I’ve been asked several times about the air flow on my modified two-stage Harbor Freight dust collection system with a Thien baffle and Wynn Environmental filter, so I picked up an inexpensive anemometer to see if I can finally give an accurate answer. In this video, I measure several different parts of the system, and show how the meter is set up for each one. If I made any mistakes in the process, let me know in the comments and I’ll make the corrections here in the video description.
CORRECTIONS: At 2:05, I meant one square foot, not one cubic foot. You measure the square footage of the opening to measure how many cubic feet of air is passing through. Of course, I said this right before joking about my math skills, and then proceeded to add a graphic to the video that matched my spoken mistake. I also misspoke the decimal point a couple times, even though it was showing correctly on the meter (zero point seven one, instead of point zero seven one).
Central Machinery 2Hp Dust Collector: https://www.harborfreight.com/2-hp-industrial-5-micron-dust-collector-97869.html
You can buy Wynn filters at https://wynnenv.com/woodworking-filters/. The current (2021) model number for the filter I put in my system is 35C222NANO. They also make a 35B222NANO, which is the same thing but with a removable top cap.
Proster Handheld Anemometer: https://amzn.to/3B07gly
Rockler 4” x 4′ stretch hose: https://amzn.to/38VGuQ5
Skywalker 14′ trampoline (for cardboard): https://amzn.to/3z7I5N5
1:26 Explaining the process
4:15 How to set up the anemometer
6:08 End of hose, dirty filter
6:49 Cleaning the filter
9:29 End of hose, clean filter
11:13 Under the impeller
15:10 Cardboard duct
The old videos showing how I built the system are at this playlist:
This video is not sponsored. I paid for everything and used my own time. As an Amazon Associate, I may earn a small commission if you use the Amazon links to make a purchase.