Interesting air filter tests

famous bob said
I knew someone would bad mouth him, I enjoy his videos , and agree w/ a lot of his stuff, some of it is quite surprising .
Some of his oil tests are quite surprising and a pretty good assesment of the oils.
I `d like to see him do a 12 volt elec fan test , I think a lot of their flow ratings are b.s. , '' not that I depend on one"
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I love his videos bob me and my boy always watch them together. My oldest son is at that age where we bond thru tv and video games. He is huge into YouTube and wants to start his on YouTube channel making video game reviews. I'm gonna buy him the equipment to start recording for his birthday. He will be 14 next month.