Is a heat pump worth it in St. Michael?

In St. Michael, a heat pump would cost more to run each year than what you have now. $3,500 is what St. Michael would pay extra to go electric rather than replace the furnace and AC with the same again, once the $2,000 federal credit is applied. The heat pump would cost about $273 more a year to run than the furnace it replaces — a premium with no payback. That's St. Michael's own climate and rates talking, not a hedge or a caveat.

St. Michael's weather, in the numbers that matter

Degree days tell the story here: St. Michael racks up 6678 heating degree days each year (base 65°F), and summers add a moderate cooling load, with 524 cooling degree days on the cooling side. Sizing runs off the design temperature, not the average day: -9.4°F here (record low -14.8°F), which works out to a seasonal COP of 2.47 for the cold-climate class of unit this climate calls for. St. Michael 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 BUFFALO MUNICIPAL AIRPORT, 8 miles from St. Michael — the closest one on record.

St. Michael's running-cost comparison, in dollars

A 2000-square-foot house here would pull roughly 6,846 heating kilowatt-hours annually on top of cooling, totalling about $1,143 a year on electricity. The gas furnace it replaces burns roughly 70 Mcf a year at 10.98 per Mcf here, for a running cost near $870 a year (electricity here runs 15.67¢/kWh). Buy it outright, not incrementally, and payback stretches to beyond the 15-year equipment life; over 15 years the net position sits $7,591 behind.

Electric resistance heat in St. Michael, compared

Gas isn't universal in St. Michael — many houses run on electric heat already. Swap the comparison to resistance heat instead of gas, and St. Michael's answer improves. About $1,613 a year comes back this way, enough that the 5-year payback clears the $8,000 premium comfortably within the equipment's life.

St. Michael against the rest of the country

Ranked against the other 3206 cities covered, St. Michael comes in at 68 for heating severity — 1 would be the coldest place in the dataset — and 1805 by population, where 1 is largest. That's the coldest third of the dataset, where climate does most of the work behind this figure.

Next step for 21,681 people in St. Michael

St. Michael, Minnesota is home to about 21,681 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 St. Michael, 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

The methodology guide walks through exactly how St. Michael's 2.47 seasonal COP and the rest of this page's numbers get built. St. Michael's -9.4°F design temperature falls on the cold side of the 25°F cutoff the cold-climate unit guide walks through.