Good idea -- that would work for my larger Levoit unit, which takes a pair of flat rectangular filters, though not for the smaller cylindrical unit.
For now, I'm going to try to keep buying the Levoit filters, since I think they have more "layers" than the furnace filters, and I don't have a good sense of what all I should to be filtering in this location. But it's good to have a backup plan.
For now, I'm going to try to keep buying the Levoit filters, since I think they have more "layers" than the furnace filters, and I don't have a good sense of what all I should to be filtering in this location. But it's good to have a backup plan.