Worcester Greenstar 30Si Compact ErP Combi Boiler
The Worcester Greenstar 30Si Compact ErP Combi Boiler is a high-efficiency, wall-mounted gas boiler designed for small to medium-sized homes with one bathroom. As part of Worcester Bosch’s trusted Greenstar range, this compact combi boiler delivers reliable heating and hot water performance while taking up minimal space — making it a smart choice for modern homes.
With a 94% efficiency rating and ErP A-rating for both heating and hot water, the Greenstar 30Si helps you save on energy bills while reducing your household’s environmental footprint.
Efficient, Compact, and Powerful
The Greenstar 30Si Compact combines performance with practicality. It offers a central heating output of 24 kW and a domestic hot water output of 30 kW, providing a steady flow rate of 10.7 litres per minute — ideal for homes with up to 10 radiators and a single bathroom.
Despite its strong output, this model’s compact dimensions (690 x 390 x 280 mm) allow it to fit neatly inside a standard kitchen cupboard, saving valuable living space.
Reliable and User-Friendly Design
Engineered for everyday convenience, the Greenstar 30Si features simple user controls, frost protection, and a low energy pump to reduce electricity consumption. It’s also LPG compatible, making it suitable for homes off the mains gas grid.
This model can be used with a wide range of optional mechanical, digital, or wireless programmers, allowing you to customise your heating system for greater comfort and efficiency.
With an up to 10-year manufacturer’s warranty (subject to T&Cs), you can enjoy total peace of mind from one of the UK’s most trusted boiler brands.
Key Features & Benefits
ErP A-rated efficiency (94%) – highly energy efficient
Heating output: 24 kW
Hot water output: 30 kW
Flow rate: 10.7 L/min @ 35°C rise
Compact size – fits within a standard kitchen cupboard (690 x 390 x 280 mm)
Wall-mounted design – space-saving and discreet
User-friendly controls for simple operation
Built-in frost protection for reliability in cold weather
Low energy pump – reduces electrical consumption
LPG compatible for homes without mains gas
Up to 10-year warranty (subject to manufacturer’s T&Cs)
Technical Specifications
Manufacturer: Worcester Bosch
Model: Greenstar 30Si Compact ErP Combi
Fuel Type: Natural Gas / LPG Compatible
Boiler Type: Combination (Combi)
Condensing: Yes
CH Output: 24 kW
DHW Output: 30 kW
Flow Rate: 10.7 L/min @ 35°C rise
Efficiency Rating: 94%
ErP Rating: A (Heating) / A (Hot Water)
Mounting: Wall-mounted
Dimensions (HxWxD): 690 x 390 x 280 mm
Standard Warranty: Up to 10 Years
FAQs
1. What type of home is the Worcester Greenstar 30Si Compact suitable for?
This boiler is ideal for **small to medium-sized properties** with **one bathroom** and up to **10 radiators**. It’s perfect for homes that need efficient heating and hot water without sacrificing space.
2. Can the Greenstar 30Si Compact be installed in a kitchen cupboard?
Yes! With compact dimensions of **690 x 390 x 280 mm**, the 30Si fits neatly within a **standard kitchen cupboard**, making it an excellent space-saving option.
3. How efficient is this model compared to older boilers?
The Greenstar 30Si Compact has an **ErP A-rating** and **94% seasonal efficiency**, making it significantly more efficient than older boilers. This means **lower energy bills** and **reduced carbon emissions** for your home.
4. Is it compatible with LPG fuel?
Yes, the 30Si Compact is **LPG compatible**, making it suitable for homes that are **off the mains gas network**.
5. What is the warranty period?
This model comes with a **standard warranty of up to 10 years**, giving you complete peace of mind when installed by a Worcester-accredited engineer.
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