There a new boiler just comming on to the market , its called the Intergas combi compact hre.
This boiler does not have a diverter valve or plated heat exchanger so less parts to go wrong. It comes with 2 yr waranty with 10 yrs on the main heat exchanger
One advantage that this boiler has over all the rest is that it can be conected to cold and hot feed and the gas , the customer can have hot water while the ch system is installed no other boiler can do this
more info
This boiler does not have a diverter valve or plated heat exchanger so less parts to go wrong. It comes with 2 yr waranty with 10 yrs on the main heat exchanger
One advantage that this boiler has over all the rest is that it can be conected to cold and hot feed and the gas , the customer can have hot water while the ch system is installed no other boiler can do this
more info