Dayton model 4C330 5 hp centrifugal fan. Blower has an 8" diameter inlet and 4" diameter outlet. Blower has 1832 cfm @ 3" static pressure. The blower fan blade is 13.5" diameter x 4" wide. Motor and fan blade have a 1:1 ratio and turn at 3450 rpm. Requires 208-230/460 vac 3 phase electrical supply. Cost $1,063 new.