Furnace vs Boiler in Shelby County, Tennessee
When a furnace makes sense
A furnace makes sense if your house already has ductwork in place, since it heats by pushing warm air through those ducts. Winters here are short, only about five months of real heating, and nights average 34°F rather than deep cold, so you are not asking the furnace to work hard for long. If your ducts are in good shape, the furnace is the simpler match for this climate.
When a boiler makes sense
A boiler fits a home with radiators or in-floor piping already installed rather than ducts. It runs on natural gas and heats about 5% cheaper than a furnace at Tennessee prices, which matters more if your house holds heat unevenly or you keep it running for stretches through those five winter months. If your home was never set up for ducted air, the boiler is the one that works with what you already have.
When a furnace makes sense
A furnace makes sense if your house already has ductwork in place, since it heats by pushing warm air through those ducts. Winters here are short, only about five months of real heating, and nights average 34°F rather than deep cold, so you are not asking the furnace to work hard for long. If your ducts are in good shape, the furnace is the simpler match for this climate.
When a boiler makes sense
A boiler fits a home with radiators or in-floor piping already installed rather than ducts. It runs on natural gas and heats about 5% cheaper than a furnace at Tennessee prices, which matters more if your house holds heat unevenly or you keep it running for stretches through those five winter months. If your home was never set up for ducted air, the boiler is the one that works with what you already have.
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
Boiler
- 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 Shelby County.
Most homes here already have the ductwork from 1977, and a furnace uses that instead of adding radiators or pipes for a boiler.
If your home already has radiators or in-floor heating loops instead of ductwork, a boiler is still the better choice.
Find a contractor| Compared on | Furnace | Boiler |
|---|---|---|
| Cost to run here | Costs more to run | About 5% less to run |
| What it does | Heats only | Heats only |
| Handles a 34°F night | Yes | Yes |
Sources: U.S. Energy Information Administration, U.S. Department of Energy, NOAA
When a furnace makes sense
A furnace makes sense if your house already has ductwork in place, since it heats by pushing warm air through those ducts. Winters here are short, only about five months of real heating, and nights average 34°F rather than deep cold, so you are not asking the furnace to work hard for long. If your ducts are in good shape, the furnace is the simpler match for this climate.
When a boiler makes sense
A boiler fits a home with radiators or in-floor piping already installed rather than ducts. It runs on natural gas and heats about 5% cheaper than a furnace at Tennessee prices, which matters more if your house holds heat unevenly or you keep it running for stretches through those five winter months. If your home was never set up for ducted air, the boiler is the one that works with what you already have.
A Shelby County contractor will price both against your own house, your ductwork and your panel.
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