Descriptors | Gas-powered devices, Domestic, Domestic safety, Convection heaters, Heaters, Heating equipment, Gas space heating, Space-heating systems, Flued heaters, 1st family gases, 2nd family gases, 3rd family gases, Classification systems, Testing conditions, Mechanical testing, Stability, Test pressure, Leak tests, Performance testing, Heat, Ignition, Ignition systems (heat engineering), Flames, Flues, Temperature rise, Fire safety in buildings, Manual control systems, Automatic control systems, Electrical safety, Instructions for use, Installation, Maintenance, Draughts, Test equipment, Combustion products, Combustion, Mathematical calculations |