Tracked Changes. Electrical equipment for furnaces and ancillary equipment. Requirements for application design and installation|Error detection, Circuits, Gas-powered devices, Electric conductors, Installation, Switches, Safety devices, Documents, Computer hardware, Computer software, Hot-water central heating, Warm-air heating, Electric cables, Maintenance, Heat exchangers, Protected electrical equipment, Electrical connections, Turbines, Furnaces, Auxiliary, Heating equipment, Electrical equipment, Combustion chambers, Electrical protection equipment, Electrical safety, Steam boilers, Flow charts, Earthing, Stationary