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Worcester 4000 25kW Combi Boiler inc Horizontal Flue

From £1,210.00

The wall-mounted Worcester Bosch Greenstar 4000 25kw combi boiler offers an attractive design, improved installation and excellent performance.

ErP A-rated for energy efficiency and water heating efficiency, this 25kW condensing combi boiler includes an intuitive display panel for ease of use and it’s quiet too!

SKU: 7733600371 (GR4700iW 25 C NG) Categories: , , , Tags: , Product ID: 379

Description

The Worcester Bosch Greenstar 4000 25kW Combi Boiler is one of the quietest and most efficient models in its class. Designed for small to medium-sized homes, it offers reliable performance with a modern, compact design.

  • 25kW Output – Perfect for smaller households, delivering consistent heating and hot water.

  • Compact & Stylish – As a result, it blends seamlessly into kitchens or utility spaces.

  • Ultra-Quiet Operation – One of the quietest boilers available, ideal for living spaces.

  • A-Rated Efficiency – Consequently, you’ll save on energy bills while reducing carbon emissions.

  • Smart Thermostat Compatible – Furthermore, it’s ready for Bosch EasyControl and other smart systems.

  • Easy to Use – Simple controls and LCD display for everyday convenience.

  • 7 Year Warranty – Above all, backed by Worcester Bosch’s industry-leading warranty (when installed by a certified installer warranty can be extended – Please check with your installer)

Technical Specifications:

  • Boiler Type: Combi

  • Output: 25kW

  • Dimensions (mm): 724 x 400 x 300

  • Flow Rate: 10.2 litres/min (at 35°C rise)

  • Efficiency Rating: A (ErP Compliant)

Why Choose the Worcester 4000 25kW?

If you’re looking for an energy-efficient, space-saving, and whisper-quiet boiler, the Worcester 4000 25kW Combi Boiler is the ideal solution. Moreover, it’s compatible with modern smart home systems, giving you full control over your home heating—even when you’re away.

In conclusion, whether you’re replacing an older system or fitting out a new home, the 4000 series offers unbeatable value, performance, and peace of mind.

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Additional information

Weight 36 kg
Dimensions 40 × 31 × 72.4 cm
Watts

25kw

Boiler Type

Combi

Flue Options

Boiler Only – NO Flue, Worcester Bosch Horizontal Flue Kit 60/100 (7716191082), Worcester Bosch Vertical Flue Kit (7719002430)

Features & Benefits

  • testid=”product-features-subheading”>Product features

    • Front access to key components

    • Longer flue lengths, up to 12M (60/100)

    • Intuitive full-colour long-text display

    • 500ml condensate siphon

    • Quiet operation, 45dB(A)

    • Modulates down to 3kW central heating output (1:10)

    • Increased DHW efficiency but reduced waste water

    • Full flow rates from 1 bar mains pressure

    • Compatible with Greenstar intelligent filling system

Specifications

=”technical specifications table” data-testid=”technical-specifications”>

Brand Worcester Bosch
Flow Rate 10.2 L/min @ 35°C9 L/min @ 40°C
For Use With Worcester BOSCH horizontal flue 100850
Fuel Type Natural Gas
Range Greenstar 4000
Warranty 7 years
Weight 34.6 kg
Energy Rating A
Water Heating Energy Efficiency Class A
Output 25 kW
Depth (mm) 310
Efficiency (SAP 2009) 94
Mounting Type Wall
Supplier Product Code 333179 PK
Type Combi boiler
Height 724 mm
Width 400 mm
Model Number GR4700iW 25 C NG