GARYK warned me that I would have to come up with some kind of better filter system for my window A/C unit because of the sawdust. Man was he right! Here’s photos of what I came up with…
Here’s the stock filter.
We use this filter material to make custom filters for switchgear at work… It’s about 15 bucks at Home Depot for a piece 1 inch by 36 inches by 20 feet.
I cut the material to size & I can close the grille with two layers of material behind it.
The primary filter still needed cleaning but it did a good job of filtering out plaster dust while I was sanding drywall.
-- Frank, Florissant, Missouri "The New Show-Me Woodshop"