K1G175-GB63-02 and K1G175-GB41-02 are EC cassette fans with backward curved blades. Product features include: 0-10 VDC / PWM control input, tachometer output, reverse polarity and locked-rotor protection, 7 blades, clockwise rotation, IP22 protection class, B insulation class, any mounting position, no condensate discharge, continuous operation (S1), maintenance-free ball bearings, EN61000-6-3 radio interference emission, EN61000-6-2 radio interference immunity, variable cable exit, EN60950-1 standard certification, UL and CSA certification.