Worcester Greenstar 4000 15kW System Boiler
The Worcester Greenstar 4000 15kW System Boiler is a reliable and efficient choice for medium to large-sized homes, especially when paired with a stored hot water cylinder. Its compact, lightweight design makes installation straightforward, even in tighter spaces, while still delivering strong heating performance throughout the home.
With built-in components such as a pump and expansion vessel, the setup is simplified for installers. The boiler also supports a wide range of optional controls, giving homeowners the flexibility to fine-tune energy usage and enhance overall comfort and efficiency.
Key Features
Compact, space-saving design ideal for flexible installation
Built-in pump and expansion vessel for easy setup
Compatible with a plug-in optional diverter valve
Works with a wide range of optional heating controls
Designed for homes using a stored hot water cylinder
Technical Specifications
Manufacturer: Worcester Bosch
Model: 4000
MPN: 7733600379
SKU: 79142
GTIN: 4057749856685
Performance:
CH Output: 15kW
CH Output (BTU): 51,000
ErP Heating Rating: A Rated
Dimensions:
Height: 724mm
Width: 400mm
Depth: 310mm
Weight:
Gross Weight: 33.2kg
Warranty:
7 Years (Subject to manufacturer’s T&Cs)
FAQs
Is the 15kW model suitable for my property?
Yes — the 15kW output is well suited to **medium to large homes**, particularly those with a hot water cylinder and moderate heating demands.
Do I need a hot water cylinder with this boiler?
Yes. As a **system boiler**, it works alongside a stored hot water cylinder but doesn’t require a separate feed tank like a conventional boiler.
Can I use smart controls with the Greenstar 4000 range?
Absolutely. The Greenstar 4000 supports a **range of optional smart and traditional controls**, allowing you to improve efficiency and personalise your heating setup.
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