Corte Madera, CA: the heat pump payback math
Corte Madera is a place where a heat pump genuinely costs more to operate than the alternative. 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. Unfortunately the electric bill outweighs the gas bill it replaces by about $3 a year here, so the extra spend stays unrecovered. That's Corte Madera's own climate and rates talking, not a hedge or a caveat.
Corte Madera's weather, in the numbers that matter
Corte Madera has a mild winter by US standards — 2538 heating degree days a year against a 65°F base — and summers rarely ask much of an air conditioner, at 78 cooling degree days. 45.1°F is the figure equipment gets sized against here — the 99th-percentile cold snap, not an average day — with a record low of 43°F on file. Worked through the model, that's a seasonal COP of 3.54 on the standard unit fit for this climate. Corte Madera's winters don't get cold enough to need the cold-climate premium — a standard unit holds up fine. These numbers come from RICHMOND, the closest NOAA station, 5.9 miles out.
The month-to-month numbers for Corte Madera
A 2000-square-foot house here would pull roughly 1,815 heating kilowatt-hours annually on top of cooling, totalling about $618 a year on electricity. That compares with roughly 26 Mcf a year of gas at Corte Madera's 22.01 per-Mcf rate — about $615 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 longer than the 15-year equipment life, leaving the 15-year total $1,043 behind.
Electric resistance heat in Corte Madera, compared
Plenty of homes in Corte Madera heat with electricity alone, no gas line involved. Against electric-resistance heat — baseboard or an electric furnace, both 100% efficient but still just resistance — the case for switching gets stronger here. About $1,525 a year comes back this way, enough that the 3.6-year payback clears the $5,500 premium comfortably within the equipment's life.
Where Corte Madera ranks in this dataset
Corte Madera lands at position 2145 out of 3206 cities on heating severity (coldest is 1), and 3205 out of 3206 by population size (biggest is 1). That's the mildest third of cities covered, where utility rates carry more of the answer than climate does.
Deciding what's next in Corte Madera, CA
Corte Madera, California is home to about 10,006 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 Corte Madera, nothing is lost by holding off until the current equipment genuinely fails.
Ask a local HVAC contractor for a quote before committing either way.
Reading further on this page's numbers
Every constant behind this page — the 3.54 seasonal COP, the degree-day corrections, the equipment costs — is documented in the methodology guide. Corte Madera is one of the cities where running costs land higher every year, not just slower to pay back — the guide to where this happens lays out why.