Step-by-Step is an aluminium radiator whose surface is broken into overlapping pleated modules, so its shape shifts as you move around it. Modules can be used singly or in pairs, tilting left or right, giving twenty combinations across the available heights. It projects just 7.8 cm from the wall and hides all supports and connectors. It comes in hydraulic, electric and mixed versions, with a towel rail and hook for bathrooms.