BUILDMART - 20x4 MUD-IN Air Vent Cover - Drywall Mud-in White Air Vent - Mud Linear Slot Diffuser - Register Grille for Ceiling and Walls - Texas BuildmartOur Standard Linear Slot Diffusers have ASHRAE 70 and ANSI S12. 51 Engineering Certifications Designed and Engineered to the Highest HVAC Industry Standards Commercial Grade Solid Aluminum with Modern Architectural Design This Model can be used in Ceilings and Walls This Model can be used as a Supply Vent Cover and Return Vent Cover CFM: 248 ft3 min Effective Velocity: 9. 8 ft s Neck: 19 3 4" x 3 15 16" Face: 21 5 8" x 5 15 16" This is a Non Filter

Neck: 70 15/16" x 1 5/8" - Face: 72 5/16" x 3 1/8"

CFM: 665 ft3/min - Effective Velocity: 9

3 Slot - Triple Slot - 3/4" Slot Width

12x10 10x12 12 x 10

CFM: 259 ft3/min - Effective Velocity: 9

CFM: 294 ft3/min - Effective Velocity: 9

14 x 10 14x10 10x14 10 x 14

Total Box Dimensions: L: 60 1/2" W: 3" H: 12"

10 x 8 10x8 8x10 8 x 10

20 x 10 20x10 10x20 10 x 20

CFM: 216 ft3/min - Effective Velocity: 9

please make sure the air vent cover is placed in the full open position or remove the directional dampers