Melissa, TX: the heat pump payback math
This one's marginal in Melissa: it only clears if you stay long enough. Swap a failed furnace and AC for a heat pump rather than buying like-for-like, and the extra cost here runs $3,500 after a $2,000 federal tax credit. That premium is recovered through $341 of lower running costs every year, landing the payback clock at roughly 10.3 years. It's a genuine toss-up here — Melissa's numbers don't point clearly either way.
How cold Melissa actually gets
1985 heating degree days pile up here every year, so Melissa has a mild winter by US standards; the cooling side runs to 2940 cooling degree days, where summers are severe enough that cooling can dominate the annual bill. 12°F is the figure equipment gets sized against here — the 99th-percentile cold snap, not an average day — with a record low of 9°F on file. Worked through the model, that's a seasonal COP of 2.99 on the cold-climate unit fit for this climate. Melissa 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 MCKINNEY MUNICIPAL ARPT, 7.1 miles from Melissa — the closest one on record.
The month-to-month numbers for Melissa
A 2000-square-foot house here would pull roughly 1,681 heating kilowatt-hours annually on top of cooling, totalling about $676 a year on electricity. That compares with roughly 21 Mcf a year of gas at Melissa's 19.42 per-Mcf rate — about $1,017 a year — against a local electricity rate of 16.15¢/kWh. Looked at as a full purchase rather than an incremental one, payback here is roughly 39.6 years, leaving the 15-year total $1,608 ahead.
Electric resistance heat in Melissa, compared
Gas isn't universal in Melissa — many houses run on electric heat already. Compared with baseboard or electric-furnace resistance heat, the numbers shift in the heat pump’s favor. About $751 a year comes back this way, enough that the 10.7-year payback clears the $8,000 premium comfortably within the equipment's life.
How Melissa compares nationally
Melissa lands at position 2434 out of 3206 cities on heating severity (coldest is 1), and 1527 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.
Deciding what's next in Melissa, TX
Melissa, Texas is home to about 26,194 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 Melissa, nothing is lost by holding off until the current equipment genuinely fails.
Get quotes from local HVAC contractors before deciding.
Reading further on this page's numbers
Every constant behind this page — the 2.99 seasonal COP, the degree-day corrections, the equipment costs — is documented in the methodology guide. Melissa's 12°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.