Boiler DEFRO FIREWOOD DUO 12 kW
SKU: F170G
EAN: 2010000030127
Product details
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Defro FIREWOOD DUO Dual-Fuel Boilers
The Defro FIREWOOD DUO series boilers are versatile and modern heating devices that combine the convenience of automatic pellet burning with the option for manual loading of firewood. Designed for high efficiency and environmental friendliness, they meet the Ecodesign directive requirements when operating on pellets, achieving an energy class rating of A+. The FIREWOOD DUO series offers flexible and reliable heating solutions for diverse needs.
Key Features of the Defro FIREWOOD DUO Boilers:
- Two operating modes (DUO): The option for automatic pellet burning for maximum convenience and efficiency, along with a manual firewood loading option as an alternative or additional heat source.
- High energy efficiency (A+): In automatic pellet burning mode, the boilers achieve high efficiency (up to about 86%) and seasonal energy performance for room heating at levels of 82-83%.
- Ecodesign Compliance: While operating on pellets, the devices meet strict pollution emission standards (PM, VOC, CO, NOx) according to Commission Regulation (EU) 2015/1189.
- Wide power range: The series is available in nominal thermal power variants of 12, 15, 19, and 24 kW, allowing the boiler to be matched to the heating demands of various buildings.
- Low energy consumption and quiet operation: The optimized design ensures minimal electricity consumption for the boiler’s own needs and low noise levels.
- Recommended collaboration with a buffer tank: To ensure the most stable and efficient operation, especially in automatic mode, it is recommended to operate the boiler in conjunction with a suitably sized heat buffer storage tank.
Who is this a good choice for?
The Defro FIREWOOD DUO boilers are an ideal solution for users seeking a flexible heating system that combines the convenience of automatic pellet heating with the ability to use firewood. They are an excellent choice for homeowners who value both comfort and fuel independence while maintaining high environmental and efficiency standards during pellet operation.
Technical Specifications – DEFRO FIREWOOD DUO Boilers (12-24 kW)
| Parameter | FIREWOOD DUO 12 | FIREWOOD DUO 15 | FIREWOOD DUO 19 | FIREWOOD DUO 24 |
|---|---|---|---|---|
| Device Parameters | ||||
| Model Identifier | FIREWOOD DUO 12 | FIREWOOD DUO 15 | FIREWOOD DUO 19 | FIREWOOD DUO 24 |
| Fuel Feeding Method | Automatic fuel feeding: requires boiler operation with a domestic hot water tank of 240 l capacity | Automatic fuel feeding: recommended operation with a domestic hot water tank with a minimum capacity of 300 l | Automatic fuel feeding: recommended operation with a domestic hot water tank with a minimum capacity of 380 l | Automatic fuel feeding: recommended operation with a domestic hot water tank with a minimum capacity of 480 l |
| Condensing Boiler | No | No | No | No |
| Solid Fuel Cogeneration Boiler | No | No | No | No |
| Multifunctional Boiler | No | No | No | No |
| Parameters According to Regulation 2015/1187 | ||||
| Energy Efficiency Class | A+ | A+ | A+ | A+ |
| Nominal Heat Output (kW) | 12 | 15 | 19 | 24 |
| Energy Efficiency Index (EEI) | 121 | 121 | 121 | 121 |
| Seasonal Energy Efficiency for Space Heating (ηs) (%) | 83 | 82 | 82 | 82 |
| Fuel and Emissions Related to Seasonal Space Heating | ||||
| Fuel | (recommended / other suitable) | |||
| Logs, moisture ≤ 25 % | No / No | No / No | No / No | No / No |
| Wood Chips, moisture 15-35 % | No / No | No / No | No / No | No / No |
| Wood Chips, moisture > 35 % | No / No | No / No | No / No | No / No |
| Wood Pellet or Briquette Fuel | Yes / No | Yes / No | Yes / No | Yes / No |
| Sawdust, moisture ≤ 50 % | No / No | No / No | No / No | No / No |
| Other Wood Biomass | No / No | No / No | No / No | No / No |
| Non-Wood Biomass | No / No | No / No | No / No | No / No |
| Hard Coal | No / No | No / No | No / No | No / No |
| Lignite (including briquettes) | No / No | No / No | No / No | No / No |
| Coke | No / No | No / No | No / No | No / No |
| Anthracite | No / No | No / No | No / No | No / No |
| Mixed Fuel Briquettes | No / No | No / No | No / No | No / No |
| Other Fossil Fuel | No / No | No / No | No / No | No / No |
| Briquettes from a Blend (30-70 %) of Biomass and Fossil Fuel | No / No | No / No | No / No | No / No |
| Other Biomass and Fossil Fuel Blend | No / No | No / No | No / No | No / No |
| PM Emission (mg/m³) – Recommended Fuel | 17 | 17 | 16 | 17 |
| OGC Emission (mg/m³) – Recommended Fuel | 14 | 13 | 16 | 13 |
| CO Emission (mg/m³) – Recommended Fuel | 282 | 268 | 286 | 282 |
| NOₓ Emission (mg/m³) – Recommended Fuel | 119 | 120 | 114 | 111 |
| Properties When Operating Using Only Recommended Fuel | ||||
| Produced Usable Heat | ||||
| at nominal heat output (Pn) (kW) | 12.2 | 15.2 | 19.3 | 24.2 |
| at 30 % nominal heat output (Pp) (kW) | 3.5 | 4.2 | 5.3 | 7.1 |
| Operational Efficiency | ||||
| at nominal heat output (ηn) (%) | 85.4 | 85.5 | 85.8 | 85.5 |
| at 30 % nominal heat output (ηp) (%) | 86.6 | 86.6 | 86.0 | 86.2 |
| For Solid Fuel Cogeneration Boilers: Electrical Efficiency | ||||
| at nominal heat output (ηel,n) (%) | n/a | n/a | n/a | n/a |
| Electricity Consumption for Own Needs | ||||
| at nominal heat output (elmax) (kW) | 0.029 | 0.037 | 0.040 | 0.055 |
| at 30 % nominal heat output (elmin) (kW) | 0.012 | 0.018 | 0.020 | 0.032 |
| Secondary devices for emission reduction, where applicable | n/a | n/a | n/a | n/a |
| in standby mode (PSB) (kW) | 0.003 | 0.003 | 0.003 | 0.003 |
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