Does that sound like a spanner in the works to you??Ferroli DomiCondense!!
Really
TBH I fitted one a few weeks ago and the customer bought it for about £450 or less inc. timer and loop i think, but it looked OK and even ran OK considering some tried to run the heating with F n R valves closed, The remarkeable thing was it did'nt have the Ferroli cheap look to it.
PS.--Only the cold supply pipe got v.hot