Will a heat pump pay off in Duarte, CA?
A heat pump earns back its extra cost in Duarte within a sensible timeframe. Swap a failed furnace and AC for a heat pump rather than buying like-for-like, and the extra cost here runs $1,000 after a $2,000 federal tax credit. That premium is recovered through $323 of lower running costs every year, landing the payback clock at roughly 3.1 years. That's a real payback, built from Duarte's own climate and utility rates, not a national guess.
Why Duarte's climate drives this number
Degree days tell the story here: Duarte racks up 686 heating degree days each year (base 65°F), and summers are hot enough that cooling matters as much as heating, with 2300 cooling degree days on the cooling side. Sizing runs off the design temperature, not the average day: 39.2°F here (record low 37.4°F), which works out to a seasonal COP of 3.37 for the standard class of unit this climate calls for. A standard ducted system is enough here; Duarte's design temperature doesn't justify the cold-climate premium. Climate figures trace to the nearest NOAA station, EL MONTE AIRPORT, 7.2 miles from Duarte.
What it actually costs to run, year to year
Modelled on a typical 2000-square-foot house, the heat pump draws about 515 kWh a year to keep it warm, plus cooling, for a combined electric bill near $813 a year. Duarte's gas rate of 22.01 per Mcf, applied to the 7 Mcf a year the furnace burns, puts its running cost near $1,136 a year, against 32.83¢ per kWh for electricity. Priced as a standalone purchase rather than against a like-for-like replacement, equipment payback runs about 34.1 years, for a 15-year net position $3,842 ahead.
Electric resistance heat in Duarte, compared
Not every home in Duarte has gas service. Compared with baseboard or electric-furnace resistance heat, the numbers shift in the heat pump’s favor. About $736 a year comes back this way, enough that the 7.5-year payback clears the $5,500 premium comfortably within the equipment's life.
How Duarte compares nationally
Duarte lands at position 3010 out of 3206 cities on heating severity (coldest is 1), and 1688 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 for 23,493 people in Duarte
About 23,493 people live in Duarte, California, 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 3.37 seasonal COP, the degree-day corrections, the equipment costs — is documented in the methodology guide. See what Duarte's figure looks like without the $2,000 federal credit in the guide to how that credit moves the payback window.