Dear Air Purifier Manufacturers

An Introduction

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.

HEPA Fiber2_0094
Clean HEPA fibres

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.


Open Letter

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.

fins airflowair purifier airflow


3 thoughts on “Dear Air Purifier Manufacturers

  1. Great Idea Sotirios. Additionally, the adjustable fins would also make it possible to change the internal air circulation patterns and e.g. preventing the circulation to create negative pressure in areas where dirty air could more easily enter the room (e.g. gaps near windows and doors).
    I once had an air purifier placed next to a leaky window and the constant airflow across the window drew in a lot of dirty air through small gaps in the window frame and made it more difficult for the purifier to bring down the particles.


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