Solid fuel boiler FO

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The KÜNZEL solid fuel boiler FO 15 is an “omnivore”. It can be filled with almost any solid fuels.

Wood: roughly chopped wood, wood briquettes or logs up to 1/3 m in length.
Coal: brown coal (briquettes) or hard coal
Coke: grain III.
Peat: lumpy

The FO 15 does not need electric power and is therefore an excellent “emergency” heating. The standard version contains a safety heat exchanger for closed systems.

Unusual for a boiler of this class is the after-burn with hot, adjustable secondary air. The non-water-cooled cast-iron grate enhances the combustion quality.

The FO has a boiler thermometer and three ½” muffs for the thermally controlled outlet safety valve, pump thermostat and filling and draining cock. A ¾” muff is installed for the combustion regulator.
The upward pointing flue and the heat exchanger mean that a low chimney draught has no effect on this burnout boiler and tarring is negligible.

The FO 15 has a nominal output of 14.9 kW and is therefore not subject to the Law on Protection against Harmful Effects on the Environment (BImSchV), i.e. an emissions test is not necessary.

An oil or gas boiler can be placed on top of the solid fuel boiler.

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FO15
shown with heating regulator

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Type FO 15
Output kW 14,9
Volume of filling space Litres 70
Depth of filling space mm 400
Dimensions of filling door W x H mm 380 x 255
Draught requirement Pa 0,16
Water content Litres 68
Weight kg 200
technical data subject to alteration

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