20" X 20" Steel Flush Access Panel Door for Wall/Ceiling Application with Slotted Lock, Mud-in Flange - [Outer Dimensions: 21" Width X 21" Height] w32h32 Actual Filter Size – 23

Actual Filter Size – 23 3/4"w x 31 3/4" x 1"

Its locking eight-tumbler mechanism and supplied key safeguard your thermostat from tampering

Simplified Installation: Our Radial Damper ensures easy setup

You’ll no longer have to worry about maintaining your line set

+ Product Details Size - 12"w X 16"h X 2"d (for duct opening measurement only)

20" X 20" Steel Flush Access Panel Door for Wall/Ceiling Application with Slotted Lock, Mud-in Flange - [Outer Dimensions: 21" Width X 21" Height] w32h32 Actual Filter Size – 23+ Product Details Size 20" X 20" is the size for the drywall opening measurement only, actual front end outer dimensions are 21" Width X 21" Height High Quality High grade steel construction. Flush Access Door Is a type of door or panel designed to provide access to concealed spaces, such as HVAC systems, electrical components, plumbing pipes, or other utility areas. Unlike traditional doors that have visible frames and hinges, a flush access door is