During normal operation, a solid fuel boiler produces specific amounts of fumes at a certain temperature, as declared by the manufacturer. Experience has shown us that incomplete combustion may result in the release of incandescent bodies, which may cause problems to the downstream filtering system. A multi cyclone is installed to resolve this issue, consisting of lots of small cyclones which exploit centrifugal force to separate the coarse part from actual fumes. The flow is then sent to a teflon coated aramid bag filter capable of resisting temperatures of up to  200°C. If this temperature is exceeded, the filter is protected by a by-pass system and relative switching off of aspiration. The entire plant is externally insulated to prevent any condensation phenomena.