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Type A and Type B appliance definitions

The acceptance process for a gas appliance depends on whether it is classified as a Type A appliance or a Type B appliance. Type A and Type B are classifications that are defined in the Gas Safety Act 1997External Link .

Type A appliances

The Act defines a type A appliance as:

  • An appliance (including a second-hand appliance) for which an acceptance scheme has been authorised by ESV in accordance with section 68, or
  • An appliance that has been accepted under section 69.

Domestic and light commercial type appliances, such as cookers, space heaters, central heaters, water heaters, catering equipment and leisure appliances, are type A appliances. Type A appliances are typically limited to a gas input of 1000MJ/h.

Refer to Appliance acceptance submissions for details on the type A submission process.

Type B appliances

The Act defines a type B appliance as an appliance (including a second-hand appliance) with gas consumption in excess of 10MJ/h, including any components and fittings downstream of and including the appliance manual shut-off valve, but does not include a Type A appliance.

Refer to Appliance acceptance submissions for details on the type B submission process.

Date: 21/04/2024 20:19

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Reviewed 29 January 2023

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