12x6 White Premium Aluminum Linear Slot Diffuser – Modern Design (Duct Opening) ALSD What size do I order

What size do I order — 4x10 or face size

The built-in damper lever sits fully flush between the aluminum slats at every position

which helps balance heating and cooling across your home

A return grille is fixed open and draws room air back to your HVAC system

See the 10x4 vent cover collection for other Green Vent options in this opening size

12x6 White Premium Aluminum Linear Slot Diffuser – Modern Design (Duct Opening) ALSD What size do I orderCHECK SIZE BEFORE PURCHASE: This 12x6 linear slot diffuser fits a 12" 6" duct opening (the hole in your wall, ceiling, or floor not your old cover face). See the full 12x6 sizing guide Fits a 12" 6" 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