Heat pump vs Furnace in St. Louis County, Minnesota
When a heat pump makes sense
A heat pump makes sense if you want air conditioning as part of the same system and you're set on cutting gas out of the picture entirely. Get a cold-climate model, since standard heat pumps lose heating power once temperatures drop, and St. Louis County winter nights average 1°F from December through February. Even a cold-climate unit will run alongside a backup heat source on the coldest nights, and you'll pay more to run it than a furnace at Minnesota gas and electric prices.
When a furnace makes sense
A furnace is the right call for most homes here. It's built to keep up on nights at 1°F without losing capacity, and with heat needed about 10 months a year, that matters. Natural gas runs at least 35% cheaper than a heat pump at Minnesota prices, which is part of why 51% of homes in the county already heat with gas. The tradeoff is that a furnace only heats, so you'd still need separate air conditioning for summer.
When a heat pump makes sense
A heat pump makes sense if you want air conditioning as part of the same system and you're set on cutting gas out of the picture entirely. Get a cold-climate model, since standard heat pumps lose heating power once temperatures drop, and St. Louis County winter nights average 1°F from December through February. Even a cold-climate unit will run alongside a backup heat source on the coldest nights, and you'll pay more to run it than a furnace at Minnesota gas and electric prices.
When a furnace makes sense
A furnace is the right call for most homes here. It's built to keep up on nights at 1°F without losing capacity, and with heat needed about 10 months a year, that matters. Natural gas runs at least 35% cheaper than a heat pump at Minnesota prices, which is part of why 51% of homes in the county already heat with gas. The tradeoff is that a furnace only heats, so you'd still need separate air conditioning for summer.
Heat pump
- Runs on
- Electricity
- What it does
- Heats and cools
- Tax credit
- No federal tax credit since the end of 2025
Sources: U.S. Department of Energy · Internal Revenue Code
Furnace
- Runs on
- Natural gas
- What it does
- Heats only
- Tax credit
- No federal tax credit since the end of 2025
Sources: U.S. Department of Energy · Internal Revenue Code
Furnace wins in St. Louis County.
Winter nights here average 1°F, and a furnace keeps up with that cold while costing at least 35% less to run than a heat pump.
If your home has no gas line and you want cooling and heat from one system, a cold-climate heat pump is still worth a look.
Find a contractor| Compared on | Heat pump | Furnace |
|---|---|---|
| Cost to run here | Costs more to run | At least 35% less to run |
| What it does | Heats and cools | Heats only |
| Homes in the Plains states that heat with one | 5.4% | 77.6% |
| Handles a 1°F night | Standard models lose heating power in the cold; cold-climate models are built for it | Yes |
Sources: U.S. Energy Information Administration, U.S. Department of Energy, NOAA
When a heat pump makes sense
A heat pump makes sense if you want air conditioning as part of the same system and you're set on cutting gas out of the picture entirely. Get a cold-climate model, since standard heat pumps lose heating power once temperatures drop, and St. Louis County winter nights average 1°F from December through February. Even a cold-climate unit will run alongside a backup heat source on the coldest nights, and you'll pay more to run it than a furnace at Minnesota gas and electric prices.
When a furnace makes sense
A furnace is the right call for most homes here. It's built to keep up on nights at 1°F without losing capacity, and with heat needed about 10 months a year, that matters. Natural gas runs at least 35% cheaper than a heat pump at Minnesota prices, which is part of why 51% of homes in the county already heat with gas. The tradeoff is that a furnace only heats, so you'd still need separate air conditioning for summer.
A St. Louis County contractor will price both against your own house, your ductwork and your panel.
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