Portuguese-based Foursteel was founded in 2004 as a metalworking company, but soon after branched off into the heating products business. I spotted the geometric Diamond radiator—which comes in brushed stainless steel, white, textured black, and gold finishes—at the 2013 London Design Festival. The radiator is available in a 1205-watt hydraulic version for central heating or in a 1600-watt to 2000-watt electric version.
The Diamond XS radiator. Image courtesy Foursteel. 
The Foursteel booth at the 2013 London Design Festival. © Rita Catinella Orrell
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