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Greenstar 42CDi (manufactured April 2007 - July 2012)

Greenstar CDi boiler in kitchen
Greenstar CDi combi boiler


Which? Best Buy logoThe Greenstar CDi gas combi boilers are our top of the range appliances.

You can control both the hot water and central heating temperatures on a Greenstar CDi combi. They also offer the widest choice of operating features within our gas boiler range, providing the ultimate in user convenience, performance and economy.

Greenstar CDi 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.

For further peace of mind, every boiler in Worcester’s Greenstar gas and LPG condensing boiler range has been awarded a Which? Best Buy accreditation.

Image of 5 year guarantee logo (with extra padding)5 year boiler guarantee until 31st December 2012 (terms and conditions apply). See promo page for details.

10 year guarantee on primary heat exchanger.

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)


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Features and benefits

  • Best boiler efficiency rating (SEDBUK band A)
  • Fully condensing in both central heating and domestic hot water modes
  • Keep hot facility - instantly available hot water
  • Wall mounting frame allows pipework to be hidden from view

  • Low NOx and CO2 emissions - environmentally friendly

  • 5 year boiler guarantee until 31st December 2012, terms and conditions apply (standard guarantee: 2 years)

  • 10 year guarantee on primary heat exchanger
  • 5 year anti-scale guarantee on domestic hot water heat exchanger

  • Hot water and central heating temperatures can be controlled

  • Multi-directional fluing means boiler can be sited in a wider variety of places
  • Mechanical, digital and new generation intelligent controls all compatible
  • Heat load and flow generated precisely to meet the heating system’s requirements using a modulating pump

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As a manufacturer, we supply through trade rather than directly to the public which is why we are unable to publish prices on our website.

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