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Greenstar 28i Junior

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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.

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.


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