What if you were able to fit a filter from a gas mask such as the NATO standard 40mm thread width onto the end of the stiff plastic extension of the hose? If you could do that along with the ability to keep the motor cool it just may work. Or if you were to use some other material to use as a "pre-filter" to eliminate "C" you would still have something that just might do it for a day or two. Especially if you had a sealed room to go to in your house, like the Israelis advocate in having, you wouldn't need much more.
