This standard specifies the requirements and methods of test for the construction, safety, rational use of energy, classification and marking of 2 and 3 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 1289-1.
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.
—Live fuel effect (LFE).
—Inset live fuel effect (ILFE).
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.
note:1) See Definitions.
BS 7977-1:2002 history
2009BS 7977-1:2009+A1:2013 Specification for safety and rational use of energy of domestic gas appliances.Part 1:Radiant/convectors
0000 BS 7977-1:2009
2002BS 7977-1:2002 Specification for safety and rational use of energy of domestic gas appliances - Radiant/convectors