Worcester Bosch Greenstar CDi Compact Boiler Review Re March 3, 2023

Worcester Bosch Greenstar CDi Compact Boiler Review

Customer and engineer in the kitchen next to boiler

Are you looking for a new boiler to keep you warm and cosy during those chilly winter months? Look no further than the Worcester Bosch Greenstar CDi Compact Combi Boiler! This trusty little beast will heat your home with all the power and efficiency your home needs. In this blog, we’ll review Worcester Bosch’s best-selling boiler, the Greenstar 28CDi, without leaving you scratching your head over complicated jargon. So, let’s dive in and take a closer look at this bad boy – your chilly toes will thank you! 

The Worcester Bosch CDi Compact Boiler range comes in 3 sizes 28kW, 32kW and 36kW, but before we talk about these models, let’s take a quick look at the brand, Worcester Bosch.

Worcester Bosch

Worcester Bosch is one of the pioneers in the heating industry. They’re known for producing excellent boilers that are reliable, energy-efficient, and easy to use. 

The brand was founded in 1962 in Worcester and has become one of the leading manufacturers of domestic boilers in the UK.

Worcester Bosch offers a variety of boilers to suit different homes and heating needs, including combi, system, and regular boilers. They are committed to innovation and have created a range of cutting-edge technologies to make their boilers even more efficient, such as their Greenstar range which uses condensing technology to maximise efficiency and reduce energy waste. 

According to their website, Worcester Bosch boilers are highly energy-efficient – which can result in savings on heating bills, up to £340 per year.

The brand has received numerous awards for its products and customer service, including the Queen’s Award for Enterprise in Innovation and Which? Best Buy award

When it comes to brand popularity, YouGov ranked Worcester Bosch the number one most popular brand in home appliances (Q4 2022). 

Worcester Bosch has also received praise for their customer service and aftercare, reflected in their high Trustpilot score of 4.6/5. Their customers are consistently pleased with their boiler’s performance and the quality of their service.

Worcester Bosch CDi Compact Boiler

The Greenstar CDi Compact is a range of combi gas boilers from Worcester Bosch.

This range comes in different sizes including; 28kW, 32kW, and 36kW.

The Greenstar CDi Compact combi boilers are designed to save space, making them ideal for smaller homes and flats in addition to medium-sized homes.


Small But Mighty!

Despite their small size, the Greenstar CDi boilers are powerful and highly efficient; These compact boilers can provide ample heating and hot water for a small to medium-sized home.

Save Money without Compromising on Warmth

Another key feature of the Greenstar CDi Compact range is its energy efficiency. These highly efficient boilers use less fuel to heat water and keep your home cosy and warm, meaning they can help you save money on your energy bills and reduce your carbon footprint. Not only will you be able to stash some cash and splurge on your favourite guilty pleasures (like buying a brand new Amazon Echo Dot 5th Gen Smart Speaker, maybe!), but you’ll also be doing a solid for Mother Earth by reducing your carbon footprint and helping to protect the environment.

Worcester Bosch CDi Compact Boiler Tech Spec

  • kW Output – 28kW | 32kW | 36kW
  • Hot water flow rate: 11.4 l/pm | 13.1 l/pm | 14.7 l/pm
  • ERP Rating: A-Rated 
  • Energy Efficiency: 94%
  • Dimensions:  Height 690mm, Width 390mm, Depth 280mm
  • Suitable for: small-medium homes.
  • Price range: starts from £2,290

Worcester Bosch CDi Compact Boiler Pros and Cons

Sold on the Worcester Bosch CDi Compact Boiler yet? If not, let’s help you weigh up the pros and cons;

Worcester Bosch CDi Compact Boiler Pros

  • High efficiency: The Worcester Bosch Greenstar CDi Compact Boiler range is A-rated. 
  • Compact size: If you live in a small home or a flat, you’ll know the struggle of finding the best place to hide the massive white box! Worcester Bosch Greenstar CDi boiler can fit into a kitchen cupboard or small storage space, giving you some valuable space back.
  • Quiet operation: The Greenstar CDi Compact Boiler is designed to operate quietly, so you can enjoy a lovely little afternoon nap!
  • Advanced controls: The boiler comes with advanced controls, such as an LCD display and an easy-to-use control panel. So you can effortlessly adjust the temperature to suit your preference.
  • Long warranty: The Worcester Bosch Greenstar 28CDi Compact Boiler comes with a 10-year warranty to give you peace of mind. 

Worcester Bosch CDi Compact Boiler Cons

Limited hot water output: The hot water output of this boiler may not be sufficient for larger homes with multiple bathrooms/bathtubs. 

Worcester Bosch Greenstar CDi Compact Guarantee

The Greenstar CDi Compact Boiler comes with a 10-year guarantee (not just a warranty). Read our blog if you’d like to know the difference between a guarantee and a warranty.

The Greenstar CDi’s long guarantee provides peace of mind, knowing that your heating system is covered for a decade in case of any defects or faults. 

This long guarantee is a testament to the quality of the Worcester Bosch boilers and their confidence in their reliability. It also demonstrates the brand’s commitment to customer satisfaction.

Which Greenstar CDi Compact model is best?

You can’t go wrong with any of the Worcester Bosch boilers – but if you’d like to know which Greenstar CDi Compact is best for your home, you’ll need to understand which boiler size your house needs (which is mentioned in this blog). As a rule of thumb, the smaller the house, the smaller the boiler size you’ll need. So if you have a smaller home opt for the Greenstar 28CDi Compact Combi Boiler.

Still in doubt? Chat with our heating experts on live chat, they’ll be able to recommend the best boiler for your home.

Worcester Bosch Aftercare

Buying a new boiler is a big decision as you don’t want to spend a substantial amount of money and end up having boiler issues (or terrible aftercare service) down the line. Straight off the bat, Worcester Bosch is not only known for providing thousands of households with reliable and efficient central heating systems, but they also provide the best aftercare there is.

Worcester Bosch prides itself on its superb customer aftercare. It’s something that you can clearly see throughout their excellent Trustpilot reviews – read what their customers said about them here;

“Our old boiler of nearly 20 years a Worcester was due for replacement. This boiler had given us great service during that period with very few problems..It was a no brainer to replace it with another Worcester and we opted for the green star range..so far so good definitely hotter and without a doubt more energy efficient by far than the old boiler.”

“My choice of boiler was influenced by personal experience of Worcester Bosch. I have visited the factory, seen their impressive training facilities and production line. This is a good quality brand, made for decades in Britain. The 10 year guarantee backs up this reputation and was also important in my choice. The boiler has now been installed for 12 months.”

Worcester Bosch Boiler Problems and Repairs

While Worcester Bosch boilers offer quality and reliability, things can still go wrong now and then. No boiler is immune from problems, which is why it’s so important that you have your Worcester Bosch boiler serviced every year.

If you’re experiencing an issue with your boiler, we have a blog covering common boiler issues and how to fix them.

Worcester Bosch Boiler Fault Codes

As with all appliances, over time, your boiler’s efficiency will naturally decline slightly; however, ensuring that your boiler has an annual service will help to protect your boiler from sudden breakdowns, and expensive repair costs.

If your Worcester Bosch boiler develops a fault, the corresponding fault code or error code will usually appear on the boiler. The fault code should help your engineer to identify and diagnose any problems with your boiler so that they can resolve them as quickly as possible.

If your boiler displays a fault code, our guide to Worcester Bosch Boiler Errors and Fault Codes should help you determine what the code means.

Worcester Bosch Boilers on Finance

When you get a Worcester Bosch boiler from WarmZilla, you can spread the cost of your new boiler over time. 

You can select our interest-free finance option (0% APR) over 24 months or up to 10 years (11.9% APR) if you want to get those monthly payments right down.

No more shelling out a huge chunk of change all at once. Instead, you can pay as little as £14 a month and enjoy your brand-new Worcester Bosch Greenstar boiler. 

And let’s be real, who doesn’t love the idea of saving money? With a new Worcester Bosch boiler, you could save up to £840 a year on your energy bills, when you upgrade your old inefficient boiler to a new Worcester Bosch Greenstar A-rated boiler (according to the Energy Saving Trust).