What are the best combi boilers to buy?

The best combi boilers to buy are Worcester Bosch, Viessmann, Vaillant, Alpha and Baxi. Know more about these boilers on this page.


Worcester Bosch Combi Boiler Reviews – (Best)

best combi boilers to buy

One of the UK’s most well-known and trusted boiler manufacturers, Worcester-Bosch remains a favourite among professional Boiler installers and heating engineers.

Why did Let’s Heat think Worcester-Bosch deserved the number one spot?

  • Which? Best Buy Award for 10-years running
  • 10-year guarantee
  • Availability of parts is second to none
  • Excellent customer reviews & aftercare
  • High-efficiency A-rated combi boilers

Model: Worcester Bosch Greenstar i Review

The Worcester-Bosch Greenstar i is officially Worcester’s best selling combi boiler range having sold and installed more than 1 million of them in the UK alone.

Suitable for small to medium sized homes on a budget the Greenstar i is the brand’s entry level offering and the range includes the 30i i.e. 30kW and the less powerful Greenstar 25i at 25kW.

Although not the brand’s best offering, it still boasts some great features, not least of which is an A-rating for efficiency, a user-friendly digital display and a reassuring ‘Which?’ Best Buy Award.

Model: Greenstar CDi Compact Boiler Review

Worcester Bosch Greenstar CDi Compact Boiler

The CDi Compact is Worcester Bosch’s compact boiler, designed to be the ideal size to fit into small spaces, such as kitchen cupboards.

Available with multiple power outputs including 28kW, 32kW and 36kW, this combi boiler can still provide heating and hot water for properties with varying demands but offers the dimensions required to save as much space as possible.

Model: Worcester Bosch 2000 Reviews

The Worcester-Bosch 2000 is the brand’s latest entry-level offering and officially the brands quietest ever boiler.

Its compact design makes it suitable for installation within small spaces such as kitchen cupboards and is available within 25kW or 30kW it has enough power for flats and small homes.

Boasting A-rating efficiency, a user-friendly digital display and a reassuring Which? Best Buy Award and a contemporary and stylish case, it’s a superb option for small property dwellers on a budget.

Model: Worcester Bosch 8000 Style Review

The Worcester-Bosch 8000 offers the same contemporary design and feel as it’s a cheaper brother, the 2000 but with cutting edge features and superior power outputs, it is ideal for larger homes with more than one bathroom.

It’s the most powerful and connected wall-hung boiler to date, capable of delivering up to 50kW’s, and with optional smart technology that will top up the boiler for you when low pressure is detected.

Want a quote for a Worcester-Bosch Boiler & Installation?

With us here at Let’s Heat you can get an online quote now to see how much we can install it for: Get Quote Now!

And please remember that whoever you use to install your boiler, please ensure that they are gas safe registered, as we are and that they have a great review score for their workmanship see our 4.9 Trustpilot ratings here!

Viessmann Combi Boiler Reviews – (2nd Best Condensing boilers)

viessmann boilers

Dominating the European boiler market, Viessmann is a relatively new entrant to the UK market, but thanks to their prestigious German engineering, reliability and superb customer support they have seen huge growth and popularity within a very short period of time.

Major benefits of Viessmann boilers include:

  • Technically brilliant boilers e.g. they use stainless steel heat exchangers
  • 10-year guarantee
  • Excellent customer reviews and aftercare
  • High-efficiency A-rated combi boilers

Model: Viessmann Vitodens 050-W Gas Combi Boiler Reviews