What is a GC Number?

G.C. Number stands for "Gas Council" number. During it's period as the sole national distributor of natural gas, British Gas created a council of General, Municipal Boilermakers.

Part of their responsibilities was to log all boilers manufacturered and/or sold within the UK.

A GC Number is made up of 7 different digits set out in this format XX-XXX-XX

The significance of the groups of digits is as follows.

First two digits. 00-000-00

* The first digit specifies the main type of appliances.

* The second digit specifies the type of appliance within the type

Next three digits. 00-000-00

* The next three digits stand for the name of the manufacturer.

Last two digits 00-000-00

* The last two digits cover the model

Below is a list of Appliance Types (as defined in the first 2 digits) - this list is not exhaustive

11 = Cooker Grill

31 = Gas Fire

35 = Flued Convector Unit

37 = Back Boiler Unit

41 = Central heating Boiler

42 = Warm Air Heater

44 = Back Boiler Fire

47 = Combination Boiler (Combi)

51 = Instantaneous Water Heater

53 = Circulator