Model Part No. Bearing System Rated Voltage Freg Current Input Power Speed Air Flow Static Pressure Noise Level Weight MF12038A1H-4A 12038A1HSAT (L)12038A1HBAT (L) Sleeve, Ball 110 / 120 V 50 / 60 Hz 0.24 / 0.27 A 19 / 23 W 2,700 / 3,100 RPM 48 / 100 CFM 0.28 / 0.34 Inch-H2O 45 / 51 dB-A 450g MF12038A2H-4A 12038A2HSAT (L)12038A2HBAT (L) Sleeve, Ball 220 / 240 V 50 / 60 Hz 0.12 / 0.14 A 20 / 24 W 2,700 / 3,100 RPM 48 / 100 CFM 0.28 / 0.34 Inch-H2O 45 / 51 dB-A 450g MF12038A1H-4A 12038A1HSAT (L)12038A1HBAT (L) Sleeve, Ball 110 / 120 V 50 / 60 Hz 0.16 / 0.18 A 14 / 17 W 2,300 / 2,500 RPM 80 / 90 CFM 0.18 / 0.24 Inch-H2O 39 / 43 dB-A 450g MF12038A2H-4A 12038A2HSAT (L)12038A2HBAT (L) Sleeve, Ball 220 / 240 V 50 / 60 Hz 0.08 / 0.09 A 14 / 17 W 2,300 / 2,500 RPM 80 / 90 CFM 0.18 / 0.24 Inch-H2O 39 / 43 dB-A 450g