This is the one I use. Very happy with it and it is on sale for $60 right now. Rockler air respirator. Uses 4 AA batteries. Get two sets of rechargables and you'll always be ready to power up. Positive pressure in mine leaks out near my eyes so my safety glasses never fog up. Get extra filters, just in case. Will not filter fumes. Power Air Respirator | Rockler Woodworking and Hardware
Light weight, no tubing. Self contained. I like it and would buy again.
The more I do, the less I accomplish.