Worcester Bosch is one of the most reliable and trusted boiler manufacturers and have an excellent reputation for manufacturing and engineering, and this hasn’t been lost on their condensing combi boiler range.

Worcester Greenstar 25i Combi Boiler

The Worcester Greenstar 25i boiler is a small compact boiler that will provide enough hot water and heating for a smaller home such as a small 1 to 2 bedroomed terrace with 1 bathroom. The heating output is 24kw will power 5 – 8 radiators and has a flow rate of 10,2 litres per minute.

This boiler would not run two bathrooms at once and if you need you may want to choose a large boiler to fulfil your family’s needs.


Easy Installation

This new compact combi boiler will fit into a kitchen cupboard and all Worcester Bosch boilers are easy to install and run on a daily basis. As a Worcester Accredited Installer we have the experience and training to ensure the installation runs smoothly from start to finish

  • Central Heating Output: 24kW
  • Domestic Hot Water (DHW) Output: 25kW
  • Hot Water Flowrate: 10.2 litres/minute
If you wish to find out which boiler is the right size for your home you can request a home survey and an get an accurate quotation for your boiler installation.
worcester bosch logo
  • Excellent technology
  • Compact combi boiler
  • A rated – highest possible efficiency rating
  • Lightweight can mount onto the wall
  • Easy to service removable side panels
  • Suited to a 3 to 4 bed 2 bath large home
  • Strong flow rate of 14.7 litres per minute
  • No water tank required.
  • Up to 10 years warranty
  • Excellent Which? reviews score of 75%

When buying a new boiler, you want to speak to someone you can trust, that will support your needs now and in the future.

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What customers say about Clever Energy Boilers

My wife and I would like to thank you all for the competence and excellent work carried out at our home, from the estimate and the fitter who plumbed in the new boiler, to the electrician who made our programmer work with the boiler, an excellent team of manpower seldom seen with so called professionals.

Mr & Mrs Sheen, Doncaster

Thanks Tom for all your patience and time you spent answering all my questions and promptly ringing me back each time and thanks to your office staff always polite and helpful, a big thank you to John and Chris for installing the boiler and all the other jobs, both worked efficiently and cleanly, John was very good explaining everything as he went along. 

Mr Peacock, Holmfirth

I am very happy with the service I received. My new boiler has been installed very quickly and hassle free, I would definitely recommend this service.

Moyra Thomas, Stockport

Rizwan was a very good engineer he was very clean and made the place spotless after he had gone.

Mary Jones, Birmingham

Brilliant service from all the team. Thanks. Our old boiler died and from a very reasonable quote to fitting a new one within a couple days. Excellent advice and workmanship too.

Adrian Charlton, West Yorkshire

My old boiler went kaput, Clever Energy Boilers gave me a great price and fitted my new boiler within 3 days. Very pleased with the work carried out and would not hesitate to recommend to anyone needing a new boiler. A big thank you to both the installation team and the electrical man, both first class.

Mr Herbert, Yorkshire