An induced draft fan is located in front of a boiler furnace.

A common cause of problems in a hot water system is air in the system.

An induced draft fan is located in front of a boiler furnace.

A measurement of the quantity of heat transfer is the British thermal unit (Btu).

If the bottom line to a gauge glass is closed or clogged, the glass will be empty.

Checking the gauge glass is the quickest way to determine water level in a boiler.

A measurement of the quantity of heat transfer is the British thermal unit (Btu).

Latent heat is heat identified by a change of state and temperature change of a substance.

Latent heat is heat identified by a change of state and temperature change of a substance.

Checking the gauge glass is the quickest way to determine water level in a boiler.