Abstract: Burning stove (1) combined with a Stirling engine (2) for producing electricity or to be coupled to a heat pump where the heater of said Stirling engine (3) is placed inside the stove (1), that comprises t o or more burners (4) arranged on the same plan and that the axis of the heater (3) of the Stirling engine (2) passes through the barycenter of said t O or more burners (4). The stove can be advantageously a pellet stove with one or more heat exchangers (8).

Abstract: Heat exchanger for thermo boiler 1 with a tube bundle 6 using solid fuel in particles constituted from an inner furnace 7 and a double wall jacket connected from the tube bundle 6 characterized by the fact that space 14 over the inner furnace 7 and the tube bundle 6 is divided from a slab 13, that tubes 6 which cross said slab 13 in openings 15 are rigidly fixed to said slab 13, that at least a bar 10, 11 which can be controlled from outside crosses the slab 13 and the double wall jacket 20 on at least one side, that said bar/s 10, 11 bring/s at least two scraping plates 8 and 9, of which an at least intermediate one positioned on one side of said slab 13 and at least an other one from the opposite part of slab 13, of which at least one positioned at the end of tubes 6.

Abstract: Maintenance drawer for the combustion chamber and smoke aspiration fan of the flue of a bio-mass powered thermal boiler, characterised by the fact that it is inserted into the front part of the thermal boiler, that it has two compartments, that one compartment is situated under the furnace to collect the ashes, that the other compartment is situated under the aspiration fan to collect the dust contained in the smoke from combustion.

Abstract: Inspection and maintenance drawer for the exhaust of fumes of the flue of a bio-mass powered thermal boiler, characterised by the fact that it has a closing and grasping element situated in the front part of the thermal boiler, and of an extended element which presents a compartment at its extremity, situated at the base of the flue of the thermal boiler.

Abstract: Heat exchanger for thermo boiler 1 with a tube bundle 6 using solid fuel in particles constituted from an inner furnace 7 and a double wall jacket connected from the tube bundle 6 characterized by the fact that space 14 over the inner furnace 7 and the tube bundle 6 is divided from a slab 13, that tubes 6 which cross said slab 13 in openings 15 are rigidly fixed to said slab 13, that at least a bar 10, 11 which can be controlled from outside crosses the slab 13 and the double wall jacket 20 on at least one side, that said bar/s 10, 11 bring/s at least two scraping plates 8 and 9, of which an at least intermediate one positioned on one side of said slab 13 and at least an other one from the opposite part of slab 13, of which at least one positioned at the end of tubes 6.

Abstract: Double fuel burning stove formed by an external casing, characterised by the fact that said stove is composed of two hearths, a first hearth (4) for one fuel and a second hearth (5) for a second fuel, the second hearth (5) being placed above the first hearth (4) and the second hearth (5) is completely separated from the first hearth (4).