Took out my filters to clean and forgot to note how they were installed! They will fit either way, but would like to know the proper way as they are different on each side of the filter. No instructions came with the unit. Anyone know? Would like to save a trip to the dealer!
If they are the simple foam mesh type of screen, I recommend installing them with the extra support rib facing upwards. That way when the air is being sucked in, the rib will provide some support as the foam is sucked upwards. Other than that, the foam is not really directional.