An unfinished basement containing a metal furnace with ductwork, exposed wooden joists on the ceiling, cardboard boxes, a coiled cable, and a single hanging incandescent bulb.

Furnace vs Boiler in Montgomery County, Pennsylvania

When a furnace makes sense

A furnace fits a home that already has ductwork in place, since the same ducts can carry cool air in summer if you ever add air conditioning. It heats up fast once you turn up the thermostat, which matters when nights average 25°F through the winter. With about 7 months of heating a year here, that quick response gets used a lot.

When a boiler makes sense

A boiler makes sense if your home already has radiators or in-floor piping rather than ducts. It runs about 5% cheaper than a furnace at Pennsylvania gas prices, and with 7 months of heating a year that difference adds up. The heat also stays steadier through the cold nights here, since it isn't switching air on and off to hold the temperature.

When a furnace makes sense

A furnace fits a home that already has ductwork in place, since the same ducts can carry cool air in summer if you ever add air conditioning. It heats up fast once you turn up the thermostat, which matters when nights average 25°F through the winter. With about 7 months of heating a year here, that quick response gets used a lot.

When a boiler makes sense

A boiler makes sense if your home already has radiators or in-floor piping rather than ducts. It runs about 5% cheaper than a furnace at Pennsylvania gas prices, and with 7 months of heating a year that difference adds up. The heat also stays steadier through the cold nights here, since it isn't switching air on and off to hold the temperature.

An unfinished basement containing a gray HVAC furnace with ductwork, exposed wooden joists, a concrete floor, and miscellaneous clutter in one corner.

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

A gray boiler with copper and black iron pipe connections stands against a concrete basement wall, with a water heater and storage shelving visible in the background.

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 Montgomery County.

In the Mid-Atlantic, 51.4% of homes heat with a furnace, so just over half already have the ductwork it needs.

About 5% lessto heat with a boiler than with a furnace, at Pennsylvania prices
25°Faverage winter low
52%of homes here heat with gas

If your home already has radiators or in-floor heating pipes instead of ducts, a boiler is still the better fit.

Find a contractor
Compared onFurnaceBoiler
Cost to run hereCosts more to runAbout 5% less to run
What it doesHeats onlyHeats only
Homes in the Mid-Atlantic that heat with one51.4%27.9%
Handles a 25°F nightYesYes

Sources: U.S. Energy Information Administration, U.S. Department of Energy, NOAA

When a furnace makes sense

A furnace fits a home that already has ductwork in place, since the same ducts can carry cool air in summer if you ever add air conditioning. It heats up fast once you turn up the thermostat, which matters when nights average 25°F through the winter. With about 7 months of heating a year here, that quick response gets used a lot.

When a boiler makes sense

A boiler makes sense if your home already has radiators or in-floor piping rather than ducts. It runs about 5% cheaper than a furnace at Pennsylvania gas prices, and with 7 months of heating a year that difference adds up. The heat also stays steadier through the cold nights here, since it isn't switching air on and off to hold the temperature.

A Montgomery County contractor will price both against your own house, your ductwork and your panel.

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