Ключевые слова:
Overhead, Instructions for use, Leak tests, Automatic control systems, Safety measures, Air heaters, Equipment safety, Gas-powered devices, Flues, Industrial, Commercial, Radiant heaters, Classification systems, Ignition systems (heat engineering), Heating equipment, Multiple, Conformity, Performance testing, Marking, Heaters, Pipe connections, Thermal testing, Combustion products, Testing conditions, Performance, Fire safety, Burners, Gas space heating