The combustion chamber is made of 15 mm thick steel plate, which is protected from direct heat with a 50 mm of refractory insulation. The external fluid space is surrounded by a 200 mm thick insulation. The combustion is controlled by a fan and air piston on the basis of the water temperature sensor, the flue gas temperature sensor and built-in oxygen probe. In order to achieve maximum efficiency the exhaust gas passes through 16 hose placed in the fluid space.

The combustion chamber is made of 15 mm thick steel plate, which is protected from direct heat with a 50 mm of refractory insulation. The external fluid space is surrounded by a 250 mm thick insulation. The combustion is controlled by a fan and air piston on the basis of the water temperature sensor, the flue gas temperature sensor and built-in oxygen probe. In order to achieve maximum efficiency the exhaust gas passes through 16 hose placed in the fluid space.

The combustion chamber is made of 15 mm thick steel plate, which is protected from direct heat with a 50 mm of refractory insulation. The external fluid space is surrounded by a 200 mm thick insulation. The combustion is controlled by a fan and air piston on the basis of the water temperature sensor, the flue gas temperature sensor and built-in oxygen probe. In order to achieve maximum efficiency the exhaust gas passes through 16 hose placed in the fluid space.

The combustion chamber is made of 15 mm thick steel plate, which is protected from direct heat with a 50 mm of refractory insulation. The external fluid space is surrounded by a 300 mm thick insulation. The combustion is controlled by a fan and air piston on the basis of the water temperature sensor, the flue gas temperature sensor and built-in oxygen probe. In order to achieve maximum efficiency the exhaust gas passes through 26 hose placed in the fluid space.

The combustion chamber is made of 15 mm thick steel plate, which is protected from direct heat with a 50 mm of refractory insulation. The external fluid space is surrounded by a 300 mm thick insulation. The combustion is controlled by a fan and air piston on the basis of the water temperature sensor, the flue gas temperature sensor and built-in oxygen probe. In order to achieve maximum efficiency the exhaust gas passes through 28 hose placed in the fluid space.

The combustion chamber is made of 15 mm thick steel plate, which is protected from direct heat with a 50 mm of refractory insulation. The external fluid space is surrounded by a 300 mm thick insulation. The combustion is controlled by a fan and air piston on the basis of the water temperature sensor, the flue gas temperature sensor and built-in oxygen probe. In order to achieve maximum efficiency the exhaust gas passes through 34 hose placed in the fluid space.