Is a heat pump worth it in Portsmouth?
Portsmouth technically pencils out, but only past the point the equipment would need replacing anyway. $3,500 is what Portsmouth 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. Lower bills claw that back: about $32 saved annually, for a payback of roughly 110.3 years. That's a technicality, not a recommendation, for anyone actually living in Portsmouth.
Portsmouth's weather, in the numbers that matter
3696 heating degree days pile up here every year, so Portsmouth has a real but manageable winter; the cooling side runs to 1158 cooling degree days, where summers are hot enough that cooling matters as much as heating. Sizing runs off the design temperature, not the average day: 8.1°F here (record low 1.9°F), which works out to a seasonal COP of 2.89 for the cold-climate class of unit this climate calls for. A cold-climate unit is the right call in Portsmouth — below 25°F design temperature, a standard heat pump leans hard on electric-resistance backup, which erases most of the savings. Climate figures trace to the nearest NOAA station, ASHLAND RGNL, 17.8 miles from Portsmouth.
What it actually costs to run, year to year
Electricity use for heating alone comes out to about 3,238 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $778 a year. That compares with roughly 38 Mcf a year of gas at Portsmouth's 13.85 per-Mcf rate — about $809 a year — against a local electricity rate of 18.40¢/kWh. Buy it outright, not incrementally, and payback stretches to 425.3 years; over 15 years the net position sits $3,024 behind.
Electric resistance heat in Portsmouth, compared
Gas isn't universal in Portsmouth — many houses run on electric heat already. Against electric-resistance heat — baseboard or an electric furnace, both 100% efficient but still just resistance — the case for switching gets stronger here. The saving here runs about $1,221 a year, which recovers the extra $8,000 spent going electric in roughly 6.6 years.
Portsmouth against the rest of the country
Among 3206 cities, Portsmouth's winter puts it at rank 1685 for severity, while its size puts it at rank 2140 for population — 1 in both cases being the extreme. That's the middle third for winter severity among the cities covered here.
What to do with this number in Portsmouth
Portsmouth, Ohio is home to about 17,489 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.
Ask a local HVAC contractor for a quote before committing either way.
Where Portsmouth's figure comes from
Nothing above is a black box: the methodology guide shows the full arithmetic behind Portsmouth's 2.89 seasonal COP and payback figure. At a 8.1°F design temperature, Portsmouth sits in cold-climate territory; the guide to that class of unit explains why.