Ключевые слова:
Safety valves|2nd family gases|Instructions for use|Design|Flues|Automatic control systems|Combustion|Performance testing|Classification systems|Heaters|Performance|Abrasion|Flued heaters|Gas-powered devices|Leak tests|Marking|Convection heaters|Test equipment|Testing conditions|Designations|Gas space heating|Industrial|Safety engineering|Heat|Air|Flames|Combustion products|Ignition systems (heat engineering)|Air heaters|Weather resistance|Fire safety|Artificial weathering tests|Flow rates|Flow measurement|Gas valves|Burners|Thermal efficiency|Commercial|Heat exchangers|Warm-air heating|Gas flow|Temperature control