• Fire metal box boilers of Bohargostar Tabarstan company (metal boiler); Steel fire tube boilers are three pass (wet back)
  They are produced up to 1000 hr/Kcal capacity.
• This type of boilers are much smaller than three-pass steel boilers and return furnaces and have a unique design
  It is the highest thermal efficiency.

Internal components of the device:

• – A main furnace that is the central heat input of the boiler (pass 1).
• The chamber is at the end of the main furnace and a number of middle tubes are connected to it and the front plate of the boiler (pass 2).
• The upper tubes are at the highest level of the network and have the task of heat transfer in the final stage (pass 3).

In the design of this boiler, it has been tried to place the exhaust at the lowest point and due to the lightness of the hot air mass and its passage
Between the large number of tubes and the furnace, the most thermal contact has occurred in the boiler, and the exhaust output will reach the lowest temperature (compared to normal boilers), and more contact of the fluid with these points will increase the thermal efficiency (92-89%).

In case of order and request from dear customers, its condensing design is also produced and supplied.

Important note: Due to the use of imported sheets with special alloy in condensing boilers, its initial cost (production) is very high, and its production is subject to order registration and has no economic justification.