How to make a tornado machine with an open air vortex! You've probably got just enough time to build this before Halloween.

Inline fans are great in use ... We’ve noted down the complete instructions to make a DIY duct muffler below- At this point, you need to make a wire mesh tube which is of the exact diameter ...

At least until now, as [Aris Alder] tackles the problem with an affordable DIY supplied-air respirator ... he sourced a low-cost inline duct fan and placed it outside the work zone to pull ...