Leaderboard

In my own experience, a larger (30kW+) combi costs very little more than one of, say 24kW. As you know, it isn't the radiator output that matters so much as the peak HW demand if you want to fill a bath (or even run a shower) with a reasonable flow rate. My seaside flat has a Pro-Combi Exclusive 30kW; this heats up the rads in a matter of seconds and gives a good HW flow when needed. These boilers (24, 30, 35kW) are made by Ideal and well thought-of; they are cheaper however than the badged Ideal equivalents- and a lot cheaper than (say) Worcester Bosch. (And you don't have to go to Germany for an expensive replacement part if you accidently cook something!)