I have been an electrican, sixteen years. This tool is now an essential part of my truck tools. I set it up in the garage and run the flexible docked up into the attic where I’m working and it makes a real difference, we still treat attics like confined spaces so we still monitor and limit our time to 15 or 20 minute exposures but the fan makes all the difference. If you’re planning on doing attic work I would highly recommend getting one. We have both the 20 foot hose and the 40 foot hose the 40 foot hose obviously you don’t get as much airflow but even with the airflow coming through it makes a significant difference.We have already ordered three more to put on each truck. I highly encourage you to consider getting one.