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BS 4834:1990 British Standard Specification for Inset open fires without convection with or without boilers, burning solid mineral fuels, Incorporating Amendment No. 1

Up-to date information, and printed copies, can be purchased from National Standards Organizations, such as: BSI or NSAI, or your local library may offer online access at no direct cost to you. See also Test Laboratories, Standards and CE Marking.

Although European Standard EN13229 Inset Stoves now covers open fires, this National Standard has been retained to define the coal burning air-controlled open fire units for fitting into a traditional British or Irish fireplace to BS 1251. The standard also includes a specification for back boilers and built-in gas ignition burners.

Amongs other provisions, an open fire to this Standard will be:

Of its nominal width (usually 400mm (16) but occasionally 350, 450 or 500mm) +0-3mm.
Have means of fixing it in place.
Have a grate with firebars 13mm +/-2mm apart
Have a minimum fuel capacity of 2.1dm³
Have an ashpan and a controlled undergrate air supply
A standard tapered 400mm fire burning 1.13kg per hour of soft coke will give out at least 3.2kW of radiant heat.
Will have an efficiency above 35%, or above 50% with a back boiler.
A fire classed as 'overnight burning' will have demonstrated an ability to burn unattended for at least 10 hours.

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