Should College Park switch to a heat pump?
College Park technically pencils out, but only past the point the equipment would need replacing anyway. $3,500 is what College Park 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. That premium is recovered through $119 of lower running costs every year, landing the payback clock at roughly 29.5 years. College Park's own numbers say this pencils out only in theory, not in practice.
Why College Park's climate drives this number
3720 heating degree days pile up here every year, so College Park has a real but manageable winter; the cooling side runs to 1541 cooling degree days, where summers are hot enough that cooling matters as much as heating. The 99% winter design temperature here — the cold snap equipment must be sized for, not the seasonal average — is 14.9°F, against a record low of 12.9°F. That puts the seasonal coefficient of performance at 3.06 for the recommended cold-climate unit. Below the 25°F line where a standard machine starts leaning on resistance backup, College Park sits firmly in cold-climate territory, so that's the class of unit priced here. These numbers come from COLLEGE PARK AP, the closest NOAA station, 1.3 miles out.
The month-to-month numbers for College Park
Electricity use for heating alone comes out to about 3,078 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $929 a year. College Park's gas rate of 16.14 per Mcf, applied to the 39 Mcf a year the furnace burns, puts its running cost near $1,048 a year, against 21.16¢ per kWh for electricity. Looked at as a full purchase rather than an incremental one, payback here is roughly 113.9 years, leaving the 15-year total $1,722 behind.
Electric resistance heat in College Park, compared
Not every home in College Park 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 $1,486 a year, which recovers the extra $8,000 spent going electric in roughly 5.4 years.
How College Park compares nationally
College Park lands at position 1661 out of 3206 cities on heating severity (coldest is 1), and 1186 out of 3206 by population size (biggest is 1). That's the middle third for winter severity among the cities covered here.
What to do with this number in College Park
About 34,667 people live in College Park, Maryland, and every number on this page is what a contractor would actually work from when quoting a system here — the point isn't to replace that quote, it's to tell you whether to bother asking for one. Here, there's no cost penalty to waiting until your current furnace or AC actually needs replacing.
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 College Park's 3.06 seasonal COP and payback figure. College Park's 14.9°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.