21/30427949 DC

Gaseous fuels, Fire tests, Control devices, Gas valves, Pressure testing, Combustion products, Classification systems, Safety devices, Test equipment, Flames, Flues, Hearths, Leak tests, Maintenance, Conversion, Temperature, Soot, Pipe connections, Burners, Fuel-effect appliances, Temperature measurement, Marking, Gas-powered devices, Thermal testing, Instructions for use, Performance testing, Heaters, Test pressure, Combustion, Ignition systems (heat engineering), Testing conditions