Brand: DEFRO
Product Code: as_DO_SIGMAE12L_339
Availability: Pre-Order
€4,739.02 Ex Tax: €3,852.86


Boilers with an automatic fuel feeder and a burner adapted for burning biomass in the form of pellets. They are equipped with an innovative controller that supports 4 pumps and a mixing valve, and the controller also enables the connection of GSM control modules.
The boiler's construction is based on a highly efficient heat exchanger made of certified boiler steel. In order to increase the efficiency of combustion and reduce the emission of pollutants over the automatic furnace, there are ceramic shelves and economizers in vertical exhaust lines. The boilers meet the class 5 energy and emission requirements. PN EN 303-5: 2012 standards.

Basic fuel:wood pellets 6-8mm
Torch:pellet burner with automatic cleaning function as standard
5 years warranty for leak tightness of the heat exchanger, 2 years for the remaining elements and efficient boiler operation.
Heat exchanger made of certified high-grade steel.
High thermal efficiency up to 90% thanks to increased heat recovery from flue gas.
APC 3 ADAPTIVE CONTROL controller supporting 6 pumps / c. o. , c. w. u. , obiegowa, podłogowa /. Control of two mixing valves. viewing and changing the parameters of the ONLINE main controller via the built-in Internet module with the RJ-45 socket.
NZ version - adapted for assembly in a closed system, reinforced structure, built-in cooling coil - optional extra charge.
Pellet burner with automatic cleaning function as standard.
The fuel reserve sensor in the tank stops the boiler operation at the minimum fuel level. After recharging the fuel, there is no need to repeat the ignition procedure and the boiler goes into automatic operation.
The system of mechanical cleaning of the heat exchanger.
ADAPTIVE CONTROL control - regulation of boiler operation based on air flow through the exchanger.
Ceramic catalysts stabilizing the combustion process.
Automatic fuel ignition system.
Exhaust fan that eliminates chimney draft and stabilizes boiler operation.
Twin Spark System - pellet burner as standard equipped with two igniters - option available for power.

Standard equipment:APC 3 ADAPITVE CONTROL controller, ADAPTIVE CONTROL control, Internet module, leveling feet, igniter, exhaust fan, mechanical exchanger cleaning system, pellet burner with automatic cleaning function.

Optional equipment - at extra charge:GSM module, WIFI internet module, NZ version for closed system, DK LOGIC 100 regulator, DEFRO SPK Lux room regulator, DEFRO MZ module, SPK Lux wireless regulator, RS wireless communication set.


  • innovative ADAPTIVE Control with the use of a turbine flowmeter that ensures optimal selection of fan and feeder operation parameters
  • fan control (examination of air flow necessary for the proper combustion process) and feeder
  • central heating pump control. And CWU valves
  • control of two mixing valves along with circulating pumps assigned to them
  • control of two additional devices, e.g.. circulating pump, additional pump c. o.
  • automatic firing and extinguishing of the boiler
  • weekly control
  • control via the Internet (remote firing and blanking) bywebsite. emodul. en
  • the possibility of connecting a room regulator with traditional communication or RS, e.g.. SPK LUX
  • the possibility of connecting the ST-65 GSM module
  • lighting using a heater
  • measurement of fuel consumption with the use of a volumetric sensor normally mounted in a fuel tank
  • possibility of controlling 2 additional mixing valves by means of the DERFO MZ module
  • large color graphic display
  • control panel placed in a console with an adjustable tilt angle
  • CO temperature sensor. DHW. valves. external return and exhaust
  • photoresistor (flame sensor)
  • has a temperature protection STB
  • has thermal protection of the burner

1The maximum area of ​​heated rooms has been estimated for a unit
heat demand q = 70 W / m2.
2Capacity of the fuel tank for bulk density of pellets amounting to 0.6 kg / dm3.
3The weight of the boiler depends on its additional equipment.

The height of the boiler can be additionally adjusted using the attached feet.
The feet have a regulation range from 38 to 50mm.

ATTENTION! When ordering a SIGMA EKOPELL boiler, specify on which side the hopper should be located (left or right).

Adaptation of the SIGMA EKOPELL boiler to the closed system (NZ version) should be reported when ordering the boiler due to the impossibility of subsequent installation.


Product available on request. Delivery costs set individually, please email, use contact form or call us to determine the cost of delivery.

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