) 20" Barnstormer Fan provides air movement in barns, dairy facilities, and other buildings. Helps circulate air year round and moves hot air back to floor level during the winter. Exclusive easy-open hinged front guard significantly cuts cleaning and maintenance time to maintain efficiency. Includes hot dip galvanized mounting bracket. Optional variable speed control (sold separately) to adjust fan speed, if desired. Fan is NOT pre-wired with electrical cord, to allow for custom installation on site.