ebm-papst R2E190-RA50-21 Centrifugal Fan, 115VAC, 190 x 68.5mm, 341cfm, 70W, 2450rpm, Ball, R2E190 Series Overview ebm-papst RadiCal® Backward Curved Radial Impeller Fans – Defining New Standards in Air Movement Technology: RadiCal is the latest ebm-papst backward curved radial impeller design. The innovative styling of the impeller was perfected using complex simulation modeling, and pr..