The Top Combi Boilers of 2020


When you need to decide which boiler to buy, the decision can be made a bit easier with the right guidance. Do you need to replace your combi boiler this year? This guide will detail the top brands of combi boilers in 2020, to help you decide which boiler is right for you. There are many different combi boiler brands, which cater to different homes and budgets. First, we will explain what a combi boiler actually is. 

What is a Combi Boiler? 

A combi, or combination boiler is a unified way of supplying heating and hot water without the need for two separate boilers. A combi boiler combines water heating and central heating into a single system.

Combi boilers heat water directly from the mains when you turn on the hot water tap, so there is no need for a hot water storage cylinder or a cold water storage tank in the loft space. The lack of necessity for a separate water storage tank means the combi boiler takes up less space in your home.

The combi boiler is known for its reliability and efficiency, which makes it the most popular type of boiler in the UK! 

Why Should I Choose a Combi Boiler? 

There are many reasons that you should choose a combi boiler for your home. Here are the top 6 reasons why we think you should get a combi boiler.

1. More Efficent

A combi boiler is the right choice for you if you are looking for a boiler that is more eco-friendly and fuel-efficient. If you replace your old boiler with a combi boiler, you could even save up to £300 a year on your heating bills.

2. Cheaper to Install

Combi boilers are also cheaper to install as they are way less complex than traditional heating systems. It is also easier to find replacement parts for a combi boiler if necessary. 

3. Safer Water

You should choose a combi boiler for its safety. The cold water from a combi boiler is safe to drink as it comes directly from the mains. Traditional systems don’t always have this benefit, as they may store cold water in a tank before it is supplied to the rest of the house. 

4. Less Enegry Waste

As the combi boiler heats water on demand, it does not waste energy by heating a separate water tank system. This means that the combi boiler is also faster to run and supply hot water.

5. They Suffer Less Issues

Combi boilers are also less likely to suffer from pressure issues, as the hot water is supplied directly from the water mains. And they are easy to service, as their popularity means the majority of heating engineers have been trained on how to repair and service them.

6. Compact Size

If you are trying to sell or rent out your property, you can use the popularity and efficiency of your combi boiler as a unique selling point. A combi boiler is also ideal if you are looking for a boiler that takes up less space. The combi boiler is the best choice for smaller homes and flats due to its smaller size. 

The Top Brands of Combi Boiler 

With there being so many different brands out there, you should do your research. We have complied the four top combi boiler brands of 2020.

Worcester Bosch 

Worcester Bosch is a pioneering brand of combi boilers. The brand secured a Which? Best Buy award for the 10th year in 2019. The Greenstar i, the brand’s bestseller, can be found in more than a million UK homes.

The Greenstar i is most suited to small or medium sized homes, and is simple to control. Its low energy pump reduces electrical usage and the boiler achieves A-Rated efficiency. It fills a kitchen sink in 45 seconds, providing hot water that can be instantly heated from cold mains. The Greenstar i comes with up to a ten year guarantee. So you can be sure that the investment in your boiler will be safe. 


Vaillant is a premium brand which is also a Which? Best Buy award winner. They offer a 5 star boiler range for properties of any size. However, the brand is on the more expensive side so it’s not right for you if you are on a tight budget. 

The brand’s ecoTEC exclusive boiler is ideal for larger homes which may have higher outputs. The boiler can generate 17.8 litres of hot water per minute and is eco-friendly and 85% recyclable.

The ecoTEC exclusive has been Quiet Mark approved. Along with all of the Vaillant boilers, meaning it is one of the quietest products on the market. 

Conveniently, the brand’s boilers come with an app which allows you to control your heating anytime. Their boilers come with a 5 year warranty which can be upgraded every 7-10 years. 


Viessmann is possibly the best combi boiler brand in the market right now. Their advanced heating systems, made with German engineering, are incredible value for money. The Vitodens 050-W 29kW is the most reliable boiler in their range, with its compact dimensions, low weight, and stainless steel heat exchanger.

This boiler comes with a useful ten year warranty. It also has a water flow rate of 12 litres per minute. The Vitodens boiler is A-Rated for its energy efficiency and won the Which? Best Buy award in 2019. 


The Ideal brand is suitable for all customers with different budgets. It has both affordable and premium models of boilers. Their Logic boilers are reliable and award-winning. They won the The Queens Award in 2013 as well as The Good Housekeeping Award in 2013 and 2017.

This boiler is compact and easy to control, with a large digital display and an easily accessible pressure gauge. An Ideal boiler comes with a 2 year warranty that can be extended to 5 years. 

To Conclude: The Top Combi Boilers of 2020 

This guide to the top combi boilers of 2020 should make it easier for you to decide which combi boiler is right for you. Factors to consider when deciding on your combi boiler include your budget and your heating needs for your home. The combi boiler is the most popular heating solution in the UK for its reliability and efficiency when it comes to fuel and cost.

If you need more information about combi boilers or have any questions , please give Greener Homescall and we will be happy to help you!