Heat pump vs. gas furnace in Rialto, CA

In Rialto, a heat pump pays for itself within a reasonable window. Against a like-for-like gas furnace and AC swap, going electric costs $1,000 more up front here (already netting out a $2,000 tax credit). That premium is recovered through $233 of lower running costs every year, landing the payback clock at roughly 4.3 years. That's a real payback, built from Rialto's own climate and utility rates, not a national guess.

The climate behind Rialto's payback figure

Degree days tell the story here: Rialto racks up 1387 heating degree days each year (base 65°F), and summers are hot enough that cooling matters as much as heating, with 1882 cooling degree days on the cooling side. Sizing runs off the design temperature, not the average day: 33.8°F here (record low 33.1°F), which works out to a seasonal COP of 3.21 for the standard class of unit this climate calls for. A standard ducted system is enough here; Rialto's design temperature doesn't justify the cold-climate premium. Source: NOAA station NORTON AAF, 8.1 miles from Rialto — the closest one on record.

The month-to-month numbers for Rialto

A 2000-square-foot house here would pull roughly 1,094 heating kilowatt-hours annually on top of cooling, totalling about $886 a year on electricity. Rialto's gas rate of 22.01 per Mcf, applied to the 14 Mcf a year the furnace burns, puts its running cost near $1,119 a year, against 32.83¢ per kWh for electricity. Buy it outright, not incrementally, and payback stretches to 47.3 years; over 15 years the net position sits $2,490 ahead.

The other scenario: no gas furnace to begin with

Not every home in Rialto has gas service. Compared with baseboard or electric-furnace resistance heat, the numbers shift in the heat pump’s favor. The saving here runs about $1,068 a year, which recovers the extra $5,500 spent going electric in roughly 5.2 years.

Rialto against the rest of the country

Among 3206 cities, Rialto's winter puts it at rank 2738 for severity, while its size puts it at rank 313 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.

Next step for 104,918 people in Rialto

About 104,918 people live in Rialto, 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.

Get quotes from local HVAC contractors before deciding.

More on how this number was built

Every constant behind this page — the 3.21 seasonal COP, the degree-day corrections, the equipment costs — is documented in the methodology guide. See what Rialto's figure looks like without the $2,000 federal credit in the guide to how that credit moves the payback window.