Hot water mode
Whenever a hot water tap is turned on the incoming mains water will activate a flow switch which, via the electronic control system, ignites the pre-mix burner. Boiler output is automatically boosted to maximum to heat the incoming cold water as it passes through the heat exchanger. Electronic controls modulate the boiler output downwards to ensure accurate hot water temperature.

Keep hot facility
All the Greenstar i Junior models have an in-built keep hot facility which will keep the primary water within the heat cell hot. This will ensure that hot water is delivered instantly to the opened outlet.

Eco mode
With the Eco mode button activated the keep hot facility is de-energised and the hot water will be heated from cold. A slight delay should be expected before the hot water is at full temperature when in the Eco mode.

Central heating mode
On a Central Heating demand, the boiler will initially fire at minimum output before modulating upwards to meet the actual system requirement. Electronics within the boiler continually monitor the heating flow temperature increasing or decreasing output on demand. A built-in bypass and anti-cycling device makes the Greenstar i Junior range particularly suitable for use on systems with TRV's (Thermostatic Radiator Valves).

90.1% Energy efficiency rating
EST Registered
LPG boiler available

genuine one man lift - only 27kg
compact dimensions - siting flexibility
WB3 series heatcell - robust cast aluminium/silicon construction
Heatronic III control system - sophisticated boiler management
compact hydraulic - efficient and reliable
wall mounting frame with pipes behind - no exposed pipework
low NOx and CO2 emissions - environmentally friendly
keep hot facility - instantly heated hot water 

DELIVERY IS NORMALLY 3/4 WORKING DAYS.

Please note prices in drop down below exclude VAT.