Aluminum Fixed Bar Return Air Filter Grille with Plenum Box - 24 x 24 T-Bar Lay-in Drop Ceiling Height_18in + Product Details Size -

+ Product Details Size - 48"w X 24"h is the size for the duct opening measurement only

Experience enhanced indoor comfort with our 6" Butterfly Damper

ceiling or ceiling tiles – provides safety with the included safety wire to prevent the door from falling off

+ Product Details Size – 14"w X 24"h pleated MERV 8 filter for HVAC return filter grille - 3 Pack

Aluminum Fixed Bar Return Air Filter Grille with Plenum Box - 24 x 24 T-Bar Lay-in Drop Ceiling Height_18in + Product Details Size -Pre scored Outlines per Diameters from 6" 18" Outer Dimensions 23. 75" x 23. 75" Plenum Box Depth 5. 25" Plenum Size 20x20 Filter Size to be used: 20x20x1 For Lay In T Bar Ceiling High Quality Aluminum Construction 2 3" bar spacing Horizontal bars are fixed at 45 degrees for Great Airflow Dynamics Concealed Hinges and Latches to achieve a clean and modern look R6 Fiberglass Back Plenum accepts 6" to 18" Round Spin in Collars or Start Collars (not