home systems
Furnace
Definition: A heating system that warms air and distributes it throughout your home via ductwork.
A furnace is a central heating system that generates heat, warms air, and distributes it through your home via ductwork and vents.
Types of Furnaces:
Gas Furnace:
- Most common in cold climates
- Burns natural gas or propane
- Very effective in extreme cold
- Requires gas line connection
Electric Furnace:
- Uses electric heating elements
- No combustion, no venting needed
- Higher operating costs than gas
- Good where gas unavailable
Oil Furnace:
- Burns heating oil
- Common in Northeast U.S.
- Requires oil tank and delivery
Key Components:
- Burners (gas/oil) or heating elements (electric)
- Heat exchanger
- Blower motor
- Filter
- Thermostat connection
- Exhaust flue (gas/oil)
Efficiency Ratings (AFUE):
- Minimum standard: 80% AFUE
- High efficiency: 90-97% AFUE
- Higher AFUE = more heat from fuel = lower bills
Lifespan:
Maintenance:
- Replace filter monthly during heating season
- Professional inspection annually
- Check carbon monoxide detectors
- Keep vents clear and unobstructed
Safety:
Related Terms
HVAC
Heating, Ventilation, and Air Conditioning—your home's climate control system.
BTU (British Thermal Unit)
A unit of heat measurement used to rate the capacity of heating and cooling equipment.
Heat Pump
An HVAC system that can both heat and cool your home by transferring heat between indoors and outdoors.
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