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Greenstar 42CDi Classic

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Greenstar CDi Classic gas combi boilers are our top of the range boilers.

They offer the widest choice of features within our gas boiler range, including the ability to control both the hot water and central heating temperatures, providing the ultimate in performance, economy and user convenience.

Greenstar CDi Classic combi boilers are unique in that they condense in both heating and hot water modes, resulting in greater efficiency and fuel savings.

The higher outputs of Greenstar CDi boilers can be suitable for larger properties with more than one bathroom.


Central heating output: 30kW
Domestic hot water flow rate: 17.2 litres per minute at 35 degree temperature rise (provided adequate mains water pressure is available)
Designed operational flow rate 15 litres per minutes at 40 degree temperature rise.


The Greenstar 42CDi Classic is 90.2% efficient and is in the highest possible efficiency category, SAP 2005 seasonal efficiency rating.