Central Air Duct Plenum Grid Cover

This grid can be resized in your splicer to fit your Plenum return which is usually in your basement. The plenum is the metal duct that all of your air circulation lines run into for air flow in a central air conditioner system or filtration. The opening needs to be open to allow air flow but if you get mice in the basement there is a chance they can infiltrate the lines so this grid is made wide enough for air flow and small enough to keep mice out. The opening in the picture is 8X18 (standard) but my two printers cant print that big so I did two 8X9 pieces and glued together. Resize to your needs.