Envria 1-inch Electronic Air Filter
Sizing Instructions

1. Check your HVAC unit or current filter rack to confirm that you have a 1” disposable /replaceable media filter currently installed. (if not, please call 302-644-8778 for further instructions)
2. Remove the 1” filter and check for dimensions that are printed on labeled on the frame or edges (For example 16x20x1)
3. These dimensions are used to order your new Envria 1-inch Electronic Air Filter
4. If these dimensions are not found on the filter itself, continue with the following...

   a. Place the filter on a flat surface for proper measurement

   b. With a measuring tape or yardstick, measure the width of the filter (longest side to longest side) from left edge to right edge. Write down this number, rounding up to the nearest inch

   c. Next, perform the same measurement for the length of the filter (shortest side to shortest side). Write down this number, rounding up to the nearest inch

   IMPORTANT: Please remember to measure from the outside edges for all sides, to ensure a proper fitting of the Envria 1-inch Electronic Air Filter