The WEB Plus
Assembly & Installation Instructions:

A. Frame

NOTE: NO TRIMMING OF FILTER PAD OR PLASTIC GRID IS NEEDED IF YOUR FILTER IS 20" X 25". SIMPLY INSERT FASTENERS, THEN PROCEED TO SECTION C, STEP 3.

STEP 1 - Adjust frame to your filter size. You may want to use your old filter as a guide.
NOTE: Outside dimensions of filters are down sized 3/8", (i.e.- 16" x 25" = 15 5/8" x 24 5/8".)

STEP 2 - Install locking tabs on 3 of the 4 frame sides.

B. Filter Pad

STEP 1 - Trim plastic grids and filter pad to fit inside frame. Measure by using tape measure at left. (I.e. If your filter size is 16" x 25" then the outside dimensions of your frame should be approximately 15 5/8"x 24 5/8". Trim filter pad & grids to 15 1/4"x 24 1/4".)

STEP 2 - Using heavy scissors, cut each individual sheet (Top Plastic Grid, Filter Pad, and Bottom Plastic Grid) to size. Hint - Cut one sheet at a time and use the first sheet as a template for the other two sheets.

C. Assembly

STEP 1 - Insert Top Plastic Grid, Filter Pad, and Bottom Plastic Grid back into frame.
NOTE: Squeeze Plastic Grid and Filter Pad together and insert into frame one side at a time
.
STEP 2 - Enclose 4th side and insert remaining locking tab.

STEP 3 - Now simply replace your old furnace filter.

NOTE: Both sides of filter are the same. The airflow label is provided for your consistency in using the filter.