Combining the technology of the most efficient fans designed for agriculture and the corrosion resistance of plastics, the DDPG and DDPS perform in the toughest environments.    FEATURES Housing - Heavy gauge plastic and fiberglass provides • strength and corrosion resistance while being easy to clean and mount. 14” thru 24” fans have plastic housing and diffuser. 36” thru 50” fans have fiberglass housing and plastic diffuser. The slant design on DDPG and DDPS corrosion. models improves performance and assists run-off condensation. Propeller - Direct drive DDPS fan sizes 14” thru 36” feature stainless steel cambered twist blades riveted through the center eliminating stress. Belt drive DDPS 36” fans are available with either stainless steel or galvanized propellers. Motor - High efficiency motors are totally enclosed with shielded ball bearings for protection from the environment. Frame - Stainless steel provides a strong verticalsupport that aligns the propeller centered in the orifice for maximum performance. Front Guard - Heavy gauge and coated to prevent rust. Shutter - Unique design lowers resistance with preventing back drafts. Available in aluminum or plastic. Air Diffuser - Originally designed and introduced by Acme in 1979 in the Master-Ex line. Published performance for DDP and DDPS includes diffuser for accurate data - not estimated percentages. Variable Speed - All direct drive fans except 36’ Model DDPS36IG8-C are suitable for variable speed with the proper controller. Every Acme Fan is backed by a full 2-year comprehensive U product warranty. In addition to Acme’s standard 2-year comprehensive assembly in every Acme Fan.warranty, Acme offers a 5-year warranty on the shaft and Acme’s corrosion resistant Master-Ex@ DDP fans offer an additional lifetime warranty on the propeller, cone and housing.