The smarter way to replace your boiler

  • Get FREE Quotes today
  • Compare quotes & save money
  • Over 5,000 engineers across the UK
Tell us about your job
Get Free Quotes

The Top 4 Combi Boiler Brands to Buy and Install in 2021

Looking for a new combination boiler but not sure which one to buy? Read on to discover which combi boiler brands have been ranked the best to purchase right now.

Buying and installing a boiler can be costly, so it’s important to choose a reliable boiler brand and upgrade to an energy-efficient model that can help you reduce your energy bills. If you select the wrong size combi and get an unreliable boiler installed, chances are the boiler will breakdown regularly and you’ll need to fork out for expensive repairs. But how can you tell which combi boiler brand is the best choice for your property?

To help you decide, we’ve written a guide that reveals our top 4 combi boiler brands to buy in 2020.

Get FREE Compare Boiler Quotes

  • Get FREE Quotes today
  • Compare Best Prices
  • You will be contacted by 3 Local Boiler Engineers
Get Free Quotes

1.Worcester Bosch

Known for being one of the most trusted boiler brands in the UK, Worcester Bosch has an excellent reputation for manufacturing reliable and highly efficient boilers that are built to last. We’ve lost count of the number of times Worcester Bosch has won Which? Best Buy Awards over the years, even though it’s often considered one of the more expensive manufacturers. The brand has even been awarded the Royal Warrant for supplying boilers
to Her Majesty The Queen’s Sandringham Estate.

Ask any owner or engineer what they think of Worcester Bosch and most will tell you it’s the market leader when it comes to the performance and longevity of its boilers. Best of all, the brand offers an impressive range of award-winning combi boilers of all outputs, giving you plenty of options to choose from.

The Greenstar CDi Compact is one of Worcester Bosch’s best-selling combi boilers as it’s suitable for any size home and has the following key features and benefits:

  • Available in heating outputs of 28kW, 32kW and 36kW
  • Fits in a kitchen cupboard
  • Suitable for homes with two bathrooms
  • Has a flow rate of up to 12.9 litres per minute
  • Instant hot water always available
  • ErP A-rated for hot water and heating efficiency
  • Compatible with a smart internet-connected Bosch EasyControl
  • Up to 10-year guarantee when installed by Worcester Accredited Installer

Prices start at £973.44 for the Greenstar CDi Compact Combi but we recommend you browse the full range of Worcester Bosch combi boilers to determine which is best for you.


Designed in Germany, Vaillant boilers are known for their efficiency, reliability and build quality, so it comes as no surprise that this brand is so high on our list. But it’s not just us who think Vaillant is up there with the best. Not only are Vaillant combi boilers a firm favourite among British homeowners but heating engineers across the UK love them too.

Vaillant’s most popular product line is the ecoTEC range, with the ecoTEC Plus Combi being the brand’s flagship boiler. It’s the perfect combination boiler for almost any home and it can even help to lower your fuel bills.

The key features and benefits of the Vaillant ecoTEC Plus Combi include:

  • Available in heating outputs of 25kW, 32kW, 35kW and 38kW
  • Can deliver hot water within 5 seconds
  • Has a flow rate of up to 15.9 litres per minute
  • ErP A-rated for hot water and heating efficiency
  • Compatible with Vaillant vSMART heating control and smartphone app
  • 5-year warranty as standard
  • Warranty can be upgraded to 7 or 10 years

If the ecoTEC Plus Combi by Vaillant sounds like the right boiler for your home and needs, you can expect to pay between £1,110 and £1,500 to get one installed.


Just like Worcester Bosch and Vaillant, Viessmann has picked up many awards over the years for manufacturing extremely reliable boilers that also happen to be among the most efficient on the market. Viessmann boilers are German engineered and renowned for longevity and innovative technology, plus they offer good value for money and cater to a wide variety of homeowners in the UK and across the globe.

Choosing the right Viessmann combi boiler will, without a doubt, reduce your energy bills and give you hassle-free control over your heating and hot water. The brand offers a wide range of combi boilers but, like we always say, you need to consider the size of your home and kW output requirements to establish which option will meet your needs.

The Viessmann Vitodens 200-W is one of the best combi boilers available at the moment, and here’s why:

  • Available in heating outputs of 26kW, 30kW and 35kW
  • Quiet operation thanks to low fan speed
  • 7-inch colour touchscreen for ease of operation
  • Integrated WiFi interface for internet connection
  • Compatible with solar thermal system
  • ErP A-rated for hot water and heating efficiency
  • 3-year warranty as standard
  • Warranty can be upgraded to 5 or 10 years

To purchase the Vitodens 200-W Combi, you’re looking at paying anything from £1,150 to £1,300.


British boiler manufacturer, Ideal, is currently one of the country’s leading boiler brands and takes pride in selling thousands of products in the UK each year. Every combi boiler in Ideal’s range is designed to help its owner adopt an energy-efficient lifestyle, as well as play its part in reducing heating bills. As a brand that’s dedicated to offering A-rated boilers that maximize efficiency in the home, it’s easy to see why Ideal is such a popular choice with
homeowners. By offering reliable boilers at an affordable price, Ideal knows what customers really want
and what they expect from a reputable boiler brand. And you don’t just have to take our word for it. Ideal scored 5 out of 5 stars for reliability according to a Which? survey and has received Good Housekeeping Magazine’s Reader Recommended status on three occasions.

Since the Logic+ Combi is the brand’s flagship product, we’re going to take a closer look at what makes it so great:

  • Available in heating outputs of 24kW, 30kW and 35kW
  • Fits in a kitchen cupboard
  • Has a flow rate of up to 14.5 litres per minute
  • Quiet Mark approved Fully back-lit LCD display for ease of operation
  • Compatible with optional weather compensation and OpenTherm control
  • ErP A-rated for hot water and heating efficiency
  • 7-year warranty as standard
  • 10-year warranty on heat exchanger

Compact in size and boasting unrivalled levels of reliability, the Ideal Logic+ Combi will set you back anything between £880 and £1,010.

If you’re interested in any of the combi boilers we’ve mentioned on this page or you want
to know more about the complete range of combi boilers from each brand, just browse
our website for more info and prices.

Get FREE Compare Boiler Quotes

  • Get FREE Quotes today
  • Compare Best Prices
  • You will be contacted by 3 Local Boiler Engineers
Get Free Quotes