PBPL Plug Fans offer versatile applications for oven manufacture, air handling units, ceiling, wall and floor panel plenums. PBPL Plug Fan allow space saving by utilizing the wheel compartment as a pressurized chamber in lieu of a fan housing. PBPL Plug Fan’s insulated plug is ideal for high temperature applications. PBPL Plug Fan wall thickness can be as great as 8″. PBPL Plug Fan Wheel Diameters: 12.25″ to 44.5″ PBPL Plug Fan Volumes: 500 to 52,000 CFM.