20" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w36h36 +How To Measure A Grille RFG3024 Black HP const content item Hi-Lo Oval Stack Head

+How To Measure A Grille Overall Size:

Energy Efficient – Air-tight inner core decreases the pressure loss and provides a more hygienic environment - high energy efficient / No fiberglass erosion into air stream

actual front end outer dimensions are approximately 37

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

High Quality – High-quality rust-free

20" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w36h36 +How To Measure A Grille RFG3024 Black HP const content item Hi Lo Oval Stack Head +How To Measure A Grille Overall Size: Energy Efficient – Air tight inner core decreases the pressure loss and provides a more hygienic environment high energy efficient No fiberglass erosion into air stream