Worcester Bosch 8000 40kW Combi Boiler Including Flue & 15mm Scale Reducer

The Worcester Bosch 8000 40kW Combi Boiler Including Flue & 15mm Scale Reducer is a premium heating package designed to deliver powerful central heating and high-performance mains-pressure hot water for medium to large homes. Supplied with a horizontal flue kit and a 15mm Scale Reducer, this complete package helps protect the boiler from limescale build-up while ensuring long-lasting efficiency and reliable everyday performance. Built on Worcester Bosch's flagship Greenstar 8000+ platform, it combines exceptional engineering, ultra-quiet operation, and advanced smart heating technology.

Featuring a durable stainless steel heat exchanger, QuickTap® hot water technology, a modern full-colour display, and compatibility with Bosch EasyControl, the Greenstar 8000 offers outstanding comfort, excellent energy efficiency, and simple operation. Its sleek design and installer-friendly layout make it an ideal choice for both replacement heating systems and new installations.

Key Features

• 40kW Natural Gas Combination (Combi) Boiler
• Includes Horizontal Flue Kit
• Includes 15mm Scale Reducer
• Fuel Type: Natural Gas
• Instant mains-pressure hot water
• No separate hot water cylinder required
• ErP A Rated for heating and hot water
• Up to 94% efficiency
• Stainless steel primary heat exchanger
• QuickTap® hot water pre-heat function
• Full-colour LCD display
• Quiet operation
• Compatible with Bosch EasyControl
• Intelligent boiler modulation
• Automatic filling loop compatible
• Premium modern design
• Up to 12-Year manufacturer's warranty (subject to installation, registration, and manufacturer's terms)

Ideal for Medium to Large Homes

The Worcester Bosch 8000 40kW Combi Boiler is ideal for medium to large homes with one or two bathrooms and higher hot water demand. It provides both central heating and domestic hot water directly from the mains, removing the need for a separate hot water cylinder while delivering excellent flow rates and consistent water pressure throughout the property.

The included 15mm Scale Reducer helps minimise limescale build-up, making this package particularly suitable for properties located in hard water areas.

Powerful Heating & Instant Hot Water

Delivering 40kW domestic hot water output and an impressive 16.4 litres per minute flow rate (Δ35°C), the Greenstar 8000 comfortably supplies hot water to multiple outlets while maintaining efficient central heating performance.

Its innovative QuickTap® technology pre-heats the plate heat exchanger to reduce waiting time for hot water, helping minimise water wastage while providing greater comfort and convenience.

Compact Design

Despite its high output, the Greenstar 8000 features a sleek wall-mounted design suitable for modern homes where both performance and appearance matter.

Dimensions

• Height: 780mm
• Width: 440mm
• Depth: 365mm

The included horizontal flue and 15mm Scale Reducer provide a complete installation package while helping ensure reliable long-term operation.

Advanced Energy Efficiency

Rated ErP A with up to 94% efficiency, the Greenstar 8000 helps reduce energy consumption and lower household heating bills.

Its advanced condensing technology and intelligent modulation automatically adjust boiler output to match household demand, improving seasonal efficiency while maintaining optimum comfort.

Smart Heating Control Compatibility

The Greenstar 8000 is fully compatible with Bosch EasyControl, allowing homeowners to control their heating remotely, create personalised schedules, and optimise energy usage through intelligent temperature management.

Reliable Performance & Easy Maintenance

Designed with Worcester Bosch's renowned engineering quality, the Greenstar 8000 features a stainless steel heat exchanger, removable side panels, and an installer-friendly internal layout for straightforward servicing and maintenance.

Its premium full-colour display offers clear diagnostics and intuitive operation, while its exceptionally quiet performance makes it suitable for installation in kitchens, utility rooms, and open-plan living areas.

Warranty & Peace of Mind

The Worcester Bosch 8000 40kW Combi Boiler Including Flue & 15mm Scale Reducer includes up to a 12-Year manufacturer's warranty when installed and registered in accordance with Worcester Bosch's warranty requirements, providing long-term confidence and dependable after-sales support.

Why Choose the Worcester Bosch 8000 40kW Combi Boiler Including Flue & 15mm Scale Reducer?

• Complete boiler, flue, and scale protection package
• Powerful 40kW combi boiler
• Natural Gas compatible
• 16.4 L/min domestic hot water flow rate
• Includes Horizontal Flue
• Includes 15mm Scale Reducer
• QuickTap® hot water technology
• Bosch EasyControl compatible
• Premium stainless steel heat exchanger
• Up to 12-Year manufacturer's warranty