Big fat boiler you say? Here's a 40kW recommendation to stuff your face with.
Combi boilers are one of the most common boilers in UK households, due to their convenience and efficiency.
They provide homes with central heating as well as domestic hot water from a single unit.
Combi boilers with a power output of 40kW are considered to have a high power output and these are typically suitable for homes with a higher than average demand for heating.
However, if you have more than one bathroom and a large family, you probably have an above-average demand for hot water, in which case you may want to consider a system or regular boiler instead.
You can read our complete guide on choosing a boiler for a larger home here.
However, if you are certain a 40kW combi is right for you, keep reading to learn about some of the best models available.
PS we fit new combi boilers with gas safe installation nationwide. Simply answer these questions, get your fixed price and you could get it installed as quick as tomorrow.
Best 40kw Combi Boilers
Combi boilers are compact heating systems that do not have a hot water cylinder or a cold water tank.
The boiler is directly connected to the mains water supply and instantly heats the water when required.
However, as combi boilers do not store hot water, they are not the most convenient when you want to run two or more baths or showers at the same time.
In fact, they can struggle to maintain adequate hot water flow and pressure to two outlets simultaneously.
Hence, combi boilers are not suitable for houses with a high hot water demand but are perfect for medium-sized houses with moderately hot water usage.
What Does 40kW mean?
A 40kW combi boiler is a high-output boiler that can meet the demands of larger homes with two bathrooms.
The output rating of a boiler is a measure of its power. System and regular boilers have only central heating (CH) output rating as the hot water is stored in a separate hot water cylinder.
However, combi boilers have a CH rating as well as a domestic hot water rating (DHW). The DHW rating depends on how efficiently and quickly water is heated.
A combi boiler with a 40kW (DHW) output signifies that the boiler is powerful enough to heat 15-20 radiators.
The output rating is thus significant for energy consumption and proper heating.
A boiler with a very high output will consume a lot of energy and thus the heating bill will rise sky-high.
But, a boiler with a low output will not be efficient enough to meet your heating or hot water requirement.
So, if you think a 40kW combi boiler is for you, here are our top suggestions.
Best 40kW Combi Boilers (Models)
Here are our top 5 best 40kw boiler suggestions that will suit most 2+ bathroom homes.
1. Viessmann Vitodens 200-W 40kW Combi Boiler
Meeting every demand a boiler buyer could possibly have of their combi boiler.
The Vitodens 200-W is perfectly suited for larger detached and semi-detached homes.
It holds every feature and perk of Viessmann boilers before it whilst also boasting a colour touch screen display, smart thermostat compatibility and up to an incredible 98% efficiency rating.
Ideal for: Those looking for the top-of-the-range combi boiler from the award-winning German brand.
Some of its main features are:
Class 'A' for energy efficiency
10-year comprehensive warranty as standard - when purchased with Heatable
94% efficiency
Hydrogen-ready for the next generation of fuel
Weather compensation option for Boiler Plus compliance
Backlit LCD touchscreen display
Stainless steel heat exchanger
Compatibility with the Viessmann Vitronic smart thermostat - that sounds fancy
2. Worcester Bosch Greenstar 8000 Style/Life 40kW Combi Boiler
Launched in 1962, Worcester Bosch is one of the leading boiler brands in the UK.
Their Greenstar 8000 life range includes life boilers (30kw-50kw) and style boilers (30kw-50kW) and is among the most premium models on the market.
Worcester's 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.
As its name suggests, it is also arguably the best-looking boiler on the market and readily available in black - a boiler industry innovation on par with the introduction of the iPod.
Ideal for: Those looking for a top-of-the-range boiler, with all of the latest and greatest features.
They have wireless connectivity and come with a 12-year guarantee from Worcester Bosch.
Some of its main features are:
High A-rated efficiency
Compatible with Bosch’s EasyControl, allowing you to control the heating and hot water requirements from your smartphone
1:10 modulation increases efficiency
Equipped with Greenstar Intelligent filling system, it can top up its own pressure
Low noise levels
3. Baxi 800 Platinum Plus 40kW Combi Boiler
Baxi is a well-known and respected boiler manufacturing brand and is a preferred choice of most installers.
It is one of the best boilers in terms of its quality of energy efficiency.
The Baxi boiler also fulfils your heating requirements while lowering your energy bills.
The boiler has an ErP A rating and a built-in frost thermostat that protects against freezing during the chilly winter months.
Recommended by Energy Saving Trust, the boiler has a compact size and can be fitted in a standard cupboard.
Some of its key features are:
OpenTherm technology allows you to control the boiler from anywhere using your smartphone or tablet
A flow rate of 16.4 litres/minute at a 35°C temperature rise, making it ideal for large properties with multiple bathrooms
Fully compatible with IFOS and OWOS weather sensors
Can be installed with a multi-fit flue system, allowing easy and flexible installation
Standard 10-year warranty
4. Ideal Vogue Max 40kW combi boiler
The brand is known for making premium products, and the Vogue Max model is no exception.
Made from the best quality components, this model is also easy to install and service. It is equipped with an Ideal System Filter that makes the model easy to use and efficient.
Apart from the 40kW variant, the boiler also comes in outputs of 26 kW and 32kw that are best suited for smaller homes.
The boiler not only has an easy-to-read pressure gauge but also a low lift weight, which makes installation quick.
The boiler includes frost protection that ensures efficient working in cold months. It also comes with a 10/12 year warranty (12-year warranty when installed by an Ideal Max certified installer).
Here are some of its notable features:
Stylish composite design
Full-text support for fault modes
ErP compliant
Compatible with Ideal controls
5. ATAG i40C Combi Boiler
ATAG prides itself on making high-performance, compact, and intelligent boilers. The 140C boiler is lightweight and easy to install and comes equipped with simple controls.
It even has a separate hot water thermostat for increased safety. The ATAG iC range includes i24C, i28C, i36C, and i40C boilers.
The boiler has an energy efficiency rating of 94% and comes with a wall-fixing jig that makes installation easy and quick.
The iC range is completely compatible with the Tado V3+ Smart or ATAG ONE Zone controller. And when used with the ATAG ONE Zone controller, it achieves an efficiency rating of A+.
It also has a built-in weather compensator and frost protection device. The boiler has a 10-year warranty that can be extended up to 14 years.
Take a look at some of its main features:
The iCON stainless steel heat exchanger has a lifetime exchange warranty
Compliant with Boiler Plus
Less noisy
LCD display that details fault codes for quick and precise boiler diagnostics
Best 40kW Combi Boilers FAQs:
What Are The Main Factors To Consider When Buying A 40kW Combi Boiler?
When deciding on the output of your boiler, you need to consider the size of your property, the number of bedrooms, and the number of bathrooms.
As a 40kW combi boiler can power up 20 radiators, it is ideally suited for people with large properties and high hot water requirements.
What Type Of Houses Are 40kW Combi Boilers Best Suited For?
If you have a large house with a lot of hot water needs, a 40kW combi boilers can be your best choice.
A 40kW Combi Boiler can power up 20 radiators in a home and are thus excellent for properties with 3-4 bedrooms/ 2-3 bathrooms.
What Is The Cost Of 40kW Combi Boilers?
Combi boilers are relatively cheap as they are compact and do not have many parts.
As there are no additional parts like cylinders, the cost of combi boilers is greatly reduced. You can get a 40kW combi boiler for as low as £1,200.
However, you need to consider the additional cost of installation as it may increase the overall budget.
The installation charges depend on the type of boiler, the complexity of the installation, and even where you live (Londoners, be prepared to pay higher).
To get the best deals, compare quotes from different installers before making your decision.
Best 40kW Combi Boilers Conclusion
Combi boilers are modern solutions to space-consuming older models.
But, they are unable to meet high hot water demands as they do not have stored up hot water.
Thankfully, we now have new combi boiler models with high output rates.
The 40kW combi boilers can meet high hot water demands and are compatible with homes with 2 bathrooms.
If you too are impressed and want one installed in your home, we hope our recommendations for the best 40kW combi boilers help you find the right boiler for your home.
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