Worcester Greenstar 4000 18kW System Boiler
The Worcester Greenstar 4000 18kW System Boiler is the direct upgrade of the Greenstar 18Ri, designed for small to medium-sized homes with one bathroom. Compact, wall-mounted, and modern in design, this system boiler is highly efficient, quiet, and packed with user-friendly features to make heating and hot water management simple and effective.
Efficient Heating and Hot Water
With a wide power range and ErP A-rating, the Greenstar 4000 18kW ensures efficient heating while helping to reduce gas consumption and lower energy bills. The boiler is suitable for homes with a hot water storage cylinder, making it ideal for properties with one bathroom where instant hot water from a combi boiler may not be sufficient.
Modern Features for Easy Operation
This boiler features a full-colour text display for straightforward operation, while its quiet design ensures minimal disruption. For modern smart home integration, the Greenstar 4000 18kW supports wireless connectivity with the Bosch EasyControl, giving you full control of your heating system from anywhere. Additionally, it is compatible with Greenskies solar panels, helping to further reduce energy costs and environmental impact.
Key Features & Benefits
Heat output: 18kW – ideal for small to medium-sized homes
ErP A-rated efficiency – reduces fuel costs and carbon footprint
Quiet operation – one of Worcester’s quietest system boilers
Wireless connectivity – compatible with Bosch EasyControl
Easy-to-use full-colour display – intuitive interface for all settings
Compatible with hot water storage cylinders – ideal for homes with one bathroom
Greenskies solar panel compatible – supports sustainable energy use
Compact wall-mounted design – dimensions: 724 x 400 x 310mm (HxWxD)
7-year manufacturer guarantee – for peace of mind
Technical Specifications
Brand: Worcester Bosch
Model: Greenstar 4000 18kW System (7733600381)
Boiler Type: System Boiler
Fuel Type: Natural Gas
Heat Output: 18kW
Mounting: Wall
Dimensions (HxWxD): 724 x 400 x 310mm
Colour: White
Weight: 30.6kg
ErP Rating: A
EAN: 4057749856708
Product Code: PN183938
FAQs
Is this boiler suitable for small homes?
Yes – with an 18kW output, it is ideal for **small to medium-sized homes** with a single bathroom.
Can it be used with solar panels?
Yes – the Greenstar 4000 18kW is compatible with **Greenskies solar panels** to help reduce energy costs.
How long is the warranty?
The boiler comes with a **7-year manufacturer’s guarantee** for complete peace of mind.
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