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Image of a Worcester Bosch Greenstar 4000, a 25kW gas combi boiler, against a green gradient background. The white boiler features a circular display. Text reads, "Worcester Bosch Greenstar 4000 25kW Combi.

Worcester Bosch Greenstar 4000 25kW Gas Combi Boiler

Original price was: £2,995.00.Current price is: £2,450.00.
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New Worcester 4000 25kW combi boiler fully installed nationwide

Experience total flexibility and peace of mind with the Worcester Bosch 4000 25kW boiler, designed to make installation a breeze!

Thanks to the extended flue lengths of up to 12 metres, you'll have the freedom to site it just about anywhere. The integrated 500ml condensate siphon helps protect against freezing, so you won't need to worry during those colder months. Plus, it carries all the reliable features of the award-winning Greenstar i series.

The pre-piping jig with rear piping makes replacing older Worcester i Junior or Si models simpler than ever, perfect for a fast, hassle-free upgrade. You'll be up and running with minimal disruption, so you can get back to enjoying a warm, cosy home in no time!

Top Features

The Worcester Bosch Greenstar 4000 25kW Gas Combi Boiler is designed for small to medium-sized homes with one bathroom, offering efficient heating and hot water solutions. Below are its key specifications:

  • Central Heating Output: 24 kW
  • Domestic Hot Water Output: 25 kW
  • Hot Water Flow Rate (at 35°C temperature rise): 10.2 litres per minute
  • Dimensions: Height 724 mm x Width 400 mm x Depth 310 mm
  • Weight: 32 kg
  • Energy Efficiency Rating: A (94% efficiency)
  • Noise Level: 45 dB
  • Control Interface: Full-colour text display
  • Modulation Range: 1:10 (down to 3 kW)
  • Flue Lengths: Up to 12 m with 60/100 mm flues
  • Guarantee: 7 years standard, extendable up to 10 years when installed by a Worcester Accredited Installer with a Greenstar System Filter

This boiler features a modern design with quiet operation, making it suitable for various home settings. Its wide modulation range enhances efficiency, and the intuitive display ensures ease of use. The Greenstar 4000 is also compatible with smart controls, offering flexibility in managing your home's heating system.

 

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We offer free delivery on all installations, regardless of complexity. We're here to ensure your experience is hassle-free from start to finish.

If you want to cancel your order, you can do so within 14 days of receiving the delivery of the last goods. This policy provides you with the flexibility to make decisions that suit your circumstances, ensuring you're always satisfied with your purchase.