Heat pump vs. gas furnace in Glendora, CA
In Glendora, a heat pump pays for itself within a reasonable window. 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. Lower bills claw that back: about $251 saved annually, for a payback of roughly 4 years. The window here is reasonable, and it's specific to what Glendora actually pays for power and gas.
How cold Glendora actually gets
Degree days tell the story here: Glendora racks up 1219 heating degree days each year (base 65°F), and summers are hot enough that cooling matters as much as heating, with 1906 cooling degree days on the cooling side. The 99% winter design temperature here — the cold snap equipment must be sized for, not the seasonal average — is 37.4°F, against a record low of 35.6°F. That puts the seasonal coefficient of performance at 3.31 for the recommended standard unit. Glendora's winters don't get cold enough to need the cold-climate premium — a standard unit holds up fine. Climate figures trace to the nearest NOAA station, BRACKETT FIELD AIRPORT, 4.8 miles from Glendora.
Glendora's running-cost comparison, in dollars
A 2000-square-foot house here would pull roughly 933 heating kilowatt-hours annually on top of cooling, totalling about $840 a year on electricity. That compares with roughly 13 Mcf a year of gas at Glendora's 22.01 per-Mcf rate — about $1,090 a year — against a local electricity rate of 32.83¢/kWh. Looked at as a full purchase rather than an incremental one, payback here is roughly 43.9 years, leaving the 15-year total $2,761 ahead.
If your home heats with electric baseboard instead of gas
Not every home in Glendora has gas service. Against electric-resistance heat — baseboard or an electric furnace, both 100% efficient but still just resistance — the case for switching gets stronger here. The saving here runs about $985 a year, which recovers the extra $5,500 spent going electric in roughly 5.6 years.
How Glendora compares nationally
Glendora lands at position 2789 out of 3206 cities on heating severity (coldest is 1), and 817 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.
What to do with this number in Glendora
Glendora, California is home to about 50,101 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. Given the math above, Glendora is a place worth lining up quotes ahead of a breakdown, not waiting for one.
Line up a few local HVAC quotes before you decide.
Where Glendora's figure comes from
The methodology guide walks through exactly how Glendora's 3.31 seasonal COP and the rest of this page's numbers get built. The $2,000 federal credit baked into Glendora's number is explained, with the before-and-after math, in the tax credit guide.