Heat Pump Payback in Portage, MI
Heat pump vs. gas furnace in Portage, MI
In Portage, a heat pump would cost more to run each year than what you have now. Swap a failed furnace and AC for a heat pump rather than buying like-for-like, and the extra cost here runs $5,500. Unfortunately the electric bill outweighs the gas bill it replaces by about $300 a year here, so the extra spend stays unrecovered. That's Portage's own climate and rates talking, not a hedge or a caveat.
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Portage is one of 3206 cities covered here, each run through the same model. Search another below.
Portage's weather, in the numbers that matter
4965 heating degree days pile up here every year, so Portage has a real but manageable winter; the cooling side runs to 900 cooling degree days, where summers add a moderate cooling load. Sizing runs off the design temperature, not the average day: 1.9°F here (coldest 2024 reading -7.1°F), which works out to a seasonal COP of 2.75 for the cold-climate class of unit this climate calls for. Portage 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. These numbers come from Klmazo/Btl Creek International Airport, the closest NOAA station, 3.3 miles out.
What it actually costs to run, year to year
Modelled on a typical 2000-square-foot house, the heat pump draws about 4,572 kWh a year to keep it warm, plus cooling, for a combined electric bill near $1,106 a year. Portage's gas rate of $10.92 per Mcf, applied to the 52 Mcf a year the furnace burns, puts the current furnace-and-AC running cost near $806 a year, against 20.72¢ per kWh for electricity. Because the heat pump costs more to run here, the gap only widens with time: $9,999 behind after 15 years compared with replacing the furnace and AC like-for-like.
How sensitive Portage's result is to prices
For the verdict in Portage to flip, electricity would need to drop to about 13.5¢/kWh from 20.72¢, or gas climb past $16.72 per Mcf from $10.92. A utility offering a lower heat pump rate can change this. Until then, no quote price makes a heat pump pay back against gas in Portage; the case for one here rests on comfort, cooling, or replacing electric heat instead.
The other scenario: no gas furnace to begin with
Gas isn't universal in Portage, many houses run on electric heat already. Swap the comparison to resistance heat instead of gas, and Portage's answer improves. The saving here runs about $1,740 a year, which recovers the extra $10,000 spent going electric in roughly 5.7 years.
Where Portage ranks in this dataset
Ranked against the other 3206 cities covered, Portage comes in at 793 for heating severity, 1 would be the coldest place in the dataset, and 818 by population, where 1 is largest. That's the coldest third of the dataset, where climate does most of the work behind this figure.
Deciding what's next in Portage, MI
Portage, Michigan is home to about 49,975 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 Portage, nothing is lost by holding off until the current equipment genuinely fails.
Ask a local HVAC contractor for a quote before committing either way.
Reading further on this page's numbers
The methodology guide walks through exactly how Portage's 2.75 seasonal COP and the rest of this page's numbers get built. At a 1.9°F design temperature, Portage sits in cold-climate territory; the guide to that class of unit explains why.