HA500 Review

26 April 2021

See The Air is a influencer in air pollution industry. He gave HA500 an excellent third party review. The full contents can be found in here..


Latest News

Why indoor air quality can be worse than outdoor air quality?

When thinking of air quality and pollution many people’s imaginations will likely conjure images of smoke billowing from…

Negative Ions – The Basics

1. Generation of air ions When gas molecules in the atmosphere are subjected to external forces, they will…

PM2.5’s – The Basics

WHO statement: “WHO Air Quality Guidelines for Particulate Matter, Ozone, Nitrogen Dioxide and Sulfur Dioxide” The latest WHO…