Are you thinking of investing in the Worcester Bosch Greenstar 30i combi boiler?

Perhaps you’ve already heard it’s a bestselling boiler. In actual fact, it’s almost certainly the most popular boiler on the market right now. As an accredited Worcester Bosch installer, it’s one of the most common boilers I sell to customers – with good reason.

Below, I’m going to explain what makes it such a popular choice for homeowners across the UK. I’m also going to provide some details to help you decide if it might be right for your home!

So, without further ado…

What makes the Greenstar 30i the most popular boiler sold today?

The Worcester Bosch Greenstar 30i is such a popular choice, because its heating and hot water outputs happen to be just perfect for heating the typical-sized 2 – 3 bedroom family home. That’s 24kW to the heating, and 30kW to your taps – providing a good flow rate of 12.3 litres per minute. It’s just right for running a bath or a high pressure shower, which is what most people are looking for these days.

Combine those outputs with the fact that Worcester Bosch is the current market leader, selling more boilers than any other brand in the UK, and you’re onto a winner. After all, Worcester Bosch has been voted Which? ‘Best Buy’ for around 7 years running now. And that’s voted by homeowners and engineers alike!

It also comes with a comprehensive 8-year no-quibble guarantee when you fit the brand’s own magnetic central heating filter.

A closer look at the Worcester Bosch Greenstar 30i

Let’s get technical. 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)
  • Size: 400mm x 700mm x 330mm (wall-hung)
  • ERP rating: A

Advice from an experienced Worcester Bosch accredited engineer

Thinking of investing in the Greenstar 30i? It’s a great choice, and you wouldn’t be the first to think this is the best choice for your home! However, before you buy, speak to a Worcester Bosch accredited engineer. They’ll be able to measure your home’s heat loss and water demand, so you can be 100% sure you’re getting the right boiler for your home.

The best thing about going to a Worcester Bosch accredited installer is that they’ll have the most knowledge and expertise. They should be happy to answer your questions, and even give you some great advice and tips!

Check out my blog ‘5 Benefits of Hiring a Worcester Bosch accredited installer’ to learn more.


Looking into the Worcester Bosch Greenstar 30i? Heard it’s a bestselling boiler? Well, this blog explains why that is, and why it might be the right choice for your home. ‘Might’ being the operative word. Always speak to a Worcester Bosch accredited engineer first, who will be able to properly measure your home’s heat loss and water demand, so you can be 100% sure it’s the right choice for you.

Got any more specific questions about the Worcester Bosch 30i? Let me know in the comments’ section. I’ll be happy to help!