Prima Klima’s K1604 is an Industry Line activated carbon filter for extraction setups in indoor grow rooms. It features a 4 cm deep bed of highly activated CTC75 carbon (>1200 m²/g) and is supplied with the K1704 pre-filter. The unit has a 125 mm flange, a 205 mm body diameter, and a 600 mm length (without flange). Manufacturer ratings list a maximum airflow of 700 m³/h, with an optimal operating rate of 460 m³/h for efficient odour removal. Its refillable design and robust metal press parts support long service life and stable performance. Pair with a compatible 125 mm inline fan and ducting to scrub exhaust air effectively in small to medium tents while maintaining low pressure drop.