This company’s star product is a special filter installed in central-heating systems to prevent the build-up of black iron-oxide sludge. Adey uses a powerful magnet within the filter to remove debris that would otherwise clog the system and cause boilers to break down. Inventor and founder Chris Adey had the idea for the product while working as an engineer for British Gas. The company claims that MagnaClean is the first filter of its kind, and, as well as saving on maintenance calls, reduces heating bills and CO2 emissions. Sales grew 139% a year, from £1.5m in 2007 to £20.5m in 2010.
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