DIY room air filter experiment

While pondering buying a HEPA style air filter for my bedroom, I noticed that there wasn't much info on the availability of replacement air filters for many of the units being sold on eBay.

I started looking at general purpose filters and discovered tests had been done on various household materials to determine their effectiveness as filters for emergency mask use.
Some of the most effective filter materials were paper towels, coffee filters and other similar random-lay wood fibre materials.
Research suggests that standard kitchen paper towel may be capable of filtering around 95% of 1 micron and larger particles. Given that dust tends to range from 1-100 microns and mould/mold spores are roughly 4-20 microns in size it suggests that a simple piece of kitchen towel or multi-ply toilet tissue could theoretically be used as a cheap disposable filter.

Do not use paper as a fan filter on a computer. They require coarse high airflow filters to keep things like fluff and hair out.

I designed a prototype 3D printed housing (can also be made without a 3D printer) using a standard low power illuminated 120mm computer fan to pull air through a layer of paper towel. It relies on a low volume flow of air to hold the filter in place on a platten and filter it slowly and continuously. It does this with almost no noise and an extremely low power consumption.

This is an ongoing test. Let me know what you think of it.

If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-
http://www.bigclive.com/coffee.htm
This also keeps the channel independent of YouTube's advertising algorithms allowing it to be a bit more dangerous and naughty.

Видео DIY room air filter experiment канала bigclivedotcom