Will a heat pump pay off in Signal Hill, CA?

In Signal Hill, the math is close enough that it comes down to how long you plan to stay. 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). Lower bills claw that back: about $114 saved annually, for a payback of roughly 8.8 years. It's a genuine toss-up here — Signal Hill's numbers don't point clearly either way.

Signal Hill's weather, in the numbers that matter

Degree days tell the story here: Signal Hill racks up 1041 heating degree days each year (base 65°F), and summers add a moderate cooling load, with 884 cooling degree days on the cooling side. Sizing runs off the design temperature, not the average day: 41°F here (record low 39.9°F), which works out to a seasonal COP of 3.42 for the standard class of unit this climate calls for. Signal Hill's winters don't get cold enough to need the cold-climate premium — a standard unit holds up fine. Source: NOAA station LONG BEACH / DAUGHERTY FIELD, 1.5 miles from Signal Hill — the closest one on record.

What it actually costs to run, year to year

Electricity use for heating alone comes out to about 771 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $500 a year. The gas furnace it replaces burns roughly 11 Mcf a year at 22.01 per Mcf here, for a running cost near $615 a year (electricity here runs 32.83¢/kWh). Priced as a standalone purchase rather than against a like-for-like replacement, equipment payback runs about 96.3 years, for a 15-year net position $714 ahead.

The other scenario: no gas furnace to begin with

Plenty of homes in Signal Hill heat with electricity alone, no gas line involved. Swap the comparison to resistance heat instead of gas, and Signal Hill's answer improves. The saving here runs about $741 a year, which recovers the extra $5,500 spent going electric in roughly 7.4 years.

How Signal Hill compares nationally

Among 3206 cities, Signal Hill's winter puts it at rank 2889 for severity, while its size puts it at rank 2932 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 Signal Hill

Signal Hill, California is home to about 11,279 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 Signal Hill, nothing is lost by holding off until the current equipment genuinely fails.

Line up a few local HVAC quotes before you decide.

More on how this number was built

Every constant behind this page — the 3.42 seasonal COP, the degree-day corrections, the equipment costs — is documented in the methodology guide. Homes in Signal Hill without gas service should read the electric-resistance comparison instead — the numbers there differ from the gas case above.