Heat Pump Payback in Morristown, TN
Heat pump vs. gas furnace in Morristown, TN
The payback math works in Morristown on paper, past the equipment's own working life. Against a like-for-like gas furnace and AC swap, going electric costs $5,500 more up front here. That premium is recovered through $79 of lower running costs every year, landing the payback clock at roughly 69.2 years. That's a technicality, not a recommendation, for anyone actually living in Morristown.
Checking a different city
This runs the same numbers for 3206 US cities, not just Morristown. Look one up here.
Morristown's weather, in the numbers that matter
Degree days tell the story here: Morristown racks up 2456 heating degree days each year (base 65°F), and summers add a moderate cooling load, with 981 cooling degree days on the cooling side. Sizing runs off the design temperature, not the average day: 14°F here (coldest 2024 reading 12.2°F), which works out to a seasonal COP of 3.04 for the cold-climate class of unit this climate calls for. Mild on average, but the occasional cold snap is what sizes the equipment: at a 14°F design temperature Morristown falls just under the 25°F line where a standard heat pump starts leaning on resistance backup, so the model prices a cold-climate unit to be safe. Source: NOAA station Lee County Airport, 31.4 miles from Morristown, the closest one on record.
Morristown's running-cost comparison, in dollars
Electricity use for heating alone comes out to about 2,046 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $400 a year. The gas furnace it replaces burns roughly 26 Mcf a year at $11.84 per Mcf here, for a running cost near $479 a year including the old AC (electricity here runs 13.87¢/kWh). If the current system still worked and you replaced it anyway, the full cost would take longer than the 15-year equipment life to earn back; against buying a new furnace and AC regardless, the 15-year total lands $4,308 behind.
The break-even point in Morristown
Gas would only overtake the heat pump in Morristown if electricity rose past 18.8¢/kWh from 13.87¢, or gas fell under $8.73 per Mcf from $11.84. A useful quote test for Morristown: the heat pump is worth it within a decade if it costs less than $790 more than replacing the furnace and AC, and within 7 years if the gap is under $553.
Electric resistance heat in Morristown, compared
Gas isn't universal in Morristown, many houses run on electric heat already. Compared with baseboard or electric-furnace resistance heat, the numbers shift in the heat pump’s favor. The gap still doesn't close: the $10,000 incremental cost outlasts the 15-year equipment life here even against resistance heat.
Morristown against the rest of the country
Morristown lands at position 2203 out of 3206 cities on heating severity (coldest is 1), and 1247 out of 3206 by population size (biggest is 1). That's the mildest third of cities covered, where utility rates carry more of the answer than climate does.
Next step if you live in Morristown
Morristown, Tennessee is home to about 32,994 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 Morristown, 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
The methodology guide walks through exactly how Morristown's 3.04 seasonal COP and the rest of this page's numbers get built. At a 14°F design temperature, Morristown sits in cold-climate territory; the guide to that class of unit explains why.