Which combi boilers to avoid?

Combination boilers, commonly known as combi boilers, are modern solutions for accessing heating and hot water that consist of both a high-efficiency water heater and a heating boiler.

The main factor differentiating combi boilers from traditional boilers is the absence of a water tank. Combi boilers have become extremely popular with consumers over recent years as they take up limited space when compared to traditional systems. They can also provide hot water on demand and don’t need a separate water tank for storing hot water.

Combi boilers are also extremely efficient than traditional systems. Instead of heating water continuously by means of control through a thermostat, combi boilers only function when they are asked to. When hot water is needed, the combi boiler heats water directly flowing from the mains or the water tank as it flows through the boiler. This warm water is then passed through radiators that provide heating and through the plumbing system wherever hot water is needed, like in bathrooms and kitchens.

As the combi works only for only a limited time, it is generally considered far more efficient than other types of boilers.

Benefits of combi boilers

Easy to install

Combi boilers are quite easy and manageable to install when compared to traditional boilers that have loads of paraphernalia that come along with it. The installation process is much less labour intensive. 

Improved pressure

Combi boilers provide a consistent pressure of water. Even if you are using multiple taps at the same time, the combi will ensure that all supply points receive an even flow of warm water 

Limited space

Combi boilers are generally much smaller in size than traditional boilers, meaning they take up much less space. Combi boilers come without separate hot water cylinders and tanks, hence needing only a fraction of the space to perform.


Combi boilers work only when there is a need for hot water or heating, so they help the building owners save big on energy costs.

Instant hot water

A combi boiler provides hot water in an instant, meaning you don’t have to wait for hours before hot water becomes available for use.

Reduced leaks

As combi boilers do not need a separate tank or cylinder to store water, there is a reduced risk of leaks and water-induced damage.

Combi boilers to avoid

Combi boilers come in a variety of shapes, sizes, and specifications that suit a host of different-sized homes and other types of buildings. 

While looking for a combi boiler, you must consider aspects such as the size of your home, your hot water requirements, and your budget, as well as factors such as efficiency ratings and warranties. 

While your only source of credible information about a product used to be salespersons and word of mouth, times have certainly changed. Social media has become one of the most useful of your allies when it comes to finding out something about a person, place, or product. 

Each combi manufacturer offers a unique feature in its products, so it is advisable to undertake due diligence. One of the easiest ways to gauge the performance of a combi boiler is to check for reviews online. Every manufacturer operating today maintains a social media presence to keep in touch with its customers, so it is not hard to dig up information about a combi boiler you are considering. 

Look for testimonials and ratings about a combi boiler. It is indeed true that some products develop operation issues once they are put in use, but there are others that have faults built into them from the factory. Be wary of such combi boilers and their manufacturers. People will generally have accounts of their experiences with a bad product, which you can utilise as market intelligence to make an informed decision.

Also, stay away from combi boilers that are imported but whose manufacturer does not maintain an aftersales and spare parts service network. Such combi boilers would only invite trouble and cause great distress.

Combi boilers offer a load of benefits over traditional boilers, but making a hasty choice after being impressed by the physical attraction of the product and the hollow claims of the manufacturer will make you regret your decision badly. 

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