Heat pump vs. gas furnace in Emmaus, PA
Emmaus is a place where a heat pump genuinely costs more to operate than the alternative. 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). Unfortunately the electric bill outweighs the gas bill it replaces by about $36 a year here, so the extra spend stays unrecovered. There's no spin on that: Emmaus's numbers say wait.
The climate behind Emmaus's payback figure
Degree days tell the story here: Emmaus racks up 4777 heating degree days each year (base 65°F), and summers add a moderate cooling load, with 985 cooling degree days on the cooling side. Sizing runs off the design temperature, not the average day: 7°F here (record low 1°F), which works out to a seasonal COP of 2.87 for the cold-climate class of unit this climate calls for. Emmaus 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. Source: NOAA station LEHIGH VALLEY INTERNATIONAL A, 8.4 miles from Emmaus — the closest one on record.
The month-to-month numbers for Emmaus
Electricity use for heating alone comes out to about 4,215 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $1,049 a year. The gas furnace it replaces burns roughly 50 Mcf a year at 15.04 per Mcf here, for a running cost near $1,013 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 $4,035 behind.
The other scenario: no gas furnace to begin with
Not every home in Emmaus has gas service. Against electric-resistance heat — baseboard or an electric furnace, both 100% efficient but still just resistance — the case for switching gets stronger here. Switching saves about $1,726 a year here — a heat pump moving heat rather than generating it needs far less electricity than resistance coils — so the extra $8,000 spent up front comes back in about 4.6 years.
Where Emmaus ranks in this dataset
Among 3206 cities, Emmaus's winter puts it at rank 972 for severity, while its size puts it at rank 2764 for population — 1 in both cases being the extreme. That's the coldest third of the dataset, where climate does most of the work behind this figure.
Next step for 12,314 people in Emmaus
About 12,314 people live in Emmaus, Pennsylvania, 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.
Get quotes from local HVAC contractors before deciding.
Reading further on this page's numbers
Nothing above is a black box: the methodology guide shows the full arithmetic behind Emmaus's 2.87 seasonal COP and payback figure. Emmaus's 7°F design temperature is below the 25°F line, which is why a cold-climate unit is the right call here — see what that changes in the cold-climate unit guide.