The ROJEK PK BIO 20 is a modern wood gasification boiler with a nominal output of 20 kW for the efficient heating of single-family homes and small commercial units. It is designed for logs up to 530 mm in diameter and meets the requirements of EN 303-5 Class 5 as well as Ecodesign.
Highlights/Advantages
⭐ 20 kW nominal output – ideal for single-family homes with moderate heating requirements
⭐ Large combustion chamber (130 liters) – long burn time of 5–9 hours
⭐ Upper filling chamber – convenient and quick loading
⭐ EN 303-5 Class 5 & Ecodesign compliant – eligible for funding and future-proof
⭐ Electronic control – precise and efficient combustion control
Area of application & Target audience
The ROJEK PK BIO 20 is suitable for single-family homes, workshops, and smaller residential buildings with a heat demand of up to approximately 20 kW. It is designed for use in central heating systems and works optimally in combination with a buffer storage tank.
Everyday benefits
The top-loading design makes filling the boiler particularly convenient. The generous combustion chamber volume allows for long burn times, thus reducing refueling intervals. The heat exchanger is easily cleaned via an external operating lever.
Technology & equipment
The boiler operates on the proven wood gasification principle with electronic control. Approved according to EN 303-5 Class 5 and compliant with EU Regulation 2015/1189 (Ecodesign).
Maximum log length: 530 mm
Maximum wood moisture content: 20%
Calorific value of fuel: 14–18 MJ/kg
Efficiency & Environment
Rated power: 20 kW
Efficiency at rated power: 83.1%
Seasonal space heating energy efficiency: 79%
The boiler meets the strict emission requirements of class 5 according to EN 303-5.
Technical data
| feature | Value |
| Manufacturer | ROJEK |
| Model | PK BIO 20 |
| Boiler type | wood gasification boiler |
| Rated power | 20 kW |
| fuel | firewood |
| Max. log length | 530 mm |
| Filling chamber volume | 130 l |
| efficiency | 83.1% |
| Seasonal efficiency | 79% |
| standard | EN 303-5 Class 5 |
| Ecodesign | Yes |
Scope of delivery
FAQ
What is the permissible length of wood?
Up to 530 mm.
Is the boiler eligible for funding?
It meets EN 303-5 Class 5 and Ecodesign standards; national funding conditions are decisive.
Is a buffer storage tank required?
Recommended for efficient and standards-compliant operation.
How long does a filling burn?
Approximately 5–9 hours, depending on fuel quality.
What wood moisture content is permissible?
Maximum 20%.
How is the cleaning done?
Via external cleaning lever and cleaning door.
Conclusion
The ROJEK PK BIO 20 offers efficient wood gasification technology for smaller buildings and impresses with high efficiency and emission values that comply with standards.
