Worcester Greenstar 2000 25kW Combi Boiler
The Worcester Greenstar 2000 25kW Combi Boiler is a modern, energy-efficient heating solution designed to deliver reliable performance and excellent value for money. Ideal for small to medium-sized homes with a single bathroom, this compact combi boiler provides both heating and hot water without the need for a separate cylinder, making it perfect for properties where space is at a premium.
Winner of the Which? Best Buy Award, the Greenstar 2000 combines advanced engineering with trusted Worcester Bosch quality — ensuring you enjoy warmth, efficiency, and peace of mind all year round.
Quiet, Efficient, and Environmentally Conscious
This model is Quiet Mark accredited, operating at an ultra-quiet 47dB(A), making it one of the quietest boilers in its class. With an ErP A-rated efficiency (94% efficiency for central heating), the Greenstar 2000 is designed to reduce your gas consumption and environmental footprint.
Thanks to its market-leading 1:10 modulation range, the boiler can modulate down to 3kW, ensuring it only uses the energy it needs — helping you cut down on fuel waste and heating costs.
Flexible and Simple Installation
The Worcester Greenstar 2000 25kW Combi has been designed with installers and homeowners in mind. It features in-line hydraulic and gas connections, a pre-wired mains cable, and a PRV positioned for flexible pipe routing options.
For even more versatility, rear piping accessories are available, making installation quicker, tidier, and adaptable to your home’s layout. Whether replacing an older system or installing from new, this boiler makes the process smooth and efficient.
Advanced Control Compatibility
This model is fully compatible with Worcester Bosch wireless RF controls as well as third-party 230V external controls, giving you flexibility to manage your heating system the way you prefer. Intelligent controls can help you further enhance efficiency and comfort throughout your home.
Peace of Mind Guarantee
The Greenstar 2000 comes with a 7-year guarantee* when installed with any system filter, ensuring long-lasting performance and reliability from a brand you can trust.
Key Features & Benefits
Winner of the Which? Best Buy Award
Ideal for small to medium-sized properties with one bathroom
Quiet Mark accredited – operates at just 47dB(A)
A-rated efficiency – 94% ErP efficiency in central heating
Market-leading 1:10 modulation range – modulates down to 3kW
In-line hydraulic and gas connections for easy installation
Pre-wired mains cable for convenience
PRV positioned for multiple pipe routing options
Rear piping accessories for flexible installation
Compatible with Worcester RF and third-party 230V controls
7-year guarantee* when installed with any system filter
Maximum flue length: 12m horizontal / 12m vertical
Technical Specifications
Model: Worcester Bosch Greenstar 2000 25kW Combi
Boiler Type: Combination (Combi)
Fuel Type: Natural Gas
Output: 25 kW
ErP Efficiency Rating: A (94%)
Sound Level: 47dB(A)
Flue Length: Max 12m horizontal / 12m vertical
Guarantee: 7 Years (with system filter)
Modulation Range: 1:10 (down to 3kW)
Mounting: Wall-mounted
Fitting Location: Internal
FAQs
1. What type of property is the Worcester Greenstar 2000 25kW Combi best suited for?
This combi boiler is ideal for **small to medium-sized homes** with a single bathroom. It provides both central heating and instant hot water without requiring a separate cylinder, saving valuable space.
2. How quiet is the Greenstar 2000 during operation?
Extremely quiet! The boiler operates at just **47 decibels**, which is roughly equivalent to a quiet conversation. It’s also **Quiet Mark accredited**, confirming its low-noise performance.
3. How can I maximise the boiler’s efficiency and lifespan?
For best results, have the boiler installed with a **system filter** (to qualify for the 7-year guarantee) and pair it with a **smart or RF control system**. Regular annual servicing will also keep it performing at peak efficiency.
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