Micro Fiberglass for HEPA/ULPA Filtration

HEPA/ULPA rated filter materials provide the highest purity in air filtration. They are catagorized under different efficiency classes according ISO 29463. Major applications include air filters for clean rooms, hospitals, and industrial processes. HEPA/ULPA filters are the final filters in multi staged filtration configurations and targeted at removing ultrafine particles like viruses or smoke and soot.

HEPA/ULPA Filtration

Thomas Miowsky

Thomas Miowsky
Portfolio Manager

"Johns Manville's Evalith® micro fiberglass is the key component in specialty glass nonwoven used in ultra-pure air and liquid filtration. They combine fine diameter with strength, consistency, and purity."

Micro Fiberglass

What is micro fiberglass?

Micro fiberglass has a fineness in the micron or sub-micron range. It is produced using molten glass to form fine fibers that are subsequently stretched. The stretching can be reached by applying centrifugal forces or by air attenuation.

Jörg Meier

Jörg Meier
Product Development Leader

"Did you know that Johns Manville's advanced technology allows us to offer the finest Evalith® micro fiberglass (code 90) in the range of 200 nm fiber size?"


ISO Certificates
Safe Use Instructions
Scott Coons

Scott Coons
Chief Sustainability Officer

"Johns Manville provides world class Evalith® micro fiberglass materials enabling filter producers achieving high efficiency, low pressure drop solutions while reducing operating energy costs."

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