14" X 14" Plastic Access Panel Removeable/Reversable Door With Frame For Concealed Wall / Ceiling Application - [Outer Dimensions: 16" Width X 16" Height] Aluminum Bar Actual Filter Size – 11

Actual Filter Size – 11 3/4"w x 21 3/4" x 1"

actual front end outer dimensions are 35

+ Product Details Perfect Fit & Easy Sizing - Designed for a 36" x 20" OR 20" x 36" duct opening (measured at the opening)

+ Product Details Size – 12"w X 28"h is the size for the duct opening measurement only

14" X 14" Plastic Access Panel Removeable/Reversable Door With Frame For Concealed Wall / Ceiling Application - [Outer Dimensions: 16" Width X 16" Height] Aluminum Bar Actual Filter Size – 11+ Product Details 14"w X 14"h is the size for the drywall opening measurement only, actual front end outer dimensions are approximately 2" wider. Most common access door Plastic Frame Easy Installation Just apply caulking or glue to the back of the frame Put in frame and lock the door into place Includes slots for a screwdriver or other prying devices Hinges on the top and bottom The door can be easily removed with a slight squeeze Installation