I just bought two 2.0 microns dust collector bags for my dust collector. Do I have to use both of them for the best results or can I just use the 2.0 on the top of the collector and the regular one for the wood particles on the bottom? - Tom Clark

Chris Marshall: Since you've already bought two bags rated for 2.0 microns, I would use them both. Until the bottom bag is completely full, it will still offer a greater level of dust filtration than a bag rated for larger particles—especially right after you empty the bag. Anything you can do to trap fine wood particles inside your collector and not in your lungs is the best approach to take, in my opinion. However, do check the manual that came with your collector for further details regarding bag recommendations. Or, try contacting the manufacturer directly; there may be a FAQ section right on the company's website that addresses dust collection specifications.