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boiler
Device in which water is heated before being distributed to the radiators.
heat exchanger
Set of pipes transferring the heat produced by combustion to the water.
heating element
Conduit in which the water is heated.
aquastat
Device regulating the water temperature.
pressure relief valve
Mechanism for releasing pressure by letting off excess water or steam.
burner
Device for mixing a flammable substance with air, and fanning and igniting this mixture in a boiler’s fire pot.
air tube
Cylindrical part covering the nozzle and the ignition electrodes; it joins the burner to the fire pot.
fire pot
Part of the boiler where the combustion of air and heating oil takes place after they pass through the burner.
draft hole
Peephole for viewing the inside of the fire pot.
insulation
Material covering the sides of the boiler to reduce heat loss.
box
Rigid metal casing for the boiler.
chimney
Channel through which combustion gases are evacuated.