Our engineer will be calling later to assess a problem with our combi boiler, but we think the time has come for a new one. He has always favoured a Valliant or Worcester Bosch. Due to a compact area, we need something no larger than 440mm width, 350mm depth and 710mm height. We need something suitable for a larger two bedroomed house, using the bath about once a day. Can anyone recommend a Valliant or Worcester Bosch which would serve our needs(we trust our chap, but it's would be good to have a second opinion)?