Baxi Boiler Review 2026 - Everything You Need to Know

If you're thinking about upgrading your boiler, you might be wondering which brand is the best choice. Or maybe you've already done some research and Baxi has come up. Either way, you're in the right place.

With over 20 years of experience installing boilers across Derbyshire and Nottinghamshire, and as Baxi Approved installers, we know these boilers inside out. Baxi is the brand we install most and the one we recommend most to our customers. In this guide we'll tell you honestly what you need to know before you decide.

What Is Baxi?

Baxi has been manufacturing boilers in the UK since 1866 - that's over 150 years of heating experience from one of the country's most established brands.

They're one of the most recognised and trusted boiler brands in the UK, known for being reliable, efficient and good value across all home types and budgets. Baxi boilers are installed in homes right across the country and remain one of the most widely fitted brands by heating engineers today.

Why So Many Homeowners Choose Baxi

Baxi sits in a strong position in the UK boiler market. They're not the cheapest brand but they're also not the most expensive - and what you get for the price is genuinely good.

Baxi is also the boiler brand we install most at KAS Energy. As Baxi Approved installers, it's the brand we trust and recommend most to homeowners across Derbyshire and Nottinghamshire - and our customers consistently choose it.

Here's what makes Baxi a popular choice:

• Over 150 years of UK manufacturing - one of the most widely installed boiler brands in the country, trusted by homeowners across the UK for generations
• A-rated energy efficiency - almost all the gas your boiler uses is converted into heat rather than wasted, which means lower energy bills compared to an older boiler
• Stainless steel heat exchanger on the 800 and 900 series - built to last longer and resist wear, which means fewer faults and a more reliable boiler over the years
• Adey Micro2 magnetic filter included on the 800 series - over time, heating systems build up sludge and debris that can cause breakdowns. This filter catches it before it reaches the boiler, which means it stays cleaner, runs better and is less likely to go wrong
• Warranties up to 10 years - if something goes wrong within that time it is covered, which means no unexpected repair bills
• Compact design - fits neatly into standard kitchen cupboards
• Wide range of models - gas, LPG and electric options across combi, system and regular boiler types, suitable for all home sizes and setups

The Baxi Range - Which Model Is Right for Your Home?

Baxi offer four main gas boiler series in 2026. Here is a simple breakdown:

Baxi 400 Series

The entry level option. Comes with a 5 to 7 year warranty depending on the model. A solid, reliable choice for smaller homes and budgets.

Baxi 600 Series

The most popular choice for three bedroom homes. Good efficiency, 7 year warranty and built with high quality brass components. Well regarded for its reliability and value.

Baxi 800 Series

The standout model in the Baxi range. UK built with brass fittings, comes with an Adey Micro2 magnetic filter included as standard and carries a 10 year warranty. This is the model most commonly recommended for medium to larger homes. Excellent value for the specification you get.

Baxi 900 Series

The premium option. 10 year warranty as standard, stainless steel heat exchanger and the highest output in the range. Worth considering for larger homes or if you want the longest warranty coverage.

What Does Being a Baxi Approved Installer Mean?

Not every engineer can offer the full Baxi warranty.

KAS Energy are Baxi Approved installers, which means our engineers have completed Baxi's manufacturer-led training and meet their standards for installation quality. This matters for two reasons:

First, it means your boiler is installed correctly, safely and to the highest standards - which directly affects how well it performs and how long it lasts.

Second, as Baxi Approved installers we can offer extended warranties of up to 10 years on selected Baxi boilers. That is significant peace of mind that you would not get from a non-approved engineer.

We've installed hundreds of Baxi boilers across Derbyshire and Nottinghamshire and they're the brand we trust most for the homeowners we work with. If you're weighing up a new boiler, or looking specifically at boiler installation in Nottingham or boiler installation in Derby, a Baxi is almost always in the conversation.

Is a Baxi Boiler Worth It?

For most homes across Derbyshire and Nottinghamshire, yes.

Baxi is one of the most widely installed boiler brands in the UK for good reason. Compared to a lot of other brands, it offers genuinely good value - reliable, A-rated for efficiency and backed by warranties of up to 10 years, all at a price point that works for most budgets.

It's a popular choice amongst our customers at KAS Energy and one we're confident recommending - having installed hundreds of them across Derbyshire and Nottinghamshire over the past 20 years. And if something ever does go wrong down the line, our team also handle boiler repairs across the region.

Thinking About a New Baxi Boiler?

As Baxi Approved installers with over 20 years of experience across Derbyshire and Nottinghamshire, we can supply and fit the right Baxi boiler for your home - and back it with a warranty of up to 10 years.

It starts with a free home survey. No pressure, no obligation - just honest advice from engineers who know Baxi boilers inside out.

Call 01773 424563 or use the contact form below.