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Worcester Bosch Greenstar 30i Boiler Review

Similar to Anthony Joshua, the Greenstar i is pretty, packs a punch and is the UK's favourite. But, does it really have the credentials knock out all of the opposition? Delve in to our brief but wickedly useful review.

The Worcester Bosch Greenstar 30i might well be one of the UK's most popular boilers, having earned money from the pockets of thousands.

But so did PPI, and we all know how that ended. Or never ended.

In this review, we'll take an in-depth look at how the brand and boiler perform in key areas including power output, customer reviews, aftercare and warranty period. 

Important note: The Greenstar i range, which includes the 30i has now been replaced by the Worcester Bosch 4000

Need to know the cost of a new boiler, quick? Find out what replacement you need along with costs (takes 60 seconds).

Worcester Bosch Greenstar 30i Review: All of its ups & and all of its downs

Worcester have been churning out boilers since before Coronation Street started and rightfully earned the respect of UK homeowners and boiler replacement companies alike.

Worcester Bosch Greenstar 30i ReviewThe Worcester Bosch Greenstar 30i is straight from the 'Greenstar i' range, joining the Worcester Greenstar 25i - Worcester's cheapest and most popular combi boiler, in fact, the same boiler - just a 5kW's less powerful. See our boiler size calculator for more details on kW's.

The Greenstar i is their 'entry level' range of combi boilers and still boasts some great features, not least of which is an A-rating for efficiency, a pleasingly novel digital display and a reassuring 'Which?' Best Buy Award.

During the early noughties, an independent consumer association by the name of 'Which?'  started rating products and services. Today they release an annual boiler survey based on the feedback of installers, of which Worcester has contiued to perform well, hence the Award.


Want an exact price on a new boiler? Use our boiler quote calculator (no personal details needed).

Are there any better alternatives to a Greenstar 30i?

Overall, Worcester combi boilers are great all-rounders, offering reliability, fantastic warranties, and excellent customer service. Viessmann boilers, on the other hand, are often said to be technically superior, but since they are manufactured in Germany, parts can be a little more difficult to source. 

So ultimately, it's a personal choice - do you value excellent customer service and convenience more? Or superior German engineering? 

You can check the latest deals on Worcester Bosch boilers here, and see how the brand compared to another market leader in our Worcester Bosch vs Vaillant Boilers post. 

Worcester Bosch Greenstar 30i, top perk: 

Greenstar 30i PerkYou'll have got yourself a Worcester, feeling the relief of that peer pressure and convincing yourself it's great because - it's a Worcester, so it has to be?  

Customer reviews for Worcester boilers are probably one of the best indications you are bagging yourself a great boiler as they are consistently positive. 

Even better with a Worcester boiler, you will have secured yourself a hefty 10-year warranty (through Heatable), giving you long-lasting peace of mind, that if something does go wrong, you won't be left in the lurch.  

Learn all about combi boilers in our what is a combi boiler guide and see how the brand fared against Baxi in our Worcester Bosch vs Baxi comparison.


Want an exact price on a new boiler? Use our boiler quote calculator (your fixed price will appear on screen).

So what makes the Worcester Greenstar 30i tick? A delve into the details

Here are those stats:

  Worcester Bosch Greenstar 30i
ErP efficiency rating A
LPG compatible Yes
Warranty period  10 years exclusive to Heatable 
Heating output (kW) 24
Hot water output (kW) 30
Flow rate (l/m) 12.3
Solar compatible Yes
Dimensions (H,W,D) 690mm x 390mm x 280mm
Seasonal efficiency 89.6%
Display Digital

Beyond the boring - yet impressive - statistics, Worcester Bosch also made their Greenstar remarkably simple to use, with a clear informative display, a freeze-proof condensate pipe to reduce winter breakdowns, a low energy pump that reduces electrical consumption and most importantly - instantaneous hot water.

An embarrassment of riches - not so modestly displayed.

Is your current Worcester Bosch condensing boiler experiencing problems? Check our Worcester Bosch Boiler Faults guide for common issues and potential fixes. 

Want to learn about the future of heating in the UK? Check out the latest innovation of hydrogen boilers.  

So, should you buy a Worcester Greenstar 30i combi boiler?

The Worcester Bosch 30i combi boiler is a fantastic boiler, offering reliability and incredible value for money. Worcester being based in the UK also means parts are very easy to obtain and their customer service is terrific.

As we've stated, you could also consider an Alpa E-Tec or a Viessmann Vitodens 050-W.

Customers reviews for Viessmann range from 'outstanding' to 'positively life altering'. An industry survey even found that the Viessmann Vitodens 050-W 29kW salvaged no less than seven failing marriages across the UK in 2018. Something which still has their competitors baffled.

We recently wrote a massive guide on the best combi boilers for 2020 and the best boiler brands and Worcester Bosch took the top spot.  So, this is certainly a boiler brand with credibility. 

However, boiler buying is often about getting the best for your budget and making sure you get a great warranty.

New boiler costs don't have to be out of your price range, in fact with boilers on finance, pay monthly options may be available to you. 

Read our Worcester Bosch vs Viessmann Boilers review if you need some help in choosing between these two big brands. 

Some of the brands most recent and popular models include the 2000, 4000 and the 8000, you can read our full reviews of them:

How to get the best deal on a new boiler

Looking for a Worcester Bosch Greenstar 30i best price deal? 

If so, get your new boiler installed with Heatable, here’s why: 

  • Gas Safe installation within 24 hours
  • Thousands of happy customers – an average score of 4.9 on Trustpilot (that’s better than the market leader).
  • Price match guarantee – if you find a cheaper quote, we will match (must be like for like)
  • Multiple payment options - interest free available
  • 10 year guarantee
  • Fixed price guarantee – no hidden costs
  • Save your quote until later

Use this clickable form to get a fixed price on the screen instantly.

Because we're online, our overheads are low which means we pass those savings on to our customers, ensuring they're always getting the best deal on a new combi boiler. Plus, because of the volumes that we install, we're able to access exclusive warranty lengths from our partner manufacturers.

For example, we can offer 10 years of protection on the Viessmann 050 range and the Worcester Bosch range whereas your traditional installer can only offer you 7. Boom.

Plus, all of our combi boiler installations come with upgraded wireless controls, an Adey Pro Filter and powerful chemical protection.


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Heatable is registered in England and Wales No. 08804726 (VAT No. GB205805920 ). Trading address is 1 Station Road, Great Sankey, Warrington, Cheshire, WA5 1RH. Heatable acts as a credit broker (not as a lender) and offers credit products through a panel of lenders. Heatable is authorised and regulated by the Financial Conduct Authority (reference no. 805259).

[1] Price based on a like for like combi swap in a 2 bed, 1 bathroom terraced home with a standard flue

[*] Installation dates are subject to installer availability

[ยน] only available on combi boiler installations

Financial Support: If you are in receipt of certain benefits, you may be entitled to claim a free boiler grant.