8x4 White Premium Aluminum Linear Slot Diffuser – Modern Design (Duct Opening) Big Spring Sale "10x4" means a 10" ×

"10x4" means a 10" × 4" duct opening — the hole in your wall

Need a matching supply register for the same opening

This Green Vent model is built for real replacement projects: remove the old cover

Floor Register Mounting Surfaces Wall

No replacement filters to buy

8x4 White Premium Aluminum Linear Slot Diffuser – Modern Design (Duct Opening) Big Spring Sale "10x4" means a 10" ×CHECK SIZE BEFORE PURCHASE: This 8x4 linear slot diffuser fits a 8" 4" duct opening (the hole in your wall, ceiling, or floor not your old cover face). See the full 8x4 sizing guide Fits a 8" 4" duct opening measure the hole, not your old cover face. Drop in surface mount replacement no drywall, flooring, or duct modification required. Modern minimalist slot design for contemporary interiors and cleaner visual lines. Solid alloy aluminum rust