Worcester Greenstar 4000 12kW System Boiler
The Worcester Greenstar 4000 12kW System Boiler is an efficient and dependable option for homes that rely on a stored hot water cylinder. Designed with versatility in mind, it’s ideal for small to medium-sized properties that want consistent heating performance and reliable hot water delivery throughout the day.
Its compact and lightweight build makes installation straightforward, even in tighter spaces. The boiler comes with a built-in pump and expansion vessel to simplify the setup, and it’s compatible with a wide selection of optional controls, giving homeowners the freedom to tailor their heating system for better comfort and improved energy savings.
Whether you're upgrading an older boiler or installing a new system, the Greenstar 4000 offers dependable performance with modern efficiency.
Key Features
Compact, space-saving design
Built-in pump and expansion vessel
Optional plug-in diverter valve
Wide range of compatible controls for enhanced efficiency
Technical Specifications
Manufacturer: Worcester Bosch
Model: 4000
MPN: 7733600377
SKU: 79140
GTIN: 4057749856661
Performance:
CH Output: 12kW
CH Output (BTU): 40,000
ErP Heating Rating: A Rated
Dimensions:
Height: 724mm
Width: 400mm
Depth: 310mm
Weight:
Gross: 33.2kg
Warranty:
7 Years (subject to manufacturer T&Cs)
FAQs
Is the 12kW output suitable for my home?
The 12kW model is ideal for **small to medium-sized homes** with moderate heating requirements and a stored hot water cylinder.
Does this system boiler require a separate hot water tank?
Yes. As a **system boiler**, it works alongside a hot water cylinder to deliver consistent hot water throughout the home.
Can I use smart controls with this boiler?
Definitely. The Greenstar 4000 range supports a **wide variety of optional smart and traditional controls**, allowing for greater comfort and energy efficiency.
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