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O no! I hope you get better! My chest definitely does not feel right, but I just figured it was the pneumonia. I understand, it totally wiped me out for a month and it is still getting me pretty good. I got scared when I heard what sounded like rice crispys popping in my chest. They did an X ray...

I will message you the full reports, and you can show them that, perhaps it will clear things up a touch.

It is possible if I choose a higher Terminal DeltaP this could have happened.

Cool graph! I have the data you need to determine that for the all the others, but it is all in a PDF Format, which I do want to post on here. Send me your email in a private message.

In this case efficiency did not get significantly better over time and exhibit that behavior. The "Hockey Stick" is demonstrated in the deltaP Curve vs Time. The Medium Test Dust was injected at approximately 2.1-2.2grams every five minutes for each filter. It will all be explained in the video.

Yes, a pre Determined DeltaP determines the end of the test. In our case I choose 8PSID over clean assembly. For the ISO 4548-12 multipass test the average of readings taken every X seconds over a 5 min or 10 min time interval are averaged and reported depending on how long the test takes to...

Your welcome! Thank you! Feeling better, no more fevers. The Covid is no longer contagious my Doc told me, so I can go in public finally. I get headaches everyday, which I never used to get, and a case of pneumonia with a bad cough. My head is cloudy and not firing on all cylinders, but getting...

No, 15um(c) was the lowest I went on this one.

I had run a series of efficiency tests on some of these brands (not the same models) about 11 years ago. I remember being surprised at the results. It was a fun project then and the company I tested for was paid for it, but I have to say it was even more fun this time, doing this for all you...

It is possible that this Wix XP filter is an outlier. We would need to run a sample lot of random filters to know with any kind of statistical certainty.

You are welcome sir, thank you for looking at the summery.

My pleasure! You are correct sir 61.6% @ 20um(c). I hope you watch the video when I am able to make it, when feeling better. I will go into much more detail if you are interested.

I will get a video out with more details, but at the moment I cannot. I hope you all enjoy this summery of your favorite filters! You all have waited long enough and I appreciate you patients!

Here is a summery of the data. You guys have waited long enough, and a video is not possible at the moment.

I am, but I got Covid and a hurting unit at the moment. I am 6 days in. Fever 102.1F. Please bear with me.

Hi Ziggy! From the test I ran, AC Delco Ultraguard Gold was 99.27% @ 30um, 98.85% @ 25um, and 96.49% @ 20um.

Will start the video when I get back from Florida. I will be releasing it without the youtuber.

Will be getting the efficiency/capacity video made, when I get back from Florida. You will see a large differential in micron efficiency from best performing brand to least performing brand.

Yes, no problem I can do that.