The hopper extension can be purchased for Biopel boilers, which are equipped with an 80x80 hopper for 220 kg of pellets. After installation, the hopper capacity will be extended to 350 kg of pellets.
On the other hand, you need to consider that the extension will take up more space. Therefore, choose this option only if there is enough space in the boiler room. For the floor plan dimensions of the hoppers, go to the link "technical parameters".