BUILDMART - 22x8 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: 319 ft3 min Effective Velocity: 9. 8 ft s Neck: 21 9 16" x 7 13 16" Face: 23 11 16" x 9 13 16" This is a Non Filter

ASIN: B09WR8F57Y

ASIN: B08MZGBTRV

ASIN: B081QWLB5M

ASIN: B09WV1RCWP

CFM: 625 ft3/min - Effective Velocity 9

51 and ASHRAE 70 Engineering Certifications

Neck: 29 1/2" x 19 1/2" - Face: 31 1/2" x 21 1/2"

CFM: 328 ft3/min - Effective Velocity: 9

ASIN: B09GJCN2FH

CFM: 216 ft3/min - Effective Velocity: 9

Neck: 17 3/4" x 1 5/8" - Face: 19 1/8" x 3 1/16"

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