If you live in a medium or large-sized home with up to two bathrooms and are looking for a new combination boiler, a 40kW combi boiler could be a perfect choice.
Finding a boiler that’s perfect for your home is crucial, and a combi boiler could be a great option if you’re looking for a space-saving solution. In addition to selecting the correct boiler type, you need to pick the right boiler size to meet the demands of your home. But with so many options to choose from, it can be hard to know where to start.
In this article, we’re going to focus on 40kW combi boilers to help you determine whether one can meet your current and future needs.
What is a combi boiler?
A combi or combination boiler provides heating and hot water from one compact unit, hence its name. It takes water directly from the mains water supply and sends hot water to the taps and radiators within your home.
Unlike a system boiler or regular boiler, a combi boiler doesn’t require a separate cylinder to store hot water. That means you never have to worry about running out of hot water with a combi boiler. However, combi boilers can only provide maximum pressure through one tap at a time and struggle to supply two hot water outlets at once, for example, a shower and a hot tap.
That said, a combi boiler with a high flow rate and high output, such as 40kW, can match the demand for hot water in homes with two bathrooms.
Is a 40kW combi boiler suitable for my home?
Although most experts recommend a system boiler for properties with multiple bathrooms, a decent 40kW combi boiler should meet your hot water demands if you have two bathrooms. It will also be powerful enough to heat between 15 and 20 radiators.
You need to understand that a combi boiler has two outputs, one for heating and another for domestic hot water. System and regular boilers store hot water in a separate cylinder and only have a central heating output rating.
When we talk about 40kW combi boilers, we’re referring to the output rating for domestic hot water. You must select the correct size boiler for your home. Otherwise, it won’t meet your demands or will end up producing more energy than you need and increase your bills.
If you want to know for sure whether a 40kW combi boiler is suitable for your home, you can ask a trusted Gas Safe registered engineer for an unbiased opinion.
40kW combi boilers you can buy right now
Like we said above, it’s always a good idea to ask a Gas Safe registered engineer what size boiler they believe best fits your needs. If an engineer has already recommended a 40kW combi boiler for your home, you’re probably wondering which brand to choose.
We’re now going to look at some of the 40kW combi boilers available on the market right now.
Worcester Bosch Greenstar 8000 Life Combi
Worcester Bosch’s Greenstar 8000 Life Combi is available in various outputs, including 40kW. This powerful wall hung combi boiler can run on a 20% hydrogen blend and is ideal for homes with more than one bathroom. It features a modern design and push-button controls, plus you’ll get up to a 12-year warranty when installed by a Worcester Accredited Installer.
Other benefits and features include:
- One of Worcester Bosch’s quietest boilers to date
- Compatible with the wireless Bosch EasyControl that connects to your smartphone and allows you to control your heating and hot water from anywhere.
- Optional Intelligent Filling System – removes the need to manually top up the boiler pressure.
Worcester Bosch Greenstar 8000 Style Combi
Another fantastic 40kW combi boiler from Worcester Bosch is the Greenstar 8000 Style Combi, which has mostly the same features as the Life Combi. The main difference between the two is that this one is available in a choice of high gloss black or white to suit your home. It also has an easy-to-use full-colour display, and Worcester Bosch is offering up to a 12 years warranty on this boiler.
Other benefits and features include:
- One of Worcester Bosch’s quietest boilers to date
- Compatible with the wireless Bosch EasyControl that connects to your smartphone and allows you to control your heating and hot water from anywhere.
- Optional Intelligent Filling System – removes the need to manually top up the boiler pressure.
Baxi Duo-tec Combi
Built in the UK using top quality brass components, the Baxi Duo-tec Combi 40kW boiler is a reliable and affordable unit with a flow rate of 16.4 litres per minute. It has become one of Baxi’s most popular boilers because it’s easy to install, maintain and operate.
Other benefits and features include:
- User-friendly controls and easy-to-read display
- Built-in frost thermostat
- Compatible with the uSense smart control that lets you take control of your heating and hot water from anywhere via an app on your phone.
- 7-year warranty
Potterton Promax Ultra Combi
The Potterton Promax Ultra Combi 40kW boiler is natural gas and LPG ready, meaning it suits both fuel types and doesn’t require a conversion kit. It delivers a high domestic hot water flow rate for larger homes and comes complete with a service due indicator that reminds you when to call an engineer to service your boiler.
Other benefits and features include:
- Front access to all components – saves your engineer time when servicing
- Flueing options of up to 20m – allows greater flexibility of siting
- Compatible with an outdoor weather sensor that enhances your comfort and system control.
Vokera Vision Plus C
Although the Vokera Vision Plus C Combi 40kW boiler runs on natural gas, it can convert to LPG with an optional kit. It comes with a 7-year warranty as standard and features an LCD display and easy-to-use interface. This combi boiler is a fantastic budget-friendly option from one of the UK’s most popular boiler brands.
Other benefits and features include:
- Delivers a domestic hot water flow rate of 16.4 l/m
- A wide modulation ratio of 1:8 – can provide a minimum of 4.9kW for heating
- Embedded 7-day time clock
- New radical stainless steel heat exchanger
Ideal Vogue Max Combi
Constructed with high-quality components, the Vogue Max Combi 40kW boiler from Ideal is a serious contender if you want a reasonably priced boiler. This stylish combi boiler is easy to use, can run safely on a 20% hydrogen blend, and comes with a 10-year parts and labour warranty as standard.
Other benefits and features include:
- 3.5-inch colour backlit LCD display with graphics and plain text
- Built-in frost protection
- Complete with an Ideal System Filter
- Compatible with Ideal controls
- The warranty can be extended to 12 years when installed and serviced by a Max accredited installer
How much do these 40kW combi boilers cost?
The table below shows you how much you can expect to spend if you decide to purchase one of the 40kW combi boilers we mentioned above. Please be aware that the typical prices in the table do not include installation costs.
| 40kW Combi Boiler | Typical Price |
|---|---|
| Worcester Bosch Greenstar 8000 Life Combi | £1,500 |
| Worcester Bosch Greenstar 8000 Style Combi | £1,700 |
| Baxi Duo-tec Combi | £995 |
| Potterton Promax Ultra Combi | £1,310 |
| Vokera Vision Plus C | £1,340 |
| Ideal Vogue Max Combi | £1,340 |
Combi boiler installation costs can vary significantly, depending on where you live, the amount of work required, and the installer you choose to carry out the work. The best way to get the most competitive price is to compare quotes from different installers.
The good news is that you can get free quotes today from trusted Gas Safe registered engineers by completing our online form. All you need to do is answer a few simple questions, and our boiler engineers will be in touch to provide a quote or arrange a home visit.