The BOSS is designed for maintenance free, time-saving convenience, advancing beyond the need for messy filter/cartridge changes, added recycling or service costs. Offers a written Guarantee of Compliance and ISO 11143:2008 Certified over 99% with upto 16 chair capacity and 1 to 3 year service life. The only system able to meet requirements for dissolved mercury removal due to our advanced technology for more stringent regulations. FREE advertising as an Environmental Practice included.