Just a quick question really - I"m wanting to replace an old kitchen radiator with a new one. The existing radiator is 1340mm in length and 600mm high. I'm not sure whether I have to find a new one, EXACTLY the same mm in length - or can this be adjusted with fittings - I haven't got a clue how plumbing works. Obviously the existing pipework is in situ. Presuming the height doesn't matter? Thanks in advance for what may seem a silly question!