BS 5871-2:2005

This standard BS 5871-2:2005 Specification for the installation and maintenance of gas fires, convector heaters, fire/back boilers and decorative fuel effect gas appliances is classified in these ICS categories:

• 97.100.20 Gas heaters

This part of BS 5871 specifies installation and maintenance requirements for inset live fuel effect gas fires of heat input not exceeding 15 kW (16.6 kW based on gross calorific value) burning 2nd and 3rd family gases for the purpose of heating rooms or spaces in domestic (see Note 5) or commercial premises. Combined appliances of the type where a fire is used in conjunction with a boiler or circulator are also covered in so far as the installation of the combined appliance is concerned.

The standard is applicable to appliances intended for installation either:

1. within a builder’s opening and/or fireplace recess and which may, additionally, be suitable for installation in a purpose designed metal flue box conforming to BS 715 and flue conforming to the constructional and temperature requirements of BS EN 1856-1 and BS EN 1856-2; or

2. using a direct flue connection, if specified in the manufacturer’s instructions; or

3. in the case of a room sealed appliance, using a flue terminal/air duct assembly supplied by the appliance manufacturer.

This standard covers the selection of a suitable appliance, the ventilation and flueing requirements, and other measures necessary to ensure a safe installation.

The central heating and/or hot water system connected to a combined appliance is not within the scope of this standard and reference should be made to BS 5449 (see Note 6) and BS 5546 for this part of such an installation.

This standard is not applicable to mobile and portable appliances conforming to BS EN 449 or to appliances in touring caravans.

Additional requirements for the installation of fire/back boilers and fire/back circulators are specified in Clauses 15, 16, 17 and 18.

NOTE 1 Inset live fuel effect gas fires differ from decorative fuel effect gas appliances, which burn gas so as to simulate a solid fuel fire or produce other decorative effects, in that they incorporate a heat exchanger and restrict the passage of the products of combustion between the appliance firebed and the chimney or flue. The only decorative fuel effect gas appliances covered by this part of BS 5871 are those shown in Figure 1b) and detailed in 1d) of the commentary and recommendations on Clause 5 of this standard.

NOTE 2 Unless the context requires otherwise, inset live fuel effect gas fires are hereinafter referred to as fires.

NOTE 3 Heat inputs in this document are based on net calorific value. Figures based on gross calorific value are given in parenthesis where deemed necessary. See also Clause 5, commentary and recommendations g).

NOTE 4 Attention is drawn to the foreword concerning the installation of used appliances.

NOTE 5 As well as normally constructed dwellings, domestic premises include any permanently sited caravan holiday homes, residential park homes and permanently moored boats. See IGE/UP/8 [8].

NOTE 6 BS 5449 has been partly replaced by BS EN 12828 and BS EN 12831, and is to be withdrawn once BS EN 14336 and BS EN 14337 are published.