Should Exeter switch to a heat pump?
Exeter clears a genuine payback here, inside a reasonable stretch of years. $1,000 is what Exeter 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. Exeter's residents would see roughly $256 a year back in running costs, putting the payback around 3.9 years. That's a real payback, built from Exeter's own climate and utility rates, not a national guess.
Why Exeter's climate drives this number
2247 heating degree days pile up here every year, so Exeter has a mild winter by US standards; the cooling side runs to 2370 cooling degree days, where summers are hot enough that cooling matters as much as heating. The 99% winter design temperature here — the cold snap equipment must be sized for, not the seasonal average — is 30°F, against a record low of 28.9°F. That puts the seasonal coefficient of performance at 3.09 for the recommended standard unit. A standard ducted system is enough here; Exeter's design temperature doesn't justify the cold-climate premium. Climate figures trace to the nearest NOAA station, VISALIA MUNICIPAL AIRPORT, 14.2 miles from Exeter.
Exeter's running-cost comparison, in dollars
Modelled on a typical 2000-square-foot house, the heat pump draws about 1,841 kWh a year to keep it warm, plus cooling, for a combined electric bill near $1,268 a year. The gas furnace it replaces burns roughly 23 Mcf a year at 22.01 per Mcf here, for a running cost near $1,523 a year (electricity here runs 32.83¢/kWh). Priced as a standalone purchase rather than against a like-for-like replacement, equipment payback runs about 43 years, for a 15-year net position $2,833 ahead.
The other scenario: no gas furnace to begin with
Plenty of homes in Exeter heat with electricity alone, no gas line involved. Swap the comparison to resistance heat instead of gas, and Exeter's answer improves. Switching saves about $1,608 a year here — a heat pump moving heat rather than generating it needs far less electricity than resistance coils — so the extra $5,500 spent up front comes back in about 3.4 years.
How Exeter compares nationally
Among 3206 cities, Exeter's winter puts it at rank 2311 for severity, while its size puts it at rank 3157 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 Exeter, CA
About 10,186 people live in Exeter, 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.
Line up a few local HVAC quotes before you decide.
More on how this number was built
Every constant behind this page — the 3.09 seasonal COP, the degree-day corrections, the equipment costs — is documented in the methodology guide. See what Exeter's figure looks like without the $2,000 federal credit in the guide to how that credit moves the payback window.