Domestic solid mineral fuel fired boilers with rated output up to 45 kW - Domestic solid mineral fuel fired boilers with rated output up to 45 kw - Specification for boilers with undergrate ash removal
This Part of BS 4433 specifies the general constructional, dimensional and performance requirements for cast iron and steel hot water heating boilers with rated outputs up to 45 kW and less than 2 bar operating pressure designed to burn solid mineral fuels.
Methods of test for the boilers specified in this Part of BS 4433 are given in Annex A.
Central heating boilers with a working pressure greater than or equal to 2 bar, and central heating boilers with a working pressure less than 2 bar which do not give heat to the room in which they are installed, are excluded from this standard. These central heating boilers are now covered by BS EN 303-5:1999.
The boilers covered by this Part of BS 4433 have the firebed supported on a grate and the ash removed below the grate. The boilers are designed for installation in accordance with BS 8303:1986.
note:1) 1 bar = 10 N/m = 100 kPa.