Ключевые слова:
Combustion|Ventilation ductwork|Performance|Town gas|Draughts|Flued heaters|Safety devices|Fans|Temperature measurement|Performance testing|Test equipment|Leak tests|Radiant heaters|Gas space heating|Combustion products|Heat measurement|Thermal efficiency|Flames|Gas-powered devices|Life (durability)|Ignition systems (heat engineering)|Scratch tests|Durability|Designations|Industrial|Electrical safety|Classification systems|Heating equipment|Temperature-rise limit|Air heaters|Convection heaters|Heaters