I installed a heat exchanger in my home. The new unit was some short, so, I built a wood frame for it to sit on and that allowed me to couple it to the duct work where the A-coil sits. Dumb azz me did not allow for the size of filter it takes so, I have to bend the filter and the it will lay flat on the surface and weighting it down with bricks on all four corners. I'm getting a lot of everything in the house on the A-coil. Is there a better way for this not to happen? I wonder if the trash is getting through from around the perimeter of the filter. I put sticky foam rubber between the wood frame I made and the heat exchanger.I have to clean the A-coil every year.

Trying to save a buck is costing me my labor....