The FKU is a compact multi fuel appliance delivering performance in an extremely safe and effective way and is the ideal partner to the range of Windhager appliances.
Many years of experience in manufacturing natural draught boilers have been optimised and implemented in the FKU. The result is a particularly robust heating solution that offers convincing functions and efficiency - a sturdy boiler that lasts and lasts.
FKU incorporates large filling doors for ease of loading and a sizable combustion chamber allowing sustained slow burning periods.
| Type | Solid fuel natural draught boiler |
| Fuel | Wood, Solid fuel |
| Output | 12.7 – 32.6 kW |