Will a heat pump pay off in Folsom, CA?
Folsom clears a genuine payback here, inside a reasonable stretch of years. $1,000 is what Folsom would pay extra to go electric rather than replace the furnace and AC with the same again, once the $2,000 federal credit is applied. Lower bills claw that back: about $149 saved annually, for a payback of roughly 6.7 years. The window here is reasonable, and it's specific to what Folsom actually pays for power and gas.
Folsom's weather, in the numbers that matter
Folsom has a mild winter by US standards — 2450 heating degree days a year against a 65°F base — and summers are hot enough that cooling matters as much as heating, at 1605 cooling degree days. The 99% winter design temperature here — the cold snap equipment must be sized for, not the seasonal average — is 32°F, against a record low of 28.4°F. That puts the seasonal coefficient of performance at 3.15 for the recommended standard unit. Folsom's winters don't get cold enough to need the cold-climate premium — a standard unit holds up fine. Source: NOAA station SACRAMENTO MATHER AIRPORT, 11 miles from Folsom — the closest one on record.
Folsom's running-cost comparison, in dollars
A 2000-square-foot house here would pull roughly 1,969 heating kilowatt-hours annually on top of cooling, totalling about $1,096 a year on electricity. That compares with roughly 26 Mcf a year of gas at Folsom's 22.01 per-Mcf rate — about $1,244 a year — against a local electricity rate of 32.83¢/kWh. Buy it outright, not incrementally, and payback stretches to 74 years; over 15 years the net position sits $1,230 ahead.
If your home heats with electric baseboard instead of gas
Not every home in Folsom has gas service. Compared with baseboard or electric-furnace resistance heat, the numbers shift in the heat pump’s favor. About $1,624 a year comes back this way, enough that the 3.4-year payback clears the $5,500 premium comfortably within the equipment's life.
Where Folsom ranks in this dataset
Folsom lands at position 2204 out of 3206 cities on heating severity (coldest is 1), and 406 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 Folsom
Folsom, California is home to about 88,091 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, Folsom 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 Folsom's figure comes from
The methodology guide walks through exactly how Folsom's 3.15 seasonal COP and the rest of this page's numbers get built. The $2,000 federal credit baked into Folsom's number is explained, with the before-and-after math, in the tax credit guide.