I'm a full time residential remodeler. We used to put a box fan in a window at customers houses until I found this draw fan. It will unroll toilet paper off the wall. I got the vent hose with it, which I recommend, and now can place the fan on the floor near the work, run the hose at least fifteen feet away to a window and remove practically all airborne dust, chemical odors or smoke from large rooms or sites without delay. Tearing down a 25' x 75' plaster-on lath basement ceiling, the dust was so bad in 10 minutes you couldn't see a light bulb across the room. Within 7 minutes....or less.... with this fan working, you couldn't tell we had even started yet. We did have to make a Lauan window frame "collar" to support the hose in a double hung but besides that, this monster starts working right out of the box. You can do no better service for your residential customers or your personal health than with this powerful bugger. It's truly quite loud, which leads us to shutting it down now and then (like a small airplane-can't hear the radio) but when it comes to you or your people breathing in god knows what unknown chems and dust... this machine makes me a better contractor