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Greenstar 24i Junior

Mother and son with Greenstar boiler in background
Greenstar i Junior boiler


Image of Which 2013 (product pages)

In the 2014/15 report and for the fourth year running the entire range of Worcester Greenstar gas boilers have been awarded Which? Best Buy, the only boiler manufacturer to have been awarded Best Buy status*.

With more than 1 million Greenstar i Juniors already installed, the award-winning boiler series is already well-established in the UK.

Compact in size and with domestic hot water outputs of up to 28kW, the Greenstar i Junior is ideal for apartments and small to medium-sized properties with one bathroom.

Image of 5 year guarantee logo (with extra padding)5 year boiler guarantee as standard (terms and conditions apply)

10 year guarantee on primary heat exchanger and 5 year guarantee on the plate heat exchanger.

Central heating output: 24kW
Domestic hot water flow rate: 9.8 litres per minute at 35 degree temperature rise (provided adequate mains pressure is available)
Designed operational flow rate 8.6 litres per minutes at 40 degree temperature rise.

*Which? annual boiler report September 2014


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Features and benefits

New features and benefits

  • Domestic hot water control added to the boiler fascia, to compliment the central heating control, allowing the homeowner to benefit from increased functionality
  • Now compatible with a full suite of Worcester intelligent and weather compensation controls
  • Switch mode power supply to reduce energy consumption in standby mode by 61%

Established features and benefits

  • A rated efficiency (SEDBUK 2005 value)
  • 2 year guarantee, 10 year guarantee on primary heat exchanger and 5 year anti-scale guarantee on domestic hot water heat exchanger (subject to terms and conditions)
  • Compact dimensions – space saving, siting flexibility and a class-leading lift weight of 26kg
  • Ability to pre-plumb all 7 connections without the boiler being on the wall – gas, water, PRV & condensate connections. Robust wall mounting frame provided as standard allows space for pipes behind the boiler
  • Full range of Condensfit II horizontal and vertical flue options with optional plume management kit available

Product brochure

Greenstar gas boilers brochure image

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