For smoke testing these matches are far better than incence. It's a small investment in a better way to check things out.
http://inspectusa.com/second-smoke-e...ar-p-1631.html
I use a powered duct to bring make up air in through my bench top. It helps keep condtioned air in the room during weather extremes. I still have some flow over my shoulders but most of the torch plume goes up the hood carried by the air coming in under the table.
Robert