The PolyStorm fan series combines premium components with our roto-molded High-Density Polyethylene (HDPE) housing. Corrosion resistance features include fiberglass props, PVC shutters, and stainless steel mountings. At the core of every PolyStorm fan are rugged GrowerSELECT® dual voltage motors with an industry-leading, 2-year warranty. PolyStorm fans are an excellent choice for new ventilation systems or lower-cost replacement fans for remodeling and retro-fit applications.