High efficiency backwardly curved single thickness wheel has a blade shape similar to the convex shape of the BCA airfoil wheel. This shape provides nearly identical performance characteristics at a given speed at a slightly lower efficiency. Designed for moist or lightly contaminated air systems,and exhibiting non-overloading horsepower characteristics and stable performance over the entire pressure curve. Noise levels are the lowest in the peak efficiency range of the performance curve. Class 3 wheels utilize a circumferential blade stiffener for higher tip speed capability. AMCA certified for sound and performance. 18 fan sizes from 12-1/4" through 66" diameter wheels, in Class I, II, III construction.
More Info - See AS 0953 Backwardly Inclined Blower Bulletin