No plans. I bought the best rated, largest reusable furnace air filter I could get on Amazon or eBay. It was 2 ft square and cost about $50. I built a plywood box for it to lay on top of and installed an 8 inch duct fan in one side, blowing out. It sits on the floor. Dust settles everywhere in my chick room, all I'm trying to do is concentrate the settling onto that filter. It needs to be sealed better to prevent air bypassing the filter around the edges so I can get more flow through the filter. Or else clean it more often. I think once the filter loads up some, the path of least resistance for the dust laden air is around the filter to the fan. I often have to vacuum the dust out of the inside corners of the box when I take the filter off for cleaning, that's how I know it's getting past the filter.