Post by kraftt on Mar 30, 2018 1:41:33 GMT -5
Mentioned in another thread about picking up a job site air scrubber. But I really don’t need hepa. Just want to keep excess fine dust under control and from migrating. I had two Panasonic inline blower fans sitting in the shop and I wondered about their use. They were both 440 cfm, very quiet, but I couldn’t experiment much with them as they had to be installed the next day.
I’ve since picked up a smaller single 340cfm to test with. The 440’s aren’t any more than 50mm larger, in only one dimension, and typically cost about $40 more but I got the 340 at a great price, $129 (vs $160), so for experimentation it’s fine. Both weigh around 25 lbs.
You can see in the link photo that with the side panel removed you already have one filter inlet cut out. The squirrel cage fan is divided and air enters on the other side as well. So I’ll cut a similar square opening on the other side too.
Then I’ll remove the original inlet port and it’s entire metal end panel also. That will make for three 12” x 12” inlet filter panels for low restriction, but I’ll sneak up on it and try only two filters first and cap off the inlet. If the restriction isn’t bad I’ll leave the inlet port for times when I want to run duct to draw air from a confined space and place the blower outside etc.
Probably going to use aluminum channel notched and bent into a square U with some foam tape on one side to seal filters. Pop on some wheels, cut in a top switch, and attach a handle.
Rather then port the exhaust through a portable duct to the outside, I will just let it blow into a .5 micron WunderBag cut & synched around outlet port. These bags are huge and the air pressure 'should' inflate them for low restriction. Since filters and bags are consumables so I won’t count them in the cost, but I figure all in, all parts including fan, around $190. (for the 340cfm)
imgur.com/a/dRvah
I’ve since picked up a smaller single 340cfm to test with. The 440’s aren’t any more than 50mm larger, in only one dimension, and typically cost about $40 more but I got the 340 at a great price, $129 (vs $160), so for experimentation it’s fine. Both weigh around 25 lbs.
You can see in the link photo that with the side panel removed you already have one filter inlet cut out. The squirrel cage fan is divided and air enters on the other side as well. So I’ll cut a similar square opening on the other side too.
Then I’ll remove the original inlet port and it’s entire metal end panel also. That will make for three 12” x 12” inlet filter panels for low restriction, but I’ll sneak up on it and try only two filters first and cap off the inlet. If the restriction isn’t bad I’ll leave the inlet port for times when I want to run duct to draw air from a confined space and place the blower outside etc.
Probably going to use aluminum channel notched and bent into a square U with some foam tape on one side to seal filters. Pop on some wheels, cut in a top switch, and attach a handle.
Rather then port the exhaust through a portable duct to the outside, I will just let it blow into a .5 micron WunderBag cut & synched around outlet port. These bags are huge and the air pressure 'should' inflate them for low restriction. Since filters and bags are consumables so I won’t count them in the cost, but I figure all in, all parts including fan, around $190. (for the 340cfm)
imgur.com/a/dRvah