Hi another combi related post here.. My son has just bought a 2 bedroom dormer end terraced house...with solid walls (no cavity)..But with plans to insulate/dry line....At the moment there is no heating system,hot water is by coal fired back boiler....We intend to install full combi fired heating/water. But which combi shold we go for? I'm biased towards Vaillant , after owning a 242e for 16 relatively trouble free years. But all suggestions gratefully considered...Bill