BS 7977-1:2009+A1:2013

This standard BS 7977-1:2009+A1:2013 Specification for safety and rational use of energy of domestic gas appliances is classified in these ICS categories:

• 97.100.20 Gas heaters

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 15kW 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 in to 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.