BIOmass boilers -- Farmer version can operate with wood pelet mode. The fuel container filled and the cinder is removed manually.

The nominal power is 40kW (35.000kcal/h) what measured with average fuel with 15BTU(17MJ/kg,4000kcal/kg). The efficiency of Farmer 40 boilers is in the range of 80-85% depending on fuel quality. The ash content of different fuels can be up to 20%!!

According to operation modes, this is hot water boiler (3bar 95°C). With separate hot exchanger it also provides domestic hot water. For the installation need standard flue.

The installation has to be carried out following the relevant technical and local regulations. In closed heating systems a safety walve max.3bar is necessary. We recommend to use buffer accumulator . The boiler can be used with all kind of pipework, water pumps or heat exchanger. In order to avoid corrosion, keep the return water temperature high, it should be typically 60-70°C. Use a mixing valve to ensure this.

The Farmer boilers review.

Technical data


Recommend minimum distances:   a: 100mm   b: 600mm    c: 800mm   d: 1200mm

The levers are positioned on the right hand side when facing the fuel container. Leave 0,8m (dim. C) for opening the cinder door and for emptying. Leave adequate space of 1-2m (dim. D) in front of the fuel container for filling. Leave min. 0.6m at the back of the boiler (dim. B) for the flue outlet and for plumbing. The left side of the boiler (dim. A) should be at least 0.1m from the wall. The fuel container door extends 0.2m above the boiler when opened.