Gas-fired central heating boilers. Specific standard for type B1 appliances|Pipe fittings, Temperature-rise limit, Gas-powered devices, Domestic, Thickness, Aluminium, Flues, Cast-iron, Thermal insulation, Design, Performance testing, Control devices, Copper, Gas pipes, 1st family gases, Type testing, Ignition systems (heat engineering), Marking, Leak tests, Safety devices, Endurance testing, Test pressure, Performance, Hot-water central heating, Steels, Control systems, 2nd family gases, Pressure regulators, Gas valves, Hydraulic tests, Thermal efficiency, Heating equipment, Instructions for use, Combustion products, Gas space heating, Central heating, Testing conditions, Boilers, Classification systems, Safety valves, Welded joints, Grades (quality), Hot-water boilers, Pressure, 3rd family gases, Strength of materials, Temperature controllers, Test equipment