Brand: DEFRO
Product Code: as_DO_BIOS10_247
Availability: Pre-Order
€4,662.62 Ex Tax: €3,790.75


No more problems with choosing a pellet boiler for a small boiler room.

  • Fuel tank placed directly above the heat exchanger that minimizes the boiler's dimensions
  • Impressive and high-performance pellet burner made of the best materials with the option of automatic cleaning
  • Levels of the heat exchanger tube
  • Simple operation and maintenance, access to cleaning the heating surfaces through the large front door of the boiler
  • Saving space in the boiler room, the boiler requires only 1 m2
  • Economists in combustion gas trains that increase the precipitation of dust from fumes and increase the degree of heat exchange
  • Low operating costs
  • Exhaust fan that eliminates the problem of improper chimney draft and stabilizes boiler operation

Basic fuel:Wood pellets 6-8 mm in diameter
Torch:pellet burner with automatic cleaning function as standard
5-year warranty for the tightness of the heat exchanger, 2 years for the remaining elements and efficient operation of the boiler.
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.

Reinforced construction. The boiler is adapted as a standard for installation in a closed system provided it is installed in accordance with the boiler's DTR.

Pellet burner with automatic cleaning function as standard.

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 - a pellet burner as standard equipped with two igniters - an option available for all power.

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.

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

Optional equipment - at extra charge:GSM module, WIFI internet module, DK LOGIC 100 regulator, DEFRO SPK Lux room regulator, DEFRO MZ module, SPK Lux wireless controller, RS wireless communication set, platform.


  • 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.

Elements of additional equipment should be reported when ordering the boiler due to the lack of possibility 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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