Is a heat pump worth it in Lafayette?
Lafayette sits right on the fence — how long you'll own the house decides this one. 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 $97 of lower running costs every year, landing the payback clock at roughly 10.4 years. Whether that's worth it in Lafayette depends on how many years you expect to own the place.
The climate behind Lafayette's payback figure
2162 heating degree days pile up here every year, so Lafayette has a mild winter by US standards; the cooling side runs to 1129 cooling degree days, where summers are hot enough that cooling matters as much as heating. Sizing runs off the design temperature, not the average day: 33.1°F here (record low 32°F), which works out to a seasonal COP of 3.19 for the standard class of unit this climate calls for. A standard ducted system is enough here; Lafayette's design temperature doesn't justify the cold-climate premium. Source: NOAA station BUCHANAN FIELD AIRPORT, 7.8 miles from Lafayette — the closest one on record.
The month-to-month numbers for Lafayette
A 2000-square-foot house here would pull roughly 1,716 heating kilowatt-hours annually on top of cooling, totalling about $879 a year on electricity. The gas furnace it replaces burns roughly 23 Mcf a year at 22.01 per Mcf here, for a running cost near $976 a year (electricity here runs 32.83¢/kWh). Looked at as a full purchase rather than an incremental one, payback here is roughly 114 years, leaving the 15-year total $448 ahead.
If your home heats with electric baseboard instead of gas
Gas isn't universal in Lafayette — many houses run on electric heat already. Against electric-resistance heat — baseboard or an electric furnace, both 100% efficient but still just resistance — the case for switching gets stronger here. The saving here runs about $1,398 a year, which recovers the extra $5,500 spent going electric in roughly 3.9 years.
How Lafayette compares nationally
Among 3206 cities, Lafayette's winter puts it at rank 2362 for severity, while its size puts it at rank 1580 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 Lafayette
About 25,371 people live in Lafayette, 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.
Line up a few local HVAC quotes before you decide.
More on how this number was built
The methodology guide walks through exactly how Lafayette's 3.19 seasonal COP and the rest of this page's numbers get built. Not every home in Lafayette has gas; the guide comparing a heat pump against electric baseboard covers that case separately.