The 6224N from EBM Papst are an ideal soultion to a wide range of applications, with fibreglass-reinforced plastic and completely integrated electronic commutation. Featuring electronic protection against reverse polarity, the ebm-papst DC fan only operates when the polarity is correct. Additionally, the fans are impedance protected against blocking and over-loading. Supply voltage is 24VDC Air flow is 410m³/h Noise rating is 55dBA Terminal connection is 2 flat plugs 3mm x 0.5mm Operating Temperature -4 ~ 162°F (-20 ~ 72°C) Ball bearing Air exhaust over bars Protected against reverse polarity Electronic commutation completely integrated