25" x 20" Aluminum Return Grille - Easy Airflow - Linear Bar Grilles w30h30 Check Valve Installation: Verify that

Check Valve Installation: Verify that the check valve is correctly installed and the pump-mute wedge is integrated with the valve

+ Product Details Size - The listed 8" diameter refers specifically to the size of the duct opening

+ Product Details Size - 18"w X 34"h X 2"d (for duct opening measurement only)

just unscrew

[Outer Dimensions: 22

25" x 20" Aluminum Return Grille - Easy Airflow - Linear Bar Grilles w30h30 Check Valve Installation: Verify that25" X 20"opening dimension (vent opening) actual total grille size is approx. 1. 5" wider SEE BELOW HOW TO MEASURE A GRILLE Sidewall and or Ceiling Grille HIGH QUALITY High Quality Solid Stamped Steel with Counter Sunk Screw Holes (SCREWS INCLUDED) and No Sharp Edges Powder Coat Finish Smooth, Shiny, Scratch Resistant, Beautiful. Looks Like It Was Just Waxed UNRESTRICTED AIRFLOW For Your HVAC System Noise Free Components No Vibrating Louvers Etc.