Model Bearing System Rated Voltage (V) Voltage Range (V) Input Power (W) Air Flow (CFM) Static Pressure (mm-H2O) Speed (RPM) Noise Level (dB-A) Weight (g) TTD12038HBB2PL B2/S 12 7--18 5-36 120-155 5.5-8.5 2800-4100 38-50 310 TTD12038HCB2PL B2/S 24 7--30 5-36 120-155 5.5-8.5 2800-4100 38-50 310 TTD12038HDB2PL B2/S 48 11-72 5-36 120-155 5.5-8.5 2800-4100 38-50 310 TTD12038HEB2PL B2/S 110 50--150 5-36 120-155 5.5-8.5 2800-4100 38-50 310 TTD12038HFB2PL B2/S 220 110--240 5-36 120-155 5.5-8.5 2800-4100 38-50 310 TTD12038HGB2PL B2/S 380 220-380 5-36 120-155 5.5-8.5 2800-4100 38-50 310