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About Us

We at Cell Stone are actual air pollution control engineers with over 45 years of experience in the design and implementation of VOC remediation and RTO equipment.  We have extensive knowledge of the industry and suppliers for every type of RTO in production and we are some of the original patent holders of RTO technology.


Because of the pivotal role we play in your business, Cell Stone is committed to creating and maintaining strong relationships with our customers, built on a foundation of excellence, trust and compliance.


"NEFCO  continuously looks for the best value in ceramic RTO media with key criteria being pressure drop, thermal efficiency, and cost. We began trialing the use of Cell-Stone Ultra low pressure drop media in 2004. Since 2009, we have used only Cell-Stone Ultra media as it provides the best overall value. I would recommend use of the Ultra media to anyone having issues with siloxane buildup in their RTOs with loose/random media."

~ Manuel Irujo​

Vice President of Operations - NEFCO

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