Is a heat pump worth it in Collierville?

In Collierville, the extra upfront cost technically comes back, just not before the equipment wears out. 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 $142 saved annually, for a payback of roughly 24.6 years. That's a technicality, not a recommendation, for anyone actually living in Collierville.

How cold Collierville actually gets

Collierville has a mild winter by US standards — 2525 heating degree days a year against a 65°F base — and summers are hot enough that cooling matters as much as heating, at 2135 cooling degree days. 10.4°F is the figure equipment gets sized against here — the 99th-percentile cold snap, not an average day — with a record low of -0.4°F on file. Worked through the model, that's a seasonal COP of 2.95 on the cold-climate unit fit for this climate. Collierville 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 OLIVE BRANCH AIRPORT, 7 miles from Collierville — the closest one on record.

What it actually costs to run, year to year

Electricity use for heating alone comes out to about 2,167 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $553 a year. Collierville's gas rate of 11.84 per Mcf, applied to the 26 Mcf a year the furnace burns, puts its running cost near $695 a year, against 13.87¢ per kWh for electricity. Priced as a standalone purchase rather than against a like-for-like replacement, equipment payback runs about 95 years, for a 15-year net position $1,369 behind.

The other scenario: no gas furnace to begin with

Gas isn't universal in Collierville — many houses run on electric heat already. Swap the comparison to resistance heat instead of gas, and Collierville's answer improves. About $717 a year comes back this way, enough that the 11.2-year payback clears the $8,000 premium comfortably within the equipment's life.

Collierville against the rest of the country

Ranked against the other 3206 cities covered, Collierville comes in at 2161 for heating severity — 1 would be the coldest place in the dataset — and 784 by population, where 1 is largest. That's the mildest third of cities covered, where utility rates carry more of the answer than climate does.

What to do with this number in Collierville

Collierville, Tennessee is home to about 51,951 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 Collierville, nothing is lost by holding off until the current equipment genuinely fails.

Ask a local HVAC contractor for a quote before committing either way.

More on how this number was built

The methodology guide walks through exactly how Collierville's 2.95 seasonal COP and the rest of this page's numbers get built. At a 10.4°F design temperature, Collierville sits in cold-climate territory; the guide to that class of unit explains why.