How to Measure your grille

Once you’ve discovered which style grille you have, you will need the measurements to place an order.

  • Unscrew the “Vent duct grille” screws
  • Pull the vent grille forward and expose the air duct
  • Measure the (Vertical/ or Height) of the duct opening, this will be your first order size number
  • Measure the (Horizontal/ or Width) of the duct opening, this will be your second order size number

Installation instructions

The slideshows below show step-by-step installation instructions for Pre-Vent™ Shield Disposable Filters, Magnaflex™ Filters and Block-Out™ Covers.

Pre-Vent™ Shield Disposable Filters