Heat Pump Payback in Larkspur, CA
Larkspur, CA: the heat pump payback math
Larkspur 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 $3,000. Unfortunately the electric bill outweighs the gas bill it replaces by about $3 a year here, so the extra spend stays unrecovered. That's Larkspur's own climate and rates talking, not a hedge or a caveat.
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Landed on Larkspur by mistake, or want to compare it against somewhere else? Search the other 3206 cities below.
How cold Larkspur actually gets
Degree days tell the story here: Larkspur racks up 2538 heating degree days each year (base 65°F), and summers rarely ask much of an air conditioner, with 78 cooling degree days on the cooling side. Sizing runs off the design temperature, not the average day: 45.1°F here (coldest 2024 reading 43°F), which works out to a seasonal COP of 3.54 for the standard class of unit this climate calls for. Larkspur's winters don't get cold enough to need the cold-climate premium, a standard unit holds up fine. Source: NOAA station Richmond, 7.1 miles from Larkspur, the closest one on record.
The yearly running costs in Larkspur
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. The gas furnace it replaces burns roughly 26 Mcf a year at $22.01 per Mcf here, for a running cost near $615 a year including the old AC (electricity here runs 32.83¢/kWh). Because the heat pump costs more to run here, the gap only widens with time: $3,043 behind after 15 years compared with replacing the furnace and AC like-for-like.
How sensitive Larkspur's result is to prices
For the verdict in Larkspur to flip, electricity would need to drop to about 32.7¢/kWh from 32.83¢, or gas climb past $22.12 per Mcf from $22.01. A utility offering a lower heat pump rate can change this. Until then, no quote price makes a heat pump pay back against gas in Larkspur; the case for one here rests on comfort, cooling, or replacing electric heat instead.
If your home heats with electric baseboard instead of gas
Gas isn't universal in Larkspur, many houses run on electric heat already. Swap the comparison to resistance heat instead of gas, and Larkspur's answer improves. The saving here runs about $1,525 a year, which recovers the extra $7,500 spent going electric in roughly 4.9 years.
Larkspur against the rest of the country
Larkspur lands at position 2143 out of 3206 cities on heating severity (coldest is 1), and 2679 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.
Next step if you live in Larkspur
Larkspur, California is home to about 12,807 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 Larkspur, nothing is lost by holding off until the current equipment genuinely fails.
Get quotes from local HVAC contractors before deciding.
Reading further on this page's numbers
The methodology guide walks through exactly how Larkspur's 3.54 seasonal COP and the rest of this page's numbers get built. Larkspur 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.