How to do a DIY mask fit test
Channel: pneustrom
Date: 2021-07-27

0:00 Intro
1:48 Items needed
6:35 Qualitative fit test - what is it?
8:58 "Better than nothing" method & hood method
10:25 How to make saccharine solution
11:15 Disclaimer: test is for fit / seal, not 100%
12:52 "Better than nothing" - demo without mask
14:47 "Better than nothing" - KN95 tested
17:58 "Better than nothing" - surgical mask tested
20:34 "Better than nothing" - Fix The Mask tested
24:05 Hood method - how to build the hood
24:31 Hood method - my garbage bag hood
26:19 Hood method - how to perform test, as per US Army instructions
33:23 Hood method - testing imperfect KF94
37:03 Hood method - testing 3M N95

NOTE: I've learned a lot since making this video in 2021.  I've since put together an all-in-one home mask fit testing kit which you can find here:

https://fittests4all.bigcartel.com/product/home-fit-test-1.

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US Army Public Health Center's guide to DIY mask fit-testing: 

https://phc.amedd.army.mil/PHC%20Resource%20Library/cv19-do-it-yourself-respiratory-fit-testing.pdf

All the masks on amazon tested, as of 2021-3:
https://www.armbrustusa.com/pages/mask-testing

*Nebulizer* -

Specific model I use looks like it's no longer available on Amazon. Ones like this should work https://www.amazon.com/Portable-Nebulizer-Handheld-Nebuliser-Atomizer/dp/B08DGX8ZDH/ref=sr_1_9?dchild=1&keywords=nebulizer&qid=1627424532&sr=8-9 but I haven't personally tested this model so I cannot completely vouch for it. Any portable nebulizer should work - see the US Army instructions as well here.

*Bitter solution / bitrex* -

This is the solution I use, sold by Amazon and produced by 3M. https://www.amazon.com/Qualitative-Respirator-Fit-Test-Apparatus-Solution/dp/B000TBN93K Others are also available that may be less expensive.

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Major hat-tip to YouTuber Viral Helmets and https://www.youtube.com/watch?v=zaaYuz7tYU0 for the idea of the Sweet N' Low fit test!