Perfect Fit - High Airflow - Custom 3D Printed Respirator Face Mask - Replaceable filters

Your safety is no joke! Read all this information!

WARNING! The activated carbon layer of the MERV 16 filter used in this video appears to contain fiberglass! Other home air filters may also contain Fiberglass! Do not use fiberglass based materials for breathing devices! It can be very difficult to determine what these filters are made of and some may be a small percentage fiberglass. Use extreme caution when making any type of breathing device! Emailing the manufacturer may be the only way to find out what the filter is made out of.

There are lots of materials that can be loaded into this and other 3D printed mask designs. According to "tests at Missouri University and University of Virginia, scientists found that vacuum bags removed between 60 percent and 87 percent of particles." This article also mentions "A 600 thread count pillow case captured just 22 percent of particles when doubled, but four layers captured nearly 60 percent." This may indicate that a double layer of a MERV 12 filter (or lesser rated filters) may have much better filtration performance than just a single layer. ALSO "The problem with air filters is that they potentially could shed small fibers that would be risky to inhale. So if you want to use a filter, you need to sandwich the filter between two layers of cotton fabric." Good advice! https://www.nytimes.com/2020/04/05/well/live/coronavirus-homemade-mask-material-DIY-face-mask-ppe.html

It appears many 3D printed masks do not have enough filter surface area and negate the manufacturer filtration ratings and can actually lead to CO2 build up in the mask cavity and in your body. This particular design appears to have enough surface area to function without these issues. However, keep this in mind and if you choose to wear a device like this REMOVE IT if you feel light headed, dizzy, headache, confusion, etc. (Carbon Dioxide Poisoning) and NEVER wear a mask while sleeping.

---------------------Filter capacity calculation-------------------

Resting breathing volume: 0.3CFM (.5m3/h source engineeringtoolbox.com, howstuffworks.com)
Exercise breathing: 0.9CFM (1.5m3/h source engineeringtoolbox.com)

MERV 12 Filter - Rated for 1708CFM
Square inches of filter area: 3150sq.in. (25 x 4.5 x 28) (Size of pleat x number of pleats)
Square inches of usable mask filter area: 9.75 sq.in (3 x 3.25)
Portion of filter used: 0.0031 (9.75sq.in./3150sq.in.)
Nominal CFM for MERV12 filter mask: 5.28cfm (.0031x1708cfm)

CFM rates appear to be well over the average human's breathing rate.

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If anyone has concerns about this device or any device like it, feel free to voice your concerns in the comments!

Read this! I am in no way able to adequately scientifically test the device I design in this video and can make no claims as to its functionality. Downloadable materials are for educational and entertainment purposes only. If you print and wear one of these in any situation you will be doing so at your own risk! All brands, companies, programs, logos, etc used in this video are for illustrative purposes only and do not indicate endorsement of this video by the any of those named. I want to help with the current situation any way that I can but I'm not a doctor or a scientist. Please be understanding.

Video Description:
Not everyone’s face fits the standard template. This design attempts to address some issues with standard masks and respirators. Get the PERFECT FIT with COMFORT no matter your size or shape. This design uses replaceable air filters and inexpensive standard materials. The whole process is spelled out in this video in a way that just about any maker will be able to create a mask of their own or for someone else.

Jump List
0:00 - Intro and Basic Concept
3:00 - Method and Materials
8:38 - Design
14:39 - 3D Print
16:08 – Closer Look at the Design (Animation)
17:07 – Finishing and Assembly
20:27 - Testing and Review
25:02 - Cost and Conclusions

Shopping list:
Braided elastic: https://www.joann.com/dritz-braided-elastic-1-4in/prd2901.html
Plastic: PETG any manufacturer or supplier will do. People have also printed this with PLA.
Filter - This has been thoroughly discussed in the comments and description. Your call.
That's it.

Here is the download link for the part files. Let me know if there are any issues or improvements that can be made.
REMINDER - PRINT AT YOUR OWN RISK!
https://www.thingiverse.com/thing:4239615

I'm now on Patreon!!! The reward levels are very basic for the time being but I promise to bring merch and other perks in the near future.
https://www.patreon.com/the3dhandyman

Видео Perfect Fit - High Airflow - Custom 3D Printed Respirator Face Mask - Replaceable filters канала The 3D Handyman