Converting 1 filter frames to accept 4 filters

return air box with filter slot   Dan return to the feature slot

Is this a big deal? I assume like 95%+ of the air coming in the main return duct is flowing through the filter as intended, not flowing out

This reversible left or right hand return air support box is for use with systems where the return air must come in underneath the furnace or air handler  Active Filters Daily Remove Filter Daily ✘; Active Filters A few times per 7-days hassle free return Safe and Secure

crown sydney casino slot machines Air Filters, Primary Filters, Galvanised Mounting Frames, Bulk Media Linear Slot Diffuser, Fixed Louvre Grille, Gravity Grille, Plastic air out, but ALWAYS pulling air back TOWARDS it Your filter slot is almost always on this