Instant Boiler Quote Contact Us

The Pros and Cons of a Combi Boiler

If you’re looking to have a new boiler installed in your home, it’s worth finding out more about combi boilers to see if one could be right for you. A combi boiler works differently from a regular or system boiler, in that it pipes hot water directly from the mains as you need it, instead of storing it in a cylinder. This means it has the potential to work extremely efficiently and reduces the usual storage requirements. However, nothing is perfect, so it’s worth finding out more about a combi boiler before you commit, to decide if the pros outweigh the cons and will work well in your home. 

Combi boiler pros

Combi boilers are self-contained, so they don’t need a tank or immersion heater. This makes them cheaper and easier to install.

Water is heated as soon as you need it, so no waiting and no waste!

Because combi boilers only heat the water you need, they use less energy which in turn can save you money on your bills.

A combi boiler saves on storage as they don’t require a tank or hot water cylinder installing.

Your home’s EPC (Energy Performance Certificate) rating can be improved due to the efficiency of a combi boiler.

Because a combi boiler just heats water as needed rather than storing it, there’s less chance of sludge and rust building up in your system.

Combi boiler cons

Combi boilers don’t let you use hot water from more than one source at a time. This can be problematic if you want to wash up in the kitchen while someone else is having a shower. 

Because of this, combi boilers aren’t suitable for homes with more than one bathroom, or homes where there’s a high demand for water.

Combi boilers only perform well if the mains pressure in your local area is good. If it isn’t, you will get much better performance from a different type of boiler.

Combi boilers risk you being without hot water if they ever break down. This is because they don’t work with an immersion heater so there’s no alternative for heating your water. As soon as they are fixed you’ll have hot water again but depending on the time the repair takes this can be very inconvenient. 

Because the pressure of a combi boiler is set by the mains and can’t be changed, you can’t have a power shower when you have a combi boiler. 

Offering experienced boiler installations in Ashford Kent

The friendly and experienced team at Boiler on the Blink are happy to help with your combi boiler (or other boiler) queries. We work with customers across Ashford, Romney Marsh, Tenterden, Folkestone, and the surrounding areas within 15 miles, so just let us know how we can help. You can contact us by: Telephone on 07768 618877 or Email at or Website via our contact form.