Will a heat pump pay off in Antioch, CA?

This one's marginal in Antioch: it only clears if you stay long enough. $1,000 is what Antioch 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. Antioch's residents would see roughly $123 a year back in running costs, putting the payback around 8.2 years. It's a genuine toss-up here — Antioch's numbers don't point clearly either way.

How cold Antioch actually gets

Degree days tell the story here: Antioch racks up 1907 heating degree days each year (base 65°F), and summers are hot enough that cooling matters as much as heating, with 1014 cooling degree days on the cooling side. Sizing runs off the design temperature, not the average day: 41.4°F here (record low 39.7°F), which works out to a seasonal COP of 3.43 for the standard class of unit this climate calls for. Antioch'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, PITTSBURG (SUISUN BAY) , 6.6 miles from Antioch.

The month-to-month numbers for Antioch

Modelled on a typical 2000-square-foot house, the heat pump draws about 1,408 kWh a year to keep it warm, plus cooling, for a combined electric bill near $746 a year. That compares with roughly 20 Mcf a year of gas at Antioch's 22.01 per-Mcf rate — about $869 a year — against a local electricity rate of 32.83¢/kWh. Buy it outright, not incrementally, and payback stretches to 89.8 years; over 15 years the net position sits $838 ahead.

If your home heats with electric baseboard instead of gas

Not every home in Antioch has gas service. Swap the comparison to resistance heat instead of gas, and Antioch's answer improves. About $1,271 a year comes back this way, enough that the 4.3-year payback clears the $5,500 premium comfortably within the equipment's life.

How Antioch compares nationally

Antioch lands at position 2475 out of 3206 cities on heating severity (coldest is 1), and 253 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 118,453 people in Antioch

Antioch, California is home to about 118,453 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 Antioch, nothing is lost by holding off until the current equipment genuinely fails.

Get quotes from local HVAC contractors before deciding.

Where Antioch's figure comes from

Every constant behind this page — the 3.43 seasonal COP, the degree-day corrections, the equipment costs — is documented in the methodology guide. Homes in Antioch without gas service should read the electric-resistance comparison instead — the numbers there differ from the gas case above.