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Pellet heating has recently "spread" all over Europe as pellets become one of the most popular energy sources. Pellets may be described as pressed wood particles looking almost similarly to saw dust which typically have an extremely high specific heat of combustion. This important advantage leads to significant reduction of power consumption. Thus, pellets have certainly become a relatively efficient type of fuel.
Another important advantage of pellet heating systems (comparing to heating systems based on wood, for instance) is a high level of automation.
Every pellet boiler system consists of four main parts:
1. Pellet boiler (Jaspi Pelletti, Jaspi Biotriplex etc);
2. Pellet burner (Ulma 2000, Ulma 3000 etc);
3. Pellet storage tank;
4. Feed screw.
A feed screw transfers pellets from a storage tank to a boiler where those are burnt by a pellet burner in the combustion chamber. The whole process is fully controlled by the burner's thermostat which is mounted on a boiler. Jaspi pellet boilers are also equipped with a 6kW electric heater to ensure the minimal level of heat production in emergency situation and an effective copper coil which is used in domestic hot water production.
Manufacturer Model Power, kW Documents Pic

Pelletti 20 20/6-12*

Pelletti 30 30/6-12

Pelletti XL 30/6-12

Biotriplex 30/25/6**

Ulma 2000 burner 20

Ulma 3000 burner 30

pellet storage tank 250L
* Output power on: pellets/electricity. Boilers are equipped with a 6kW electric heater,
2nd 6kW electric heater as an option;
** Output power on: pellets/wood/electricity.
The boilers may be additionally equipped for gas/oil/wood heating.