BS 7977-1:2009+A1:2013 - Page 3

Specification for safety and rational use of energy of domestic gas appliances. Radiant/convectors | Status: Confirmed, Current

1 Scope 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:

• • fireplace recess;
• • builder’s opening;
• • metal flue box to BS 715;
• • pre-cast flue to BS EN 1858.

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:

• • radiant/convectors;1)
• • live fuel effect (LFE);1)
• • inset live fuel effect (ILFE);1)

  NOTE An inset live fuel effect fire with a top outlet flue spigot that is directly connected to the flue is not within the scope of this standard.

This document does not apply to the following:

• • decorative fuel effect appliances;
• • catalytic combustion appliances;
• • appliances in which the supply of combustion air and/or the evacuation of the products of combustion is achieved by mechanical means;
• • appliances which permit automatic ignition whilst unattended.

This standard is only intended for type testing.