Coatesville, PA: the heat pump payback math
In Coatesville, the extra upfront cost technically comes back, just not before the equipment wears out. Swap a failed furnace and AC for a heat pump rather than buying like-for-like, and the extra cost here runs $3,500 after a $2,000 federal tax credit. Lower bills claw that back: about $17 saved annually, for a payback of roughly 200.2 years. That's a technicality, not a recommendation, for anyone actually living in Coatesville.
Coatesville's weather, in the numbers that matter
Degree days tell the story here: Coatesville racks up 4538 heating degree days each year (base 65°F), and summers add a moderate cooling load, with 989 cooling degree days on the cooling side. 14°F is the figure equipment gets sized against here — the 99th-percentile cold snap, not an average day — with a record low of 8.6°F on file. Worked through the model, that's a seasonal COP of 3.04 on the cold-climate unit fit for this climate. Below the 25°F line where a standard machine starts leaning on resistance backup, Coatesville sits firmly in cold-climate territory, so that's the class of unit priced here. These numbers come from CHESTER COUNTY GO CARLSON AIR, the closest NOAA station, 2.5 miles out.
What it actually costs to run, year to year
Electricity use for heating alone comes out to about 3,780 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $959 a year. The gas furnace it replaces burns roughly 47 Mcf a year at 15.04 per Mcf here, for a running cost near $977 a year (electricity here runs 20.75¢/kWh). Looked at as a full purchase rather than an incremental one, payback here is roughly 772.4 years, leaving the 15-year total $3,238 behind.
If your home heats with electric baseboard instead of gas
Plenty of homes in Coatesville heat with electricity alone, no gas line involved. Swap the comparison to resistance heat instead of gas, and Coatesville's answer improves. The saving here runs about $1,691 a year, which recovers the extra $8,000 spent going electric in roughly 4.7 years.
Where Coatesville ranks in this dataset
Ranked against the other 3206 cities covered, Coatesville comes in at 1185 for heating severity — 1 would be the coldest place in the dataset — and 2603 by population, where 1 is largest. That's the middle third for winter severity among the cities covered here.
What to do with this number in Coatesville
Coatesville, Pennsylvania is home to about 13,390 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 Coatesville, nothing is lost by holding off until the current equipment genuinely fails.
Line up a few local HVAC quotes before you decide.
Reading further on this page's numbers
Nothing above is a black box: the methodology guide shows the full arithmetic behind Coatesville's 3.04 seasonal COP and payback figure. Coatesville's 14°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.