Named Domestic H&V Product of the Year 2002, the Keston Duet combines the benefits of the Keston Celsius 25 boiler with the Keston Spa hot water storage system in one neat unit.  The hot water cylinder in this rig is available in 125, 150 and 200 litres and provides lashings of hot water when you want it.  There is an integral pump with in-built pump and fan exercise function, which operates when heating is off.

Keston Spa hot water storage systems are the perfect match for all Keston boilers and there is also a 400 litre model.