Thanks guys. The top is a solid surface that is very similar to cutting board material. The filters are not washable, they are 16" X 20". I'm not sure what size the motor is, it's pretty tough to read the motor label when it's inside the squirel cage, but it is a four speed motor. I added a speed switch awhile ago, but haven't finished the markings for it on the switch plate. The timer switch is made by Intermatic. I use this unit in the basement shop that has a fairly low ceiling. I am aware of the washable filters, I have one on a box fan that I fabricated some channel for the washable filter to slide into. Sometimes I will put the box fan close to where I'm working in order to capture the fine dust as fast as I can, so the dust doesn't have as much time to spread. Some people argue that Air filtration units / fans do just that, spread the dust around. There may be some truth to that, but I think that you will find that no matter how good of a setup that you have, there is always going to be dust. The sooner you grab it the better. I can tell you that from my experience that with dust collection and air filtration I can take my dust respirator off sooner, and I have a cleaner shop. I will continue to do what I'm doing.
Last edited by Woodchuck1957; 09-27-2014 at 10:52 AM.