
Are you considering the Worcester Bosch Greenstar 30i as your next combi boiler?
The 30i is such a popular choice for homeowners, and is the direct replacement to the bestselling 28i Junior – even better, it’s more energy efficient with a higher output to provide an even better flow rate to your taps!
And with its great guarantee and other benefits, it’s no wonder so many of my customers opt for this amazing boiler from Which ‘Best Buy’ brand Worcester Bosch.
But let’s take a closer look to discover why this boiler is such a favourite with homeowners across the UK.
Outputs to suit the average household
With a heating output of 24kw, the Greenstar 30i is perfect for heating the average 2 – 3 bedroom home, and with the 30kw hot water output providing 12.3 litres of water per minute to your taps, it’s ideal for running a bath or high pressure shower – just not both at once.
As a heating engineer, I find this boiler’s outputs are spot on, and provide faster flow rates for the modern home – after all, no-one has the time to wait half an hour for their bath to fill up.
Great energy efficiency
The 30i replaced the old 28i Junior to ensure the brand were up-to-date with the new ERP directive which was first introduced on the 26th September 2015. Because of this, it’s more energy efficient (ERP rated ‘A’) and meets all modern standards and requirements – meaning lower carbon emissions!
Wall-hung
Measuring in at 400mm x 700mm x 330mm, this is a wall-hung boiler that will look at home on your kitchen wall or inside a storage cupboard – however, it’s not compact enough for a standard kitchen cupboard or Edinburgh press.
TIP: If a compact boiler is absolutely necessary, you could pay a little extra to fit the Worcester Bosch Greenstar 30si, which is 390mm x 690mm x 280mm.
Can be flued vertically or horizontally
This boiler can be flued vertically or horizontally, which gives you some more options when it comes to choosing the location of your new boiler.
8-year guarantee
Worcester Bosch offers a brilliant 8-year no-quibble guarantee with the 30i (when installed with the brand’s magnetic central heating filter and by an accredited engineer), which means you’re covered for both parts and labour if anything goes wrong with your boiler.
And with dedicated engineers to attend call-outs, you’ll know your new 30i is in good hands!
TIP: It’s important to arrange an annual service with a Gas Safe registered engineer, as this keeps your guarantee valid for the full term.
At a glance
Finally, here’s everything you need to know about the Greenstar 30i at a glance:
- Heating output: 24kw
- Hot water output: 30kw (12.3 litres per minute)
- Ideal for: A 2 – 3 bedroom house or apartment. This boiler will fill a bath and run a high pressure shower (just not at the same time)
- Guarantee: 8 years (when fitted with Worcester Bosch magnetic central heating filter, by a Worcester Bosch accredited installer)
- ERP rating: A
Conclusion
So, there we have it! All you need to know about the Worcester Bosch Greestar 30i combi boiler, and replacement to the 28i Junior. It’s fully up-to-spec with the latest ERP regulations, and you can expect better flow rates than ever to your taps – along with the other benefits and features above.
What do you think of the Greenstar 30i?

My boiler wont go off.