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Gas fired central heating boilers. Type B boilers of nominal heat input exceeding 300 kW, but not exceeding 1000 kW|Classification systems, Hot-water central heating, Fitness for purpose, Marking, Safety devices, Combustion products, Hot-water boilers, Gases, Gas-powered devices, Safety measures, Boilers, Ventilation, Burners, Control systems, Central heating, Type testing, Gas space heating, Efficiency, Energy conservation, Performance
336 GBP
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