This kit matches the GT125 single-speed fan to a Prima Klima K2601 flat carbon filter. It is sized for a grow space running up to 600 watts of HPS lighting. The fan delivers 420m3 per hour through a 125mm flange, driven by a quiet EBM Papst motor with low noise.
The flat K2601 filter handles an ideal 360m3 per hour, up to 480m3 per hour, and stands 400mm tall on a 125mm flange. Connect the two with a collar and duct, fan on extraction, filter inside the tent. Add a separate controller later if you want variable speed. The mounting bracket is included.