Blueair HEPASilent™ technology
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May 21, 2020

HEPASilent™ technology

Blueair's HEPASilent™ technology captures at least 99.97% of airborne particles down to 0.1 microns in size, removes germs and delivers especially high performance and efficiency by combining electrostatic and mechanical filtration technologies. This combination, pioneered by Blueair, delivers high Clean Air Delivery Rate (CADR) with whisper-silent operation and high energy efficiency. In fact, a Blueair air purifier works so quietly that you can not only sleep next to it, you might even have to check to make sure it is switched on. And on its lowest setting, a Blueair air purifier uses less electricity than a lightbulb. 



Not only do our air purifiers capture harmful airborne viruses and bacteria, but our proprietary HEPASilent™ technology also removes germs.  

Two technologies make the difference

Blueair's HEPASilent™ and HEPASilent Ultra technologies use a combination of mechanical and electrostatic filtration to capture and remove harmful particles from indoor air; our technology is designed to specifically and strategically electrostatically charge particles at a very low current. This makes the particles adhere to the polypropylene fibers in the filter more easily due to electrostatic forces, which allows the use of a less dense filter, so more air can be pushed through with less noise and less energy. 


The lower filter density allowed by the stickiness of the charged particles also reduces clogging. Filtration remains at peak performance levels longer, with high efficiency and longer lasting performance. 


Blueair Infographic transcript: HEPASilent &HEPASilent Ultra   (applicable to Protect, Pro, Classic 405,480i, 580i, 605, 680i models) 1. Ultra-silent fan draws air into the air purifier 2. Particles inside the air purifier are given a low electrostatic charge by a small ionizer. 3.The air is pushed through the filter and the statically charged particles can then cling more effectively to the filter and be removed from the air. 4 The room is filled with clean air once every 12.5 minutes
Blueair Infographic transcript: HEPASilent Technology: Post-filter electrostatic charge (Applicable to Blue pure, Blue pure Auto models and Classic 205, 280i) 1. The ultra-silent fan draws air into the air purifier. Most particles in the air The ultra-silent  fan draws air into  the  air purifier. Most particles in the air purifier are captured in the filter.  2. The particles that are not captured  then received a low electrostatic charge by a small ionizer (after the filter). 2. Blueair airflow is designed to frequent recirculation so that these charged particles are quickly sucked back into the air purifier, where they more effectively cling to the pre-filter and filter again The room is filled with the clean air once every 12.5 minutes.
How do air filters work?

In a Blueair filter, ultra-thin polypropylene fibers of different sizes and layers are interwoven to lock in particles. The filters capture larger particles like pollen, dust and pet dander as well as fine particles such as smoke.  



When the filter needs to be replaced (around every six months), just open the lid, take out the old filter and put the new one in. No screws, hooks or tools are needed. All done in less than a minute. An extra bonus is that Blueair filters don’t require additives or washing.  

Ready to start your clean air journey?


Blueair air purifiers are simple to use and have something special: We are the only major air purifier brand to verify 100% of our models for performance for Clean Air Delivery Rate (CADR).

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