Blueair fortifies the carbon with a blend of Potassium Hydroxide (KOH) and Potassium Iodide (KI) to produce the activated carbon used in our SmokeStop filters. The porous structure of carbon makes it ideal for trapping gas and odor, with one gram of activated carbon providing a surface area of over 1,000 square meters.  

The SmokeStop is specifically designed for environments with heavy gaseous pollutants, such as smoke, odors, and harmful VOCs.

Approximately 2 – 4 lbs of coconut-shell activated carbon, formulated with an added blend of Potassium Hydroxide (KOH) and Potassium Iodide (KI), work in the form of hundreds of pellets to trap dangerous chemicals and annoying odors.

The gradient filter structure resembles many filters in one, trapping particles of all sizes while maintaining maximum airflow. The progressive structure resists clogging and won’t re-release particles back into the air, even when the filter is heavily loaded.

Designed specifically to fit the Blueair 201, 203, 215B, 250E, 270E, and 303 units.