This standard specifies the requirements and methods of test for the construction, safety, rational use of energy, classification and marking of 2nd and 3rd family gas-fired domestic radiant convector heating appliances not exceeding a nominal heat input of 15 kW based on the net calorific value and which incorporate a natural draught burner.

This standard applies to open-flued independent radiant/convector gas fires not connected directly or by means of an adapter to an open flue. The appliance and flue are separated by a void which can be in one or more of the following forms:

The void is covered by a closure plate, which may be an integral part of the appliance, or a separate plate; in either case it is regarded as a part of the appliance and is supplied with it. These appliances are designed to discharge their products of combustion into the void behind the closure plate; they also have an integral flue break which may be in the form of a draught diverter or an open front.

Although all appliances covered by this standard are radiant/convectors, they have traditionally been divided into the following types:

This document does not apply to the following:

This standard is only intended for type testing.