The EC derivative of the Katana is available in the same formats and sizes as the AC version - from 600x350mm to 1000x500mm and covers a range of duties up to 3.3 cubic meters per second flow rate and 900 pascals. The units are fitted with high efficiency EC motors which are IP54 rated and suitable for 230V single phase and 400V three phase, 50Hz and 60Hz operation. The speed is infinitely variable via a 0-10V switch signal.