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Worcester Greenstar Combi 28i Junior


IITC CODE Model Outputs:
7716130142 28kW     ( 28I )


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

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.

For further peace of mind, the Greenstar i Junior has been awarded a Which? Best Buy accreditation for the second year running and has undergone a series of enhancements including the addition of a domestic hot water control to the boiler fascia.

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: 11.4 litres per minute at 35 degree temperature rise (provided adequate mains pressure is available)
Designed operational flow rate 10.0 litres per minutes at 40 degree temperature rise.

Efficiency 90.1% A

The Greenstar 28i Junior is 90.1% efficient and is in the highest possible official efficiency category, SAP 2005 seasonal efficiency rating.

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




Greenstar Gas Boilers