425 Series Step Down 4-Way Swamp Cooler Directional Diffuser With Slide In Damper
452 Series 2-Way Curved Blade Diffuser With Slide-In Damper- Swamp Cooler
450 Series High Velocity Multi-Louver Flush Diffuser - Swamp Cooler
400 SERIES 4-WAY EVAPORATIVE COOLER BOX - SWAMP COOLER
