Worcester Bosch Greenstar 4000 30kW Combi Boiler with Horizontal Flue and Filter

Efficient, Quiet & Reliable Heating for Modern Homes

The Worcester Bosch Greenstar 4000 30kW Combi Boiler is one of the most popular choices for medium-sized homes, offering outstanding performance, excellent energy efficiency, and ultra-quiet operation. With its sleek design, intuitive controls, and advanced technology, it’s a perfect choice for households looking to upgrade their heating system with a reliable, future-ready boiler.

This pack includes the horizontal flue kit and a central heating filter, helping protect your system from sludge and debris while ensuring maximum boiler efficiency and lifespan.

Why Choose the Greenstar 4000 30kW Combi Boiler?

✔️ Ideal for medium homes – Easily handles 2-3 bedrooms and 1 bathroom
✔️ A-rated efficiency – Reduces energy bills and carbon footprint
✔️ Extremely quiet operation – One of Worcester Bosch’s quietest boilers yet
✔️ Modern design with easy-to-use LCD display – Perfect for kitchen or utility room installation
✔️ Quick tap function – Reduces water waste and waiting time
✔️ Built-in frost protection – Protects boiler during colder months
✔️ 10-year guarantee (when installed with Worcester filter and controls, T&Cs apply)

Key Features

• 30kW output – ideal for medium-sized properties

• Compact dimensions – fits inside a standard kitchen cupboard

• Wireless connectivity ready (compatible with Bosch EasyControl)

• Fast hot water delivery with no need for a separate cylinder

• High-efficiency modulating pump for lower energy usage

• Built-in frost protection and Quiet Mark accreditation

• Includes horizontal flue kit and system protection filter

Key Specifications

• Brand: Worcester Bosch

• Model: Greenstar 4000

• Output: 30kW

• Boiler Type: Combi (Combination) Boiler

• Mounting: Wall-mounted

• Efficiency Rating: A-rated (ERP)

• Dimensions: 724mm (H) x 400mm (W) x 310mm (D)

• Flow Rate: 12.3 litres per minute (ΔT 35°C)

• Fuel Type: Natural Gas

• Warranty: Up to 10 years (T&Cs apply)

What’s Included?

• 1 x Worcester Bosch Greenstar 4000 30kW Combi Boiler

• 1 x Horizontal flue kit

• 1 x Worcester Bosch system filter

• Installation and user manuals

✨ Upgrade your home heating with the Worcester Bosch Greenstar 4000 30kW — efficient, reliable, and designed to perform for years to come.