I am about to have my old boiler replaced, and have two options, either a standard boiler (as in current system) or a combi boiler. I live alone in a 4-bedroomed house and have two showers fitted...both runnning from the hot water supply. Can anyone say what is the best system to install please...maybe based upon experience ? My plumber recommends that if a combi is fitted, that the pipe runs to the hot water taps be as short as possible. Thanks.