Radiator of a water circulation central heating system

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A radiator of a water circulation central heating system comprises hot fluid passing through at least one tubular member 1, and a heat dissipation element 3 attached to the at least one tubular member 1 to provide an increased surface area to transfer heat to the surrounding environment. The radiator may comprises of an array of stainless steel tubes 1 welded to stainless steel tubes 2, 6 at the bottom and top. A separator 2A may divide tube 2 into a distribution chamber having an inlet 2C and a collection chamber having an outlet 2E. Heat dissipation element 3 may comprise of a sphere machined from an aluminium alloy metal block with grooves 5 and fins 7 or fabricated by casting, and coated with an alkaline rare earth silicate aluminate oxide europium doped luminescent material to provide a photoluminescent coating that provides a visual effect of warmth by emitting a red, blue or yellow/green light. A plurality of elements 3 may be in a staggered arrangement or arranged in any desired way and attached to the tubes 1 by a retaining element such as circlips 4 or adhesive.