|Project by treeman||posted 01-07-2009 11:42 PM||11761 views||18 times favorited||15 comments|
I made some comments on a thread re. air filtration and was requested to post some pictures. I couldn’t figure out houw to post these pctures in that thread so I’ll post them as a project. This unit was built for functionality and not for looks but it does a good job in my shop. I never intended to post pictures of it but since they were requested, here they are.
I built my own and it’s very easy to do. I obtained the blower unit from a defunct furnace at my local heating and air repair company. Cost $0 (thy throw them away when they replace a unit.
The box is built from some thin plywood I already had on hand with some framing for support. The sides of the box are framed to take a standard sized furnace filter of your choice. I installed a filter on both sides to double the filtration and reduce the efficiency loss as the unit works. The fan is mounted inside the box with outlet framed and blowing out. As the unit works air comes in the sides through the filters and exits the box through the front.
I hung mine from the ceiling but it could easily be made to mount on a wall or placed on the floor. I use electrostatic filters that claim to be 90% effective down to .3 microns. I use a washable prefilter on the outside to make the electrostatic filter last longer. This unit has worked well for me and the price was right with no out of pocket expense.