10" x 10" [Duct Opening] Ceiling Supply Diffuser Vent Cover – 3-Way Airflow with Full Aluminum Frame, Back Blades & Opposing Blade Lever Damper [Outer Size: 13" x 13"] Height_14in Installation – Easy installation -

Installation – Easy installation - just screw the sides of the access panel frame into your duct/hole – see photos for example

actual front end outer dimensions are approximately 26 5/8" width X 14 5/8" height

or commercial environment

attic fans

+ Product Details Size & Compatibility – The size of the side round ceiling box is 8" X 8" X 7" and it is compatible with duct 7"

10" x 10" [Duct Opening] Ceiling Supply Diffuser Vent Cover – 3-Way Airflow with Full Aluminum Frame, Back Blades & Opposing Blade Lever Damper [Outer Size: 13" x 13"] Height_14in Installation – Easy installation -+ Product Details Size Refers to duct opening only. The face frame extends roughly 1. 5" on each side. Do not measure the overall grille for sizing. Design All aluminum frame and back blades. Rustproof and built to last in moisture prone environments. Quiet Airflow Opposing blade damper design reduces vibration and noise for smoother air distribution. Clean Finish White powder coated surface resists chips, scratches, and discoloration over time. Easy