Clear Plastic Designer Thermostat Cover- Solid and Ring Bases - 7-1/16" W x 4-1/8" H x2 1/8"D sidewall actual front end outer dimensions

actual front end outer dimensions are approximately 34 5/8" width X 34 5/8" height

Actual Filter Size – 29 3/4"w x 33 3/4" x 1"

For example

designed for optimal airflow and efficiency

+ Product Details Size - 20"w X 28"h is the size for the duct opening measurement only

Clear Plastic Designer Thermostat Cover- Solid and Ring Bases - 7-1/16" W x 4-1/8" H x2 1/8"D sidewall actual front end outer dimensions+ Product Details Durable Construction Made with clear, high impact plastic to provide reliable and long lasting protection for your thermostat. Two Mounting Base Options Includes both a solid base and a ring base. The ring base allows installation without removing the thermostat, offering maximum flexibility. Locking Security System Features a built in eight tumbler lock and a supplied key to prevent tampering and maintain consistent temperature