Greenstar 4000 Greenstar 4000 Greenstar 4000
Greenstar 4000 Greenstar 4000 Greenstar 4000
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Greenstar 4000 overview

Built on all the tried, tested and much-loved features of the Greenstar i, the Greenstar 4000 is instantly familiar and yet totally transformed in appearance, performance and installer plus points.

With outputs of 25 and 30kW, and flow rates up to 12.3 l/min (35°C), we’ve raised the bar with the speed and ease of installation, commissioning and servicing, alongside improvements in efficiency and control.

Encompassing features from our range-topping 8000 Style, informed by insights from installers and featuring real advances in siting flexibility, it takes what was the nation’s favourite boiler and makes it even better.

Our entire gas boiler range is able to run on a 20% hydrogen blend - so your customer can be confident it will run on gas for it’s lifetime. Learn more.

Standard Guarantee**

7 Year

With any Greenstar System Filter**

8 Year

With any Greenstar System Filter + £150*

10 Year

*Terms and conditions apply. Excelerate members, who are non-Worcester Accredited Installers, can achieve these guarantee lengths with an additional £150 payment to Bosch Thermotechnology Ltd. via their Excelerate account after the boiler has been registered. Full terms and conditions can be found online via your Excelerate account. **Terms and conditions apply. For full terms and conditions please visit

Features & Benefits

100% planet friendly packaging
Front access to all key components
Longer flue lengths up to 12m (60/100)
Intuitive full-colour long-text display
500ml condensate siphon
Quiet operation at 45dB(A)
Compatible with our Greenstar Intelligent Filling System
Modulates down to 3kW central heating output (1:10)
Increased DHW efficiency whilst reducing waste water
Full flow rates from 1 bar mains pressure

Technical Details

Greenstar 4000 25kW Greenstar 4000 30kW
Part number 7 733 600 371 7 733 600 373
ErP Efficiency Rating




ErP Data Sheet ErP Data Sheet ErP Data Sheet
LPG model available
Control Options *
EasyControl Compatible 1
Solar Compatible
Central heating output (kW) 24 24
Dimensions (mm) height x width x depth 724* x 400 x 310 724* x 400 x 310
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Related Accessories

Boiler Accessories Part number
Greenstar Intelligent Filling System 7 738 112 911 Installation Manual
Keyless Filling Link 7 716 192 610
Filling link 7 716 192 281

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