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.

Greenstar 550cdi Highflow (Floor Standing) 41.1KW Boiler Review

The Greenstar 550cdi Highflow is a floor standing boiler that is manufactured by Worcester Bosch to produce high levels of performance and efficiency. This 550cdi Highflow boiler is robust enough to stand up to the highest heating and hot water demands.

This combi boiler will deliver the ultimate in flow rates as it will produce an abundance of hot water to your home. The ‘keep hot’ facility ensures that hot water is produced in an instant and this enables the boiler to run multiple bathrooms at once for example to provide hot water to 2 showers at once and a bath at once with ease.

The difference between the Worcester Bosch 440 cdi and 550 cdi is it has the extra bit of power needed for a large home as it will certainly cover all your heat and water demands. Heating capacity is 10 – 14 radiators at ease.

The beauty of buying a Worcester Bosch cdi is that it is has a reputation for quality components and excellent after sales service.

The down size to this boiler is its size it will not fit in a kitchen cupboard and it can not be wall mounted. You need space for this boiler as it measures 850mm x 600mm ideally this could be located under a kitchen worktop or in a utility room or a walk in cupboard.

Summary of Tech Spec

Below, you’ll find a summary of the important info and tech specs for Greenstar CDi Highflow 550:

  • Heating output:30kw
  • Hot water output:1kw
  • Ideal for:Large homes with multiple bathrooms, high hot water demand and 10 – 14 radiators
  • ERP rating:A, 93% efficiency
  • Guarantee:10 years

(*10 year guarantee subject to the boiler being serviced annually by a Gas Safe Registered engineer).

Warranty and Guarantee

Although Worcester Bosch boilers are incredibly reliable, you’ll still want to ensure your investment is protected should anything go wrong, which is why you need a good guarantee. When you purchase a boiler from the Worcester Bosch Greenstar range you will receive a 5 year warranty as standard that can be upgraded to 10 Years of warranty cover to give you complete peace of mind.


Why choose a Worcester Bosch Greenstar boiler?

Worcester is the first choice for millions of quality and value focused homeowners. In a recent Worcester customer satisfaction survey it has been revealed that they are also the choice of professional tradesmen too, with 9 out of 10 heating engineers choosing Worcester to provide warmth and hot water for their homes and families.

worcester bosch logo


  • Excellent technology
  • Large Combi Boiler
  • A rated – highest possible efficiency rating
  • Floor standing large boiler
  • Easy to service removable side panels
  • Suited to large home needs lots of hot water
  • Strong flow rate of 14.7 litres per minute
  • No water tank required.
  • Up to 10 years warranty
  • Excellent Which? reviews score of 75%

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