Worcester Bosch Greenstar Heatslave II 25/32 Combination Oil Boiler 2022+

Worcester Bosch Greenstar Heatslave II 25/32 Combination Oil Boiler (2022+) – Brief Description

The Worcester Bosch Greenstar Heatslave II 25/32 is a high-performance oil-fired combi boiler, designed to deliver both central heating and instant hot water in one compact unit. Ideal for off-grid homes, this external boiler is suited for medium to large properties, offering powerful output and reliable performance. Featuring modern ErP compliance, compatibility with optional integral programmers, and multiple flue options (horizontal, vertical, or plume management), it ensures flexible installation. Backed by a 2-year guarantee, extendable to 5 years when installed with a Greenstar system filter, it's a trusted choice for energy-efficient, low-maintenance heating.

Benefits of the Worcester Bosch Greenstar Heatslave II 25/32 Oil Combi Boiler

High Output for Larger Homes
With a powerful 32kW output, this oil combi boiler is perfect for medium to large homes needing reliable central heating and instant hot water even in colder months.

Hot Water on Demand
As a combination boiler, it heats water directly from the mains meaning no need for a separate hot water cylinder, and you’ll have hot water when you need it.

Ideal for Off-Grid Properties
This oil boiler is an excellent solution for rural homes without access to mains gas, offering dependable heating with a trusted brand name.

Energy Efficient – ErP A-Rated
Enjoy lower energy bills and reduced environmental impact thanks to its A-rated energy efficiency under the latest ErP guidelines.

Flexible Flue Options
Supports horizontal, vertical, and plume management flues for versatile installation—suitable for various property layouts.

Compact & External Installation Ready
Designed to fit outside or in utility spaces with minimal disruption to your living area, measuring just 855mm (H) x 520mm (W).

Solar Compatible
Future-proof your home by integrating with renewable systems like solar thermal, supporting a greener, more energy-efficient setup.

Compatible with Optional Integral Programmers
Upgrade to smart programmable controls for easier scheduling, improved comfort, and better energy management.

Quiet & Reliable Operation
Worcester Bosch’s renowned build quality ensures low-noise operation and durable, long-lasting performance.

Up to 5-Year Warranty
Comes with a 2-year warranty as standard, extendable to 5 years when installed with a Worcester Greenstar system filter offering peace of mind and added value.

Key Features Summary:

• Boiler Type: Oil Combination Boiler

• Heat Output: 32kW

• Hot Water Flow Rate: 32kW output

• ERP Rating: A

• Dimensions: 855mm (H) x 520mm (W)

• Solar Compatible: Yes

• Flue Options: Horizontal (6m rear / 5m side), Vertical (8m)

• Warranty: 2 years (extendable to 5 years)
  
  

  Technical Specification – Worcester Bosch Greenstar Heatslave II 25/32 Combi Oil Boiler

  • Brand: Worcester Bosch

  • Model Number: 7731600262

  • Product Type: Oil Combi Boiler

  • Fuel Type: Oil

  • Range: Greenstar Heatslave II

  • Installation Type: Floor-standing external or internal installation

  • Heating Output: 32 kW

  • DHW (Hot Water) Output: 32 kW

  • ERP Rating: A-rated for heating and hot water

  • Solar Compatible: Yes

  • Flue Options:

    • Maximum Vertical Flue (125mm): 8 metres

    • Maximum Horizontal Flue (125mm): 6 metres (rear exit), 5 metres (side exit)

  • Dimensions:

    • Height: 855 mm

    • Width: 520 mm

    • Depth: Standard Heatslave depth (not specified)

  • Years Guaranteed: 2 years (extended to 5 years with Greenstar system filter)

  • Noise Level: Quiet operation

  • Suitable For: Medium to large homes, off-grid properties
    
    

    What’s in the Box?

     Worcester Bosch Greenstar Heatslave II 25/32 Oil Combi Boiler
     Installation and user manuals
     Warranty registration pack
     Safety valve and fittings
     Internal controls interface
     Integral components (expansion vessel, pump, etc.)

    Flue kit not included – must be purchased separately
    Programmer not included – optional integral programmers sold separately