juan within a sensible timeframe. Against a like-for-like gas furnace and AC swap, going electric costs $3,000 more up front here. That premium is recovered through $381 of lower running costs every year, landing the payback clock at roughly 7.9 years. That's a real payback, built from San Juan's own climate and utility rates, not a national guess.
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Why San Juan's climate drives this number
San Juan barely has a winter to speak of, 319 heating degree days a year against a 65°F base, and summers are severe enough that cooling can dominate the annual bill, at 4957 cooling degree days. 39°F is the figure equipment gets sized against here, the 99th-percentile cold snap, not an average day, with a low of 27°F in the 2024 station record. Worked through the model, that's a seasonal COP of 3.36 on the standard unit fit for this climate. A standard ducted system is enough here; San Juan's design temperature doesn't justify the cold-climate premium. These numbers come from Mc Allen Miller International Airport, the closest NOAA station, 6.3 miles out.
San Juan's running-cost comparison, in dollars
Heating hardly figures in San Juan: on a 2000-square-foot reference house the heat pump's roughly $721 yearly electric bill is nearly all cooling. With so little heating demand, a furnace in San Juan would burn only about 3 Mcf a year ($19.42 per Mcf); almost all of the $1,102 yearly running cost of the current system is cooling, at 16.15¢/kWh. Any saving here is really a cooling-efficiency saving. 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 $2,710 ahead.
What would change San Juan's answer
Because the heat pump's better air conditioning saves more electricity than its heating uses, it stays cheaper to run than the current furnace and AC in San Juan at any electricity price. When quotes arrive, compare the heat pump price with a like-for-like furnace and AC replacement: at $381 a year saved, a difference under $2,667 pays back within 7 years here, and under $3,810 within 10.
Electric resistance heat in San Juan, compared
Plenty of homes in San Juan heat with electricity alone, no gas line involved. Swap the comparison to resistance heat instead of gas, and San Juan's answer improves. Even against resistance heat, the running-cost gap here isn't enough to clear the $7,500 incremental cost within the equipment's 15-year life.
How San Juan compares nationally
San Juan lands at position 3116 out of 3206 cities on heating severity (coldest is 1), and 1113 out of 3206 by population size (biggest is 1). 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 San Juan
About 37,341 people live in San Juan, 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, it's worth getting quotes before your current system fails, not after.
Get quotes from local HVAC contractors before deciding.
More on how this number was built
Every constant behind this page, the 3.36 seasonal COP, the degree-day corrections, the equipment costs, is documented in the methodology guide. Not every home in San Juan has gas; the guide comparing a heat pump against electric baseboard covers that case separately.