Is a heat pump worth it in Campbell?
In Campbell, the math is close enough that it comes down to how long you plan to stay. 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 $92 saved annually, for a payback of roughly 10.8 years. It's a genuine toss-up here — Campbell's numbers don't point clearly either way.
How cold Campbell actually gets
Campbell has a mild winter by US standards — 1672 heating degree days a year against a 65°F base — and summers add a moderate cooling load, at 922 cooling degree days. Sizing runs off the design temperature, not the average day: 36°F here (record low 35.1°F), which works out to a seasonal COP of 3.27 for the standard class of unit this climate calls for. Campbell's winters don't get cold enough to need the cold-climate premium — a standard unit holds up fine. These numbers come from N Y. MINETA SN JO INTL APT, the closest NOAA station, 5.7 miles out.
What it actually costs to run, year to year
Electricity use for heating alone comes out to about 1,295 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $683 a year. Campbell's gas rate of 22.01 per Mcf, applied to the 17 Mcf a year the furnace burns, puts its running cost near $776 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 119 years, for a 15-year net position $386 ahead.
Electric resistance heat in Campbell, compared
Gas isn't universal in Campbell — many houses run on electric heat already. Swap the comparison to resistance heat instead of gas, and Campbell's answer improves. Switching saves about $1,099 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 5 years.
Campbell against the rest of the country
Among 3206 cities, Campbell's winter puts it at rank 2602 for severity, while its size puts it at rank 959 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.
What to do with this number in Campbell
Campbell, California is home to about 42,895 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. In Campbell, nothing is lost by holding off until the current equipment genuinely fails.
Get quotes from local HVAC contractors before deciding.
Reading further on this page's numbers
Nothing above is a black box: the methodology guide shows the full arithmetic behind Campbell's 3.27 seasonal COP and payback figure. Homes in Campbell without gas service should read the electric-resistance comparison instead — the numbers there differ from the gas case above.