Heat pump vs Furnace in St. Charles County, Missouri
When a heat pump makes sense
If you already have gas at the house and are deciding whether to switch, the running cost favors the heat pump here, about 15% less than natural gas at Missouri prices. Winter nights average 25°F through the season, and a standard heat pump loses heating power at that temperature, so look at a cold-climate model built to hold its output in the cold. It also covers your cooling, so you are not running a separate system for summer.
When a furnace makes sense
If your house already has gas line and ductwork set up for a furnace, staying with one is the simpler path, and most homes in this region still heat this way. A furnace does not lose heating power as the temperature drops, which matters on the coldest nights here. It only handles heat, though, so you would still need a separate system to cool the house.
When a heat pump makes sense
If you already have gas at the house and are deciding whether to switch, the running cost favors the heat pump here, about 15% less than natural gas at Missouri prices. Winter nights average 25°F through the season, and a standard heat pump loses heating power at that temperature, so look at a cold-climate model built to hold its output in the cold. It also covers your cooling, so you are not running a separate system for summer.
When a furnace makes sense
If your house already has gas line and ductwork set up for a furnace, staying with one is the simpler path, and most homes in this region still heat this way. A furnace does not lose heating power as the temperature drops, which matters on the coldest nights here. It only handles heat, though, so you would still need a separate system to cool the house.
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
Heat pump wins in St. Charles County.
A heat pump costs about 15% less to run than gas here, and most homes in the county are new enough to suit one well.
If your home has a gas line already and you do not need cooling too, a furnace is still the simpler choice.
Find a contractor| Compared on | Heat pump | Furnace |
|---|---|---|
| Cost to run here | About 15% less to run | Costs more 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 25°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
If you already have gas at the house and are deciding whether to switch, the running cost favors the heat pump here, about 15% less than natural gas at Missouri prices. Winter nights average 25°F through the season, and a standard heat pump loses heating power at that temperature, so look at a cold-climate model built to hold its output in the cold. It also covers your cooling, so you are not running a separate system for summer.
When a furnace makes sense
If your house already has gas line and ductwork set up for a furnace, staying with one is the simpler path, and most homes in this region still heat this way. A furnace does not lose heating power as the temperature drops, which matters on the coldest nights here. It only handles heat, though, so you would still need a separate system to cool the house.
A St. Charles County contractor will price both against your own house, your ductwork and your panel.
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