Prima Klima Carbocone K3605-250 is an activated‑carbon exhaust filter built for 250 mm ducting. Its patented conical inner basket evens airflow distribution and improves adsorption efficiency, helping the 23 kg of CTC75 virgin pellet carbon work uniformly. The filter is 105 cm long (without flange), 41.5 cm in body diameter, and handles up to 3000 m³/h of air, making it suitable for large grow rooms, greenhouses, and industrial ventilation. A K3705 dust pre‑filter is included to capture particulates and extend service life, which is specified up to three years depending on conditions. High‑quality metal press parts add rigidity, and the extended flange simplifies a secure connection to 250 mm inline fans.