If you’re planning to upgrade or replace your boiler by installing the option of a combi boiler, this guide can answer your query about the best combi boiler available on the market.
Introduction to the Best Combi Boilers
Here you can find all you must be aware of about combi boilers, including rules as well as costs and benefits and provide you with the top combi boilers on the market.
What is a Combi Boiler?
A combi boiler is a single compact unit that includes an efficient water heater as well as a central heating boiler that can provide power for both water and heating.

Many homeowners favor combi boilers because they are efficient and affordable because they can quickly heat water without the requirement for the use of cylinders.
How Does a Combi Boiler Work?
A combi boiler operates by heating water directly by drawing water from the supply, which happens when you turn on a hot faucet, because this activates the heat exchange system, which allows heating on demand along with hot water. This is what differentiates them from other boilers that require tanks of water storage to make hot water.
Most combi boilers make use of oil as their fuel source However one LPG combi boiler requires Liquid Propane Gas which can be stored and delivered to tanks outside your house.
Advantages of Installing a Combi Boiler
Before you purchase an electric combi boiler, be aware of these benefits to make sure that the combi boiler is suitable for you.
Efficiency
Combi boilers are considered to be one that is among the best boilers that are available that has an efficiency rating of 90.
The reason for its superior level of efficiency is because combination boilers heat water as needed in contrast to older models, that store the water in a cylinder. They take longer to warm up.
Combination boilers function by delivering water through the mains pressure. This allows greater flow of water and makes your shower stronger without the use of pumps.
Cost-effective
The primary purpose of combi boilers is to heat water at-will instead of the waste of the water in storage tanks.
This can help reduce costs for utilities since less energy and water is required in the long term. In reality, homeowners could actually save as much as £300 or more per year by switching to the combi boiler.

The combi boilers also are less difficult to install, so the cost of installation will be lower than traditional boilers.
It is because combi boilers have only one compact unit. System boiler installation requires fitting the boiler, as well as an storage tank.
Compact
Combination boilers are the ideal option for those who lives in a tiny house because their small size means that they occupy less space.
Due due to their dimensions Due to their size, combi boilers tend to be placed in airing cabinets where they are accessible and hidden from view.
Hygienic
A combi boiler inside your home could make the water at your home more clean:
The reason for this is that the water is funneled directly through the mains which permits the water to become more hygiene-friendly to drink and wash.
Low-maintenance
Another benefit of using the combination boiler is the fact that they’re much cleaner since they are less likely to suffer from debris build-up because of the water being fed directly by the mains, in contrast to storage tanks, which are more prone to dirt and rust.
They are more convenient to maintain as they are smaller than traditional tanks. They are also extremely popular, so you must always be in contact with an engineer should you encounter any problems.
Best Combi Boiler Review
If you’re asking what is the most effective combi boiler, then check out this guide that spells out the most efficient models of combi boilers as well as the costs associated with them along with the advantages and disadvantages of each.
Viessman Vitodens 050-W Combi Review
One of the top-rated combi boilers to be found is Viessman Vitodens 580-W Combi that is extremely compact at just 707mm tall. It is among the most compact combi boilers with two options for heat output, which include 29kW and 35kW.
The major advantage of this boiler combi is that it is cost-effective, with prices ranging between £800 and up £1100.
The boiler is also extremely sturdy, as it has an exchanger made of stainless steel which is constructed to last, and also reduces its maintenance needed.
The disadvantage for this model is it’s not ideal for homes that have at least three bedrooms since it’s small and thus cannot accommodate bigger homes with more than ten radiators.
Vaillant ecoTEC exclusive Combi Review
A Highly recommended combi boiler to consider is one called the Vaillant ecoTEC Exclusive model that comes in a variety of outputs like 35kW and 43kW.
It is a wall-mounted boiler that operates using gas, though there is an option of LPG conversion. The price of this boiler ranges from £1400 up to £1800.
If you’re thinking about what is the ideal combi boiler for your house, this model would be perfect as it comes with an astonishing 17 litres of heated water every minute. It is also one of the eco-friendly boilers because it is constructed of 85% recycled materials.
This ecoTEC unique boiler capable of working with intelligent thermostats like Hive and Nest which can help you lower your energy costs as well as carbon footprint.
If you don’t have high water pressure, this boiler might not be the best choice, since the boiler needs high pressure in order to function at its peak capacity.
It might not be a good choice if reside in a smaller house because it was designed to warm a house with between fifteen and twenty radiators.
Worcester Greenstar 30i Review
This combi boiler is another well-rated model that comes with 24kW of heating power and 30kW hot water production and also 12.3 Liters of water per minute. Expect to pay approximately £1000 or £1400 for this combination boiler.
This Worcester model has simple design of the panel that allows for easy maintenance and can help you reduce your costs for maintenance.
Another benefit of this particular boiler is that it is extremely efficient in energy use and has an efficiency rating of 93%..
This combi boiler isn’t ideal for homes that have greater than two bathroom and three bedrooms since it doesn’t have the capacity to hold more than ten radiators, or additional hot water outlets.
Baxi 800 Platinum+40kW Combi Review
Platinum Baxi co-op boiler comes as a wall-mounted unit with a powerful 40kW of heat output as well as an average flow rate of 16.4 millilitres per minute.
The cost for this boiler is between £1300 up to £1600.
This boiler offers a myriad of benefits like its frost thermometer that is built in. It is installed to make sure the boiler’s water doesn’t freeze over during winter months.
This allows for space flexibility and flexibility, particularly in smaller houses in which there isn’t enough room and the boiler could be placed in a garage, where it is secured.
The disadvantages of this model is that it’s very expensive in comparison to its size. It also has the potential for issues according to the most reliable combi boiler reviews, which could indicate that it is insecure.
Ideal Logic+ 30kW Combi Review
The combination boiler is designed for homes with mid-range requirements, such as three to four bedrooms and up to 2 bathrooms. It comes with an outdoor sensor that monitors the temperature outside, and permits an adjustment in the flow of water.
The best Logicplus combi boiler will cost about £800 to £900 and is among the most affordable combi boiler models.
One of the major benefits of the Ideal Logic+ boiler is it has an electronic programmer radio frequency which allows you to manage the heating from an easy dashboard, while providing holiday modes. It also comes with the efficiency of 91% which makes it one of the highest price combi boilers available.
One disadvantage of choosing this particular boiler is that it’s not suitable for large homes because the output isn’t large enough. Comparatively to other boilers, this one has a less lengthy warranty of only seven years, which might not be appropriate for larger homes.
Cost to Install a Combi Boiler
Now that you know about the boiler’s only costs You must also consider costs for installation to figure out the exact amount the installation of your combi boiler will cost.
For the installation of an electric combi-boiler, you’ll require a licensed heating engineer. They will charge approximately £150 or £350 per day, depending upon the work.
The cost of installation of a combination boiler begins at £600 for replacing an existing boiler using the identical model. If you plan to install the combi boiler within a specific location, you can expect to spend around £1600 or £2500 when replacing a conventional boiler.
Boiler Regulations
Before you hire a specialist engineer for the installation of your brand new combi boiler, it’s essential to be aware of the latest regulations for boiler installation.
It is highly unlikely that you’ll need to seek approval from the building regulations for replacing an existing boiler, however, the regulations must be adhered to in order to ensure that your boiler’s fitting is in compliance with.
In order to do this, you’ll have hire a tradesman that is registered under the scheme of the competent person and ensure that you choose an engineer who is suitable for your specific boiler fuel type.
For example the gas safe engineer is able to install a gas boiler so provided they are registered on or after 1st April 2009.
If you do not employ an employee that is approved and the person who performed the task isn’t able to self-certify installation.

In addition, you will need to contact your local municipality and inform them about the project, which would require paying a notification cost.
Your local authority might decide to inspect the work by an approved installer to make sure the work is in compliance. If there isn’t, then you will have to pay the removal and replacement of the boiler according to the latest guidelines.
The boiler itself has to comply with certain standards, for example, every boiler fitting should be efficient to minimum 85 percent for oil, and 86 percent for gas. The efficiency should be evaluated by an installer prior to installing it.