Forced Air
A Forced hot air furnace generates heat by burning fuel and distributes the generated heat throughout the house.
How it Works
As the name implies, it uses hot air to carry heat through the house. Rooms have a cold air intake vent, which allows cool air to be sucked down into the furnace. Once there, it is heated using natural gas, propane, oil, or electricity.
Forced Hot Air Systems use Heat Grills Like These.
They come in many designs, colors and sizes to choose from.
Air Circulation cycle
A forced-air furnace heats your home through a heating cycle that looks like this:
Oil, Electricity, Natural gas, or propane is ignited in the burner.
The flames heat up a metal heat exchanger and exhaust out of the flue.
The heat exchanger transfers its heat to the incoming air.
The furnace's blower forces the heated air into the ductwork and distributes it throughout the home.
As the warm air fills each room, the colder, denser air is drawn back into the furnace via the return ducts, repeating the process.
Components
All furnaces consist of four main components:
1. Burners that deliver and burn fuel.
2. Heat exchangers.
3. A blower.
4. And a flue that acts as an exhaust for gaseous by-products.