Aliso Viejo, CA: the heat pump payback math
In Aliso Viejo, 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). That premium is recovered through $106 of lower running costs every year, landing the payback clock at roughly 9.4 years. It's a genuine toss-up here — Aliso Viejo's numbers don't point clearly either way.
Aliso Viejo's weather, in the numbers that matter
Degree days tell the story here: Aliso Viejo racks up 1159 heating degree days each year (base 65°F), and summers add a moderate cooling load, with 804 cooling degree days on the cooling side. 43°F is the figure equipment gets sized against here — the 99th-percentile cold snap, not an average day — with a record low of 41°F on file. Worked through the model, that's a seasonal COP of 3.48 on the standard unit fit for this climate. Aliso Viejo's winters don't get cold enough to need the cold-climate premium — a standard unit holds up fine. These numbers come from J. WAYNE APT-ORANGE CO APT, the closest NOAA station, 10.5 miles out.
What it actually costs to run, year to year
Modelled on a typical 2000-square-foot house, the heat pump draws about 843 kWh a year to keep it warm, plus cooling, for a combined electric bill near $502 a year. That compares with roughly 12 Mcf a year of gas at Aliso Viejo's 22.01 per-Mcf rate — about $608 a year — against a local electricity rate of 32.83¢/kWh. Looked at as a full purchase rather than an incremental one, payback here is roughly 103.9 years, leaving the 15-year total $588 ahead.
If your home heats with electric baseboard instead of gas
Gas isn't universal in Aliso Viejo — many houses run on electric heat already. Swap the comparison to resistance heat instead of gas, and Aliso Viejo's answer improves. About $804 a year comes back this way, enough that the 6.8-year payback clears the $5,500 premium comfortably within the equipment's life.
Where Aliso Viejo ranks in this dataset
Among 3206 cities, Aliso Viejo's winter puts it at rank 2824 for severity, while its size puts it at rank 810 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.
Deciding what's next in Aliso Viejo, CA
Aliso Viejo, California is home to about 50,457 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 Aliso Viejo, nothing is lost by holding off until the current equipment genuinely fails.
Get quotes from local HVAC contractors before deciding.
More on how this number was built
Every constant behind this page — the 3.48 seasonal COP, the degree-day corrections, the equipment costs — is documented in the methodology guide. Homes in Aliso Viejo without gas service should read the electric-resistance comparison instead — the numbers there differ from the gas case above.