| Descriptors |
Stability, Marking, Combustion products, Design, Flues, Test equipment, Gas space heating, 2nd family gases, Control devices, Safety valves, Electrical safety, Flames, Safety measures, Testing conditions, Gas-powered devices, Overhead, Test pressure, Wear tests, Commercial, Time, Leak tests, Safety devices, Radiant heaters, Fire safety, Classification systems, Heaters, Flued heaters, Ignition systems (heat engineering), Gas valves, Performance testing, Instructions for use, 3rd family gases, Pilot flames, Ignition, Temperature rise, Protective coatings, Installation, Identification methods, Maintenance
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