Air purifiers are machines that help us breathe cleaner air when for some reason the air quality indoors is bad. There are a lot of companies and models out there for costumers to choose and most of them offer some kind of High-efficiency particulate air filtration aka (HEPA).
HEPA filters are made by compressing randomly together thin fibers of glass or synthetic material like PP+PET with diameters between 0.5 and 2.0 microns. The air space between HEPA filter fibers is typically much greater than 0.3 μm.
A small note for my readers, it is believed that a HEPA filter acts like a colander or sieve where particles smaller than the largest opening can pass through but this is a great misconception and incorrect. HEPA filters are designed to target much smaller particles, and they are trapped through a combination of the following four mechanisms: diffusion, interception, inertial impaction, and electrostatic attraction.
So far so good, now I would like to address a thought that I have with the manufactures. 98% of the available and good air purifiers in the market miss a feature and it has nothing to do with the filtration rates or effectiveness of the product. During summer times I want to be able to take advantage of the airflow the air purifier creates and direct the air to me, that way I breathe clean air plus I keep my body temperature down, at the end of the day I make better use of the product.
I am not fond of the air conditioning systems because of the impact they have on the environment and electricity bill. How many times I have thought that it would be nice to have one product to address both problems; poor air quality and fresh air. Designing an air purifier with adjustable fins that will direct air in a specific place is what you need to think to implement in future generations of air purifiers, I personally think is an easy task to develop such a feature.
Some of you will tell that air purifiers are designed with airflow patterns in mind specifically to direct clean air to the ceiling in order to produce a circular airflow and push dirty air from the floor. This logic is a bit old as a new airflow will be established again even when we direct air to a different place in a room. Let’s use the motor for more than one purpose, please.