Installation Location – Sidewall or ceiling
and the second number represents the height
and with a built-in back 1/2" mesh they also protect you from annoying rodents like mice
optimizing performance and energy efficiency
Actual Filter Size – 27 3/4"w x 25 3/4" x 1"
12"w X 12"h Extruded Aluminum Adjustable Core Mount Supply Ceiling HVAC Air Grille Interchangeable: 1-Way, 2-Way, 3-Way or 4-Way - Vent Duct Cover [Outer Dimensions: 13.125" X 13.125"] ceiling Installation Location – Sidewall or+ Product Details Size 12"w X 12"h Is The Size For The Duct Opening Only, Dimensions With Outer End are 13. 125" X 13. 125". Design Re configurable Interchangeable Sections Easily convertible into 1 Way, 2 Way, 3 Way, or 4 Way Just lift sections and rotate to re configure direction. High Quality Aluminum The premium durable aluminum will never rust and it will never wear through leaving the material with an elegant, beautiful, and smooth surface, adds
