Works great so far. Iv completed 2 jobs with it. One Job was Con sawing and kango-hammering a door ope through an 8 inch block wall, I built a timber frame around my work area creating a dust tent attached the duct to one side and created a similar size opening on the other using this method the fan removed all dust in seconds following each cut using the saw, I was using the concrete saw dry as well so a lot of dust.
the Duct can be used on either end as well so the fan is pushing dust out or fan positioned outside pulling dust out from room
Ciaran 
