We're having a vaillant boiler installed to replace our old boiler, this house is planning to be owned by us for a very long time. The installer has offered a magnaclean filter to fight sludge in the central heating and also a scale reducer fitted also for an extra £200 if we want it, my question is, will this £200 be worth it in the long-run? I haven't asked the central heating engineer because I felt this was a bias opinion, and I want a non-bias one....So any good? worth it?