Should Allen Park switch to a heat pump?

Allen Park is a place where a heat pump genuinely costs more to operate than the alternative. 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. The heat pump would cost about $300 more a year to run than the furnace it replaces — a premium with no payback. There's no spin on that: Allen Park's numbers say wait.

The climate behind Allen Park's payback figure

Allen Park has a cold winter that leans hard on heating equipment — 5000 heating degree days a year against a 65°F base — and summers add a moderate cooling load, at 928 cooling degree days. The 99% winter design temperature here — the cold snap equipment must be sized for, not the seasonal average — is 1.9°F, against a record low of -2.9°F. That puts the seasonal coefficient of performance at 2.75 for the recommended cold-climate unit. Below the 25°F line where a standard machine starts leaning on resistance backup, Allen Park sits firmly in cold-climate territory, so that's the class of unit priced here. Climate figures trace to the nearest NOAA station, DETROIT METRO WAYNE COUNTY AI, 6.5 miles from Allen Park.

Allen Park's running-cost comparison, in dollars

Electricity use for heating alone comes out to about 4,604 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $1,118 a year. Allen Park's gas rate of 10.92 per Mcf, applied to the 52 Mcf a year the furnace burns, puts its running cost near $818 a year, against 20.72¢ per kWh for electricity. 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 $8,000 behind.

If your home heats with electric baseboard instead of gas

Not every home in Allen Park has gas service. Swap the comparison to resistance heat instead of gas, and Allen Park's answer improves. The saving here runs about $1,755 a year, which recovers the extra $8,000 spent going electric in roughly 4.6 years.

Where Allen Park ranks in this dataset

Among 3206 cities, Allen Park's winter puts it at rank 698 for severity, while its size puts it at rank 1452 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.

What to do with this number in Allen Park

About 27,604 people live in Allen Park, Michigan, 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.

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

Where Allen Park's figure comes from

The methodology guide walks through exactly how Allen Park's 2.75 seasonal COP and the rest of this page's numbers get built. Allen Park's 1.9°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.