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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:

  • 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.
  • Using a direct flue connection, if specified in the manufacturer’s instructions.
  • 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 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 also specified.

Contents include:

Normative references
Terms and definitions
Exchange of information and planning
Materials and components
Appliance sizing
Appliance fixing
Fire precautions
Gas supply
Electricity supplies and wiring
Ventilation (Fire/back boilers and fire/back circulators only)
Appliance fixing (Fire/back boilers and fire/back circulators only)
Fire precautions (Fire/back boilers and fire/back circulators only)
Water connections (Fire/back boilers and fire/back circulators only)
Instructions and use of fireguards
Advice to be given to the user
Calculation of required heat output of a fire
Calculation of clearance flue flow

BS 5871-2:2005 replaces BS 5871-2:2001 which has been withdrawn.

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