Heat Pump Payback in Portsmouth, VA
Is a heat pump worth it in Portsmouth?
This one's marginal in Portsmouth: it only clears if you stay long enough. Against a like-for-like gas furnace and AC swap, going electric costs $3,000 more up front here. Portsmouth's residents would see roughly $218 a year back in running costs, putting the payback around 13.8 years. It's a genuine toss-up here, Portsmouth's numbers don't point clearly either way.
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Portsmouth is one of 3206 cities covered here, each run through the same model. Search another below.
How cold Portsmouth actually gets
Degree days tell the story here: Portsmouth racks up 2541 heating degree days each year (base 65°F), and summers are hot enough that cooling matters as much as heating, with 1741 cooling degree days on the cooling side. The 99% winter design temperature here, the cold snap equipment must be sized for, not the seasonal average, is 27.3°F, and the coldest daily reading in the 2024 station record was 21.2°F. That puts the seasonal coefficient of performance at 3.01 for the recommended standard unit. Portsmouth's winters don't get cold enough to need the cold-climate premium, a standard unit holds up fine. Source: NOAA station S Craney Island, 2.1 miles from Portsmouth, the closest one on record.
The yearly running costs in Portsmouth
Electricity use for heating alone comes out to about 2,138 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $601 a year. That compares with roughly 26 Mcf a year of gas at Portsmouth's $16.79 per-Mcf rate, about $818 a year with the old AC included, against a local electricity rate of 16.58¢/kWh. Buying outright rather than at replacement time stretches payback to longer than the 15-year equipment life. Over 15 years, compared with a like-for-like replacement, the heat pump leaves you $268 ahead.
The break-even point in Portsmouth
Gas would only overtake the heat pump in Portsmouth if electricity rose past 32.5¢/kWh from 16.58¢, or gas fell under $8.56 per Mcf from $16.79. A useful quote test for Portsmouth: the heat pump is worth it within a decade if it costs less than $2,180 more than replacing the furnace and AC, and within 7 years if the gap is under $1,526.
If your home heats with electric baseboard instead of gas
Gas isn't universal in Portsmouth, many houses run on electric heat already. Compared with baseboard or electric-furnace resistance heat, the numbers shift in the heat pump’s favor. Switching saves about $840 a year here, a heat pump moving heat rather than generating it needs far less electricity than resistance coils, so the extra $7,500 spent up front comes back in about 8.9 years.
Portsmouth against the rest of the country
Among 3206 cities, Portsmouth's winter puts it at rank 2138 for severity, while its size puts it at rank 356 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 Portsmouth
Portsmouth, Virginia is home to about 96,482 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 Portsmouth, nothing is lost by holding off until the current equipment genuinely fails.
Get quotes from local HVAC contractors before deciding.
Where Portsmouth's figure comes from
Every constant behind this page, the 3.01 seasonal COP, the degree-day corrections, the equipment costs, is documented in the methodology guide. Homes in Portsmouth without gas service should read the electric-resistance comparison instead, the numbers there differ from the gas case above.