Baxi Platinum Combi boiler review

In this Baxi Platinum Combi boiler review, we take a closer look at this model and compare it to others to help you decide whether it’s a good fit for your home.

The Baxi Platinum Combi comes with an EasyFill feature, high-quality brass hydraulics and extensive flue options for easy installation.

The Baxi Platinum Combi comes with an EasyFill feature, high-quality brass hydraulics and extensive flue options for easy installation. (Image credit: Baxi)

The Baxi Platinum Combi is a mid-range combi boiler that comes in four power outputs: 24kW, 28kW, 33kW and 40kW. This means there is a range of choices to power your home effectively, but we think it’s most suited to small to medium-sized homes. It’s compact enough to install in your kitchen, bathroom or airing cupboard.

Baxi is a Dutch company, but the boiler is manufactured in the UK. It is built with UK winters in mind, since the unit includes frost protection.

It’s easy enough to use, with a large LCD display. You can integrate the boiler with the Baxi uSense smart controls or any other smart thermostat for complete mobile control over your heating and hot water. You can also integrate it with systems like Tado or Hive. An EasyFill feature enables you to top up the boiler pressure if it drops without calling an engineer for help. It comes with a standard 10-year warranty as a testament to its quality.

The Baxi Platinum Combi can deliver a flow rate of up to 16.4 litres per minute, so you can enjoy hot showers all year round. If you have more than one bathroom, however, you will need to install the 40kW model or even consider an alternative boiler system (for example, a system boiler) to meet the increased demand.

Overall, the Baxi Platinum Combi boiler is well made and very affordable, engineered for optimal efficient performance and backed by awards for innovation and customer service.

Technical information

The Baxi Platinum Combi is built in the UK using high-quality brass components. It comes in a range of power outputs (24kW, 28kW, 33kW and 40kW) and provides up to 16.4 litres of hot water per minute. Its EasyFill feature makes topping up your boiler pressure quick and simple to do on your own.

With compact dimensions of 450 (w) x 780 (h) x 345 (d) mm, installing and maintaining your Baxi Platinum Combi is a breeze. This model comes with a full wall-mounting jig, a choice of flue lengths and plug-in timers, a 1 metre lead and front access to all parts. It is also compatible with the uSense smart control system.

  • Guarantee options: 10 years
  • Price range: From £1,728 to £2,228 (including installation)
  • Efficiency rating: A
  • Output rating: 24kW, 28kW, 33kW and 40kW

Key features

Highlights: Highly efficient (A-rated with 92% efficiency), solid no-quibble 10-year warranty and affordability.

Key benefit: Comparable warranty and quality to market leader, Worcester Bosch, but at a much lower price tag.

Fuel: Gas.

Flow Rate: 9.8–16.4 litres per minute (l/min)

Pros and cons 

A new boiler is an expensive investment. You need to ensure the model you choose is the best possible fit for you and your home. The Baxi Platinum Combi has lots of positive online feedback, but it’s important to weigh the pros and cons before you make a purchase.

Consider the Baxi Platinum Combi’s advantages, including:

  • Warranty: Baxi guarantees parts and labour for up to 10 years.
  • High efficiency: Baxi Platinum Combi boilers have an A rating for heating and hot water, and 92% efficiency. They also meet the efficiency requirements to be endorsed by the Energy Saving Trust.
  • National network: Baxi has a national network of Gas Safe-registered engineers that are available for same or next-day visits when you need them most.
  • Easy installation: Baxi Platinum Combi boilers come with a wall bracket that is easy to fit, saving you time and money on installation.
  • Compact size: With dimensions of 450 (w) x 780 (h) x 345 (d) mm, your Baxi Platinum can fit into a standard kitchen cupboard with ease.

There are some drawbacks to consider with this boiler, including:

  • Not suitable for low-pressure areas: Your boiler will need adequate water pressure to work effectively. If you suspect that you are in an area with low water pressure, speak to your installer about boosters.
  • Not suitable for high-demand homes: While the standard 24kW model will work well in a home with one bathroom, it isn’t suitable for larger homes with multiple bathrooms or power showers.
Baxi installers can register your boiler in minutes via an app, so you are protected from the start.

Baxi installers can register your boiler in minutes via an app, so you are protected from the start. (Image credit: Baxi)

How does the Baxi Platinum Combi boiler work?

Your Baxi Platinum Combi is designed to reduce energy waste and water inefficiency by heating water directly from the mains. Combi boilers heat water instantly when you turn on the hot tap. Unlike conventional boilers that need a hot water cylinder or water tanks, the boiler is entirely self-contained. This means it takes up far less space.

Combi boilers are best suited to homes with single bathrooms because the flow will be reduced if more than one tap is running at a time. If you have multiple bathrooms or low mains water pressure, a system boiler may be a better choice.

How does the Baxi Platinum Combi compare to other combi boilers?

If Baxi doesn’t suit your needs, you should consider the Worcester Bosch Greenstar 4000. Its best features are its sleek design, high efficiency, reliable hot water output and Quiet Mark accreditation. Note that it only comes in power outputs up to 30kW, so the Baxi has an advantage here if you have a larger home.

At 94%, this boiler has a higher efficiency rating than the Baxi Platinum Combi, but it comes with the same length guarantee (10 years). It’s also hydrogen-ready for when this fuel type becomes available, meaning it’s prepped for the future. Expect to spend from £1,200 to £2,500 on this model (excluding installation).

You may also want to explore the options available from Vaillant. The ecoTEC Green iQ 835 is Vaillant’s most eco-friendly boiler. It’s highly recyclable, A-rated for energy and operates with 94% efficiency. Its 10-year guarantee matches the Baxi (only available when installed by a qualified technician). You can expect to spend around £1,425 for the Vaillant ecoTEC Green iQ Boiler, excluding installation and sundries.

How much does a Baxi Platinum Combi boiler cost?

Costs for the Baxi Platinum Combi will vary between installers and suppliers, so take some time to compare before making a final decision. According to online estimates, you can expect to spend the following:

Baxi Platinum Combi boiler cost
Boiler unit only (including VAT) £928
Average installation cost (including VAT) From £500 to £1,000
Sundries (filters, flues) £300
Total cost From £1,728 to £2,228

Maintaining your Baxi Platinum Combi boiler

It’s a good idea to use the warmer summer months to maintain your Baxi Platinum Combi boiler. Firstly, book an annual service. If your boiler is still under warranty, you need to do this to keep your guarantee valid. During the service, the engineer will perform a safety check and thorough examination of your boiler components.

Secondly, try to keep the room thermostat and hot water down in the summer months to reduce wear and tear. You should also check and bleed your radiators once a year.

Baxi works with Domestic & General to offer maintenance and support plans that keep your boiler running. The Basic service and system plan is available in-warranty for only £12.40 per month, while the Gold and Platinum plans will cover you outside your warranty for £20.35 and £22.50 per month respectively. Each plan includes access to the Baxi Boiler Care portal, an annual service, and tips and tricks to keep your boiler in good condition.

What the professionals say

“The Baxi Platinum Combi Boiler is a well-designed and affordable boiler that is perfect for homes with up to two bathrooms. It has been engineered with low volume and optimised and efficient performance in mind. Baxi has won awards for its boiler design innovation and customer service and has developed a reputation for reliability and great value.”

“Reliable and easy to install, the Baxi Platinum Combi is a firm favourite with householders and installers alike. Baxi Platinum Combis are ideal for homes across the country since they are easy to install and run reliably for years into the future.

The Baxi Platinum Combi is highly efficient with a SEDBUK (2005) Band A rating for energy efficiency. Not only does this reduce your carbon emissions but it also has the potential to lower your energy bills.”

“In the past, I’ve come across a few clients who were looking for a 10-year guarantee, but felt Worcester Bosch was too expensive – which is why I started recommending the platinum range of Baxi combis to them. Let me tell you why: The Baxi platinum range typically works out cheaper than the Worcester Bosch equivalent by a few hundred pounds, when supplied and fitted with controls and filter. Plus, they have a little extra output to the hot water which equates to around an extra 1/2 litre per minute (on the 33kW & 40kW models).”

Customer reviews

“Great boiler. Never had such hot water through taps or in shower. Only used radiators for a few days because of the weather but I’m very happy with the heat they provide.”

“The swift efficient installation to remove two old boilers and combine the two heating systems together with a smart new combi boiler. Hot water on demand now … and pressure to have a great shower.”

“Smart looking boiler, easy to understand & use. Excellent performance & great value for money.”

Final recommendation

The Baxi Platinum Combi boiler proves that a lower price doesn’t necessarily compromise quality. If you have a small property with fewer than five radiators, the Baxi Platinum 24kW will be perfect for you, while the 33kW and 40kW models will be ideal for larger flats or detached homes with three to four bedrooms and nine to 14 radiators.

Many professional installers compare the Baxi Platinum Combi to Worcester Bosch combi boilers in terms of warranty, quality and performance, but the Baxi comes at a much lower price. We also like its frost protection feature and optional smart controls for even greater efficiency.

Overall, the Baxi Platinum Combi boiler is perfect for small to medium-sized homes looking for a high-performance boiler on a budget. The generous warranty and Baxi’s good reputation make it a good option for homeowners with limited funds that don’t want to take a risk on an unknown brand.

Our methodology

To compile our Baxi Platinum Combi boiler review, we consulted hundreds of online customer reviews. We also analysed professional reviews and forums, opinion pieces by the media and technical documentation, including manuals and brochures. We then rated the Baxi Platinum Combi against our 100-point scoring system. Our scoring system is made up of the following:

  • The warranty period offered by the brand, for a total of 10 points;
  • The overall reputation of the brand based on online reviews, for a total of 15 points;
  • Trustpilot reviews, for a total of five points;
  • Awards and accolades (eg, Which? Best Buy Awards), for a total of five points;
  • Customer service performance, for a total of 10 points;
  • The price range, for a total of 15 points;
  • Efficiency ratings, for a total of 15 points;
  • Installation and maintenance network and reviews, for a total of 15 points; and
  • Overall performance (temperature, maximum flow), for a total of 10 points.