When the boiler is not hot and the cause is not related to the package or the engine of the building, or when half of the boiler is cold and the other half is hot, the radiator is ventilated. You have to ventilate it. To drain the air trapped inside the piping network and radiators, turn off the circulator pump and use the radiator vent valve to empty the air inside. Ventilation valves are available in two types, manual and automatic.

you have to use a cm flue duct for sealed room chamber model. It should be noted that this model of the wall-hung boiler, which combustion chamber is closed, is fitted with a special co-axial flue duct and has a fan to discharge the combustion products as well as the required air intake from the outside space. So that the air required for combustion is intaked from the outer tube of flue duct and the combustion product is removed from the internal tube of flue duct. thus does not use the inside air of the building. It is necessary to use a co-axial flue duct to install a sealed room chamber boiler.

The difference between the closed combustion chamber boiler (room sealed) and the conventional boiler is that the combustion chamber is closed and the smoke and air suction action is carried out through a special Co-axial pipe. These models are also equipped with a fan for air in taking to the boiler and to help of Co-Axial pipe to directing combustion products to the outside. In this way, the air quality of the installation site is also maintained. it is possible to install these models with a separate flue pipe and a ventilator instead of a Co-Axial flue duct.

پشتیبانی و خدمات دهی نوین امداد با سال سابقه کار از معتبرترین و باکیفیت ترین تعمیرات محصولات لوازم خانگی را بر عهده دارد . این مرکز با داشتن متخصص‌ترین و با سابقه ترین تعمیرکاران توانسته است. گام به گام با فناوری روز دنیا کار سرویس و تعمیرات را داشته باشد.

معتبرترین و باکیفیت ترین محصولات لوازم خانگی را بر عهده دارد . این مرکز با داشتن متخصص‌ترین و با سابقه ترین تعمیرکاران توانسته است. گام به گام با فناوری روز دنیا کار سرویس و تعمیراترا درتهران ، پردیس ، لواسان، رودهن ، دماوند ، پرند ، اسلام شهر ، پاکدشت ، رباط کریم، نوشهر  عهده‌دار شود.