Should La Mirada switch to a heat pump?
A heat pump earns back its extra cost in La Mirada within a sensible timeframe. $1,000 is what La Mirada 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. That premium is recovered through $125 of lower running costs every year, landing the payback clock at roughly 8 years. The window here is reasonable, and it's specific to what La Mirada actually pays for power and gas.
How cold La Mirada actually gets
Degree days tell the story here: La Mirada racks up 1315 heating degree days each year (base 65°F), and summers are hot enough that cooling matters as much as heating, with 1024 cooling degree days on the cooling side. Sizing runs off the design temperature, not the average day: 39°F here (record low 35.1°F), which works out to a seasonal COP of 3.36 for the standard class of unit this climate calls for. La Mirada's winters don't get cold enough to need the cold-climate premium — a standard unit holds up fine. These numbers come from FULLERTON MUNICIPAL ARPT, the closest NOAA station, 2.7 miles out.
What it actually costs to run, year to year
A 2000-square-foot house here would pull roughly 991 heating kilowatt-hours annually on top of cooling, totalling about $612 a year on electricity. The gas furnace it replaces burns roughly 14 Mcf a year at 22.01 per Mcf here, for a running cost near $737 a year (electricity here runs 32.83¢/kWh). Looked at as a full purchase rather than an incremental one, payback here is roughly 87.9 years, leaving the 15-year total $877 ahead.
If your home heats with electric baseboard instead of gas
Not every home in La Mirada has gas service. Compared with baseboard or electric-furnace resistance heat, the numbers shift in the heat pump’s favor. About $917 a year comes back this way, enough that the 6-year payback clears the $5,500 premium comfortably within the equipment's life.
How La Mirada compares nationally
Ranked against the other 3206 cities covered, La Mirada comes in at 2759 for heating severity — 1 would be the coldest place in the dataset — and 882 by population, where 1 is largest. 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 La Mirada
La Mirada, California is home to about 46,367 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. Given the math above, La Mirada is a place worth lining up quotes ahead of a breakdown, not waiting for one.
Ask a local HVAC contractor for a quote before committing either way.
More on how this number was built
The methodology guide walks through exactly how La Mirada's 3.36 seasonal COP and the rest of this page's numbers get built. The $2,000 federal credit baked into La Mirada's number is explained, with the before-and-after math, in the tax credit guide.