CN95 certification is based on test standards previously developed by the CATARC research institute in its market study on the Chinese cabin air filter market. Mann+Hummel is supporting vehicle manufacturers in the certification process.

CN95 certification is based on test standards previously developed by the CATARC research institute in its market study on the Chinese cabin air filter market. Mann+Hummel is supporting vehicle manufacturers in the certification process.

CN95 certification is setting new standards in the cabin air filter market, although it is not yet a mandatory requirement for the sales of cabin air filters in China.

Along with fiberglass, some HVAC filters are made of pleated cotton.They consist of the same cotton used in countless other everyday products. The cotton is pleated and formed into an HVAC filter for the purpose of air filtration.You might be surprised to learn that pleated cotton HVAC filters are even more effective at removing particulate matter from the air than fiberglass HVAC filters. On the Minimum Efficiency Reporting Value (MERV) scale, they have a rating of six to 13, compared to just three to four for that of fiberglass HVAC filters.Another advantage of pleated cotton HVAC filters is their ability to produce static electricity.Why is this important? When a pleated cotton HVAC filter produces static electricity, particulate matter will cling to it.With that said, pleated cotton HVAC filters are more expensive than fiberglass HVAC filters, and they usually have a shorter lifespan. 

Akshara and Suditi tested different natural materials in greywater filtration.PHOTO COURTESY OF AKSHARA LEGALA.Akshara Legala and Suditi Bhatt, two high school students from Sacramento, California, developed and tested greywater filtration systems with natural filters. Greywater is a way to recycle used water, and a method environmentalists tout to save freshwater resources for drinking while greywater could be used for appliances and agriculture.Nurturing the next generation of scientists — like these young women — is one of our main goals at the Society for Science & the Public. To help us reach this goal, the Society recognized 20 students competing in science fairs throughout the country to recognize their STEM efforts. These Community Innovation Awards, part of the Society’s STEM Action Grants, recognize amazing young scientists.Read on below to learn how their device works and how they first became interested in science.

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