I noticed a problem with my furnace filter. In the vertical slot where it gets installed, there is a channel along the bottom but not along the top. As a result, the top corner of the filter furthest away from the opening will bend toward the blower motor and allow air to rush past the filter. How can I fix that without taking apart the whole intake duct?
Dumb idea #1: Put a series of machine screws along the duct opposite of the filter slot. The filter should push against them when air is flowing and no longer be able to bend. The bad part: Would then be even more of PITA to line up the filter and get it in.