Layout Curve

Worcester Bosch Greenstar Highflow CDi Combi


The Worcester Bosch Greenstar Highflow CDi Combi is a SEDBUK A-rated floor-standing boiler.

It is designed for larger three to five bedroom homes with multiple bathrooms and a higher demand for water and heating usage.

Perfect for a growing or busy family. Worcester Bosch Greenstar Highflow CDi Combi Compare Boiler Quotes

Worcester Bosch is one of the UK’s most respected boiler brands. The Greenstar Highflow CDi Combi is renowned as being one of the best on the market.

All boilers in the top of the range Greenstar gas-fired range have been awarded a Which? Best Buy award and it’s easy to see why the latest addition to the line up has won this award. The industry-leading hot water flow rates make this the ideal choice for your large family home. 


How much does it cost?

There are two versions of the Greenstar Highflow CDi Combi boiler.

The 440CDi with 29kw costs on average £2,053.68 for the boiler without installation fees.

If your home needs a little more power then the 550CDi costs on average £2,447.70, again without installation fees.

Prices stated include VAT. Worcester Bosch Greenstar Highflow CDi Combi Compare Boiler Quotes

If you would prefer a boiler to include installation fees, go to


Is this boiler suitable for my home? 

A combi boiler produces hot water on demand and doesn’t require any additional components. This removes the need to have a water tank in the airing cupboard or extra tanks in the loft.

It also means you have water on demand, instead of having to wait for your water to reheat.

The 29kW unit supplies 20 litres of water per minute, and the more powerful 30kW unit will provide 25 litres per minute.

The Greenstar Highflow CDI Combi boiler will meet the heating and hot water requirements of a medium or large property with two bathrooms.

Your Gas Safe engineer will tell you which size boiler you need to run your home effectively and efficiently.


How efficient is the boiler? 

The Greenstar Highflow CDi is an A-rated floor-standing condensing combi boiler. It has an ErP rating of over 90% for efficiency, making it one of the highest-rated boilers you can buy.

It is also highly recommended by the Energy Savings Trust. Worcester Bosch Greenstar Highflow CDi Combi Compare Boiler Quotes

Installing the Worcester Bosch Greenstar Highflow Combi boiler will save you money on your energy bills especially if you are replacing a much older system. 


Is it user friendly? 

With a concealed user control panel that includes separate temperature control over your heating and hot water, the Greenstar Highflow CDi Combi is straightforward to use.

There is a clear reset button and easy system pressure gauge switch. This model will also work with optional controls to make your house work better for you.

Using the internet-connected Bosch EasyControl, you can monitor and control your hot water and heating from your smart device or your phone. This gives you the power to make your home warmer when you leave the office, so you can always ensure a comfortable environment when you arrive home. Worcester Bosch Greenstar Highflow CDi Combi Compare Boiler Quotes

The boiler also has frost protection which allows you to install it in a garage and protects you from a lockout in the colder months. 


What about the warranty? 

All Worcester Bosch Greenstar Highflow CDi Combi boilers come with a two to seven year warranty as standard. This covers you on both parts and labour. Worcester Bosch Greenstar Highflow CDi Combi Compare Boiler Quotes

However, you need to register your warranty online within 30 days of installation, otherwise the warranty will not stay valid for the full amount of time. 


What do we think? 

We can’t fault the Worcester Bosch Greenstar Highflow CDi Combi.

With the demands on most family household boilers, we think it ticks every box. We aren’t alone in our praise of the system, Which? Give it an overall score of 86% and the unit fits beautifully into your kitchen if required, fitting under most kitchen worktops. This means you can incorporate it into your home effortlessly. Worcester Bosch has also ensured the boiler is environmentally friendly and super-efficient. This will help you reduce your carbon footprint and will work well in an eco-friendly home.  Worcester Bosch Greenstar Highflow CDi Combi Compare Boiler Quotes



If you would like a boiler quote or any information click here 

Get a fixed price in 20 seconds

What fuel does your boiler use

Compare Quotes >

What our customers think

5 Stars on Trustpilot

Would recommend

Stressed when needed a new boiler but easy process with affordable finance. New boiler installed within a few days with option for next day.

Paul Jones 5 Star on Trustpilot

We were very impressed

On the day, they came on time. Lovely people, they kept everything clean. Explained everything to me. No mess, kept me informed.

Anne Cross 5 Star on Trustpilot

Great Experience

Great experience - quick to arrange, easy to work with the very responsive online team and all installed faster than expected.

Ms Baxter 5 Star on Trustpilot

Layout Curve
Compare new boiler prices in 20 seconds onlineGet Your Quotes >