2521 - Manufacture of central heating radiators (except electric radiators) and hot water boilers (boilers) - 548 Manufacturers List

252111 - Central heating radiators not electrically heated made of iron or steel - 127 Manufacturer
252112 - Central heating boilers (boilers) to produce hot water or low pressure steam (including combi boiler - 349 Manufacturer
252113 - Parts of central heating boilers (boilers) and combi boilers - 72 Manufacturer