Will a heat pump pay off in Shepherdsville, KY?
The payback math works in Shepherdsville on paper, past the equipment's own working life. 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). Lower bills claw that back: about $192 saved annually, for a payback of roughly 18.2 years. That's a technicality, not a recommendation, for anyone actually living in Shepherdsville.
How cold Shepherdsville actually gets
Shepherdsville has a real but manageable winter — 3192 heating degree days a year against a 65°F base — and summers are hot enough that cooling matters as much as heating, at 1992 cooling degree days. 6.1°F is the figure equipment gets sized against here — the 99th-percentile cold snap, not an average day — with a record low of 3°F on file. Worked through the model, that's a seasonal COP of 2.85 on the cold-climate unit fit for this climate. Shepherdsville 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. Climate figures trace to the nearest NOAA station, LOUISVILLE INTL-STANDIFORD FI, 13.9 miles from Shepherdsville.
The month-to-month numbers for Shepherdsville
Electricity use for heating alone comes out to about 2,836 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $653 a year. That compares with roughly 33 Mcf a year of gas at Shepherdsville's 14.23 per-Mcf rate — about $845 a year — against a local electricity rate of 14.39¢/kWh. Buy it outright, not incrementally, and payback stretches to 70.3 years; over 15 years the net position sits $619 behind.
The other scenario: no gas furnace to begin with
Gas isn't universal in Shepherdsville — 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. Switching saves about $882 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 9.1 years.
Shepherdsville against the rest of the country
Ranked against the other 3206 cities covered, Shepherdsville comes in at 1852 for heating severity — 1 would be the coldest place in the dataset — and 2409 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 Shepherdsville
Shepherdsville, Kentucky is home to about 14,837 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 Shepherdsville, nothing is lost by holding off until the current equipment genuinely fails.
Line up a few local HVAC quotes before you decide.
More on how this number was built
Every constant behind this page — the 2.85 seasonal COP, the degree-day corrections, the equipment costs — is documented in the methodology guide. Shepherdsville's 6.1°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.