Will a heat pump pay off in Williamsport, PA?
In Williamsport, a heat pump would cost more to run each year than what you have now. Against a like-for-like gas furnace and AC swap, going electric costs $3,500 more up front here (already netting out a $2,000 tax credit). Running costs here land $42 a year HIGHER than the furnace it replaces, so that premium is never recovered. That's Williamsport's own climate and rates talking, not a hedge or a caveat.
How cold Williamsport actually gets
Degree days tell the story here: Williamsport racks up 4912 heating degree days each year (base 65°F), and summers add a moderate cooling load, with 885 cooling degree days on the cooling side. Sizing runs off the design temperature, not the average day: 8.1°F here (record low 3.9°F), which works out to a seasonal COP of 2.89 for the cold-climate class of unit this climate calls for. Williamsport needs the cold-climate class of unit: past a 25°F design temperature a standard heat pump falls back on resistance backup often enough to eat the savings. These numbers come from WILLIAMSPORT REGIONAL AIRPORT, the closest NOAA station, 5.9 miles out.
What it actually costs to run, year to year
Electricity use for heating alone comes out to about 4,304 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $1,050 a year. The gas furnace it replaces burns roughly 51 Mcf a year at 15.04 per Mcf here, for a running cost near $1,007 a year (electricity here runs 20.75¢/kWh). Priced as a standalone purchase rather than against a like-for-like replacement, equipment payback runs past the 15-year equipment life, for a 15-year net position $4,133 behind.
Electric resistance heat in Williamsport, compared
Not every home in Williamsport has gas service. Compared with baseboard or electric-furnace resistance heat, the numbers shift in the heat pump’s favor. The saving here runs about $1,769 a year, which recovers the extra $8,000 spent going electric in roughly 4.5 years.
How Williamsport compares nationally
Williamsport lands at position 846 out of 3206 cities on heating severity (coldest is 1), and 1449 out of 3206 by population size (biggest is 1). That's the coldest third of the dataset, where climate does most of the work behind this figure.
What to do with this number in Williamsport
Williamsport, Pennsylvania is home to about 27,628 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 Williamsport, 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 Williamsport's figure comes from
Nothing above is a black box: the methodology guide shows the full arithmetic behind Williamsport's 2.89 seasonal COP and payback figure. Williamsport's 8.1°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.