Will a heat pump pay off in Davis, CA?

This one's marginal in Davis: it only clears if you stay long enough. 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 $123 of lower running costs every year, landing the payback clock at roughly 8.1 years. Whether that's worth it in Davis depends on how many years you expect to own the place.

The climate behind Davis's payback figure

2445 heating degree days pile up here every year, so Davis has a mild winter by US standards; the cooling side runs to 1427 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 32°F, against a record low of 30.2°F. That puts the seasonal coefficient of performance at 3.15 for the recommended standard unit. A standard ducted system is enough here; Davis's design temperature doesn't justify the cold-climate premium. These numbers come from UNIVERSITY AIRPORT, the closest NOAA station, 2.9 miles out.

The month-to-month numbers for Davis

Electricity use for heating alone comes out to about 1,965 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $1,045 a year. That compares with roughly 25 Mcf a year of gas at Davis's 22.01 per-Mcf rate — about $1,168 a year — against a local electricity rate of 32.83¢/kWh. Priced as a standalone purchase rather than against a like-for-like replacement, equipment payback runs about 89.5 years, for a 15-year net position $844 ahead.

The other scenario: no gas furnace to begin with

Plenty of homes in Davis heat with electricity alone, no gas line involved. Compared with baseboard or electric-furnace resistance heat, the numbers shift in the heat pump’s favor. About $1,595 a year comes back this way, enough that the 3.4-year payback clears the $5,500 premium comfortably within the equipment's life.

Davis against the rest of the country

Davis lands at position 2207 out of 3206 cities on heating severity (coldest is 1), and 582 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 67,125 people in Davis

About 67,125 people live in Davis, 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, there's no cost penalty to waiting until your current furnace or AC actually needs replacing.

Ask a local HVAC contractor for a quote before committing either way.

More on how this number was built

The methodology guide walks through exactly how Davis's 3.15 seasonal COP and the rest of this page's numbers get built. Not every home in Davis has gas; the guide comparing a heat pump against electric baseboard covers that case separately.