System Boilers and Why They’re Worth Considering

//System Boilers and Why They’re Worth Considering

System Boilers and Why They’re Worth Considering

People choose to upgrade their boiler for a series of components. It may be that their existing one is malfunctioning, old or inefficient.

When you’re choosing a new boiler, you have various choices. These include combi boilers, standard boilers and system boilers. Each of these boilers run in different ways and are matched to various house sizes.

System boilers are otherwise known as sealed system boilers. Like basic boilers they have hot water cylinders, however, they do not have cold water tanks. System boilers are normally installed in bigger domestic or organisation homes.

To help you decide whether you need a system boiler in your house, we have produced a list of their benefits and downsides.


Can provide hot water to a range of taps

System boilers can supply hot water to a range of taps at one time. They can do this without activating a drop in water pressure. This is due to the fact that system boilers heat water ahead of time, so when hot taps are turned on the warm water can immediately go to any location it’s needed.

This contrasts with combi boilers, which don’t heat water ahead of time and as a result fight to heat enough water for lots of taps at the same time. This can trigger water that is not hot enough or low in pressure. So while combi boilers are excellent for smaller sized houses, system boilers are far better matched for bigger domestic or commercial properties, where hot water might be needed from many taps at the same time.

Takes up less space than a standard boiler

System boilers take up less room than basic boilers. This is due to the fact that they do not have a cold water tank, whereas conventional boilers do. So if you want to establish a system boiler in your house, you just need to find space for a hot water tank and the boiler itself.

Works with solar hot water heating unit

Like standard boilers, a great range of system boilers are compatible with solar water heating systems. This is because they have hot water tanks, which can be modified or changed to heat water using solar energy. Combi boilers do not have warm water tanks, so are not ideal. So if you desire to utilise solar water heating, a system boiler may be an impressive option for you.


Simply heats up water ahead of time

System boilers only heat water ahead of time. This means that you need to have your boiler on a timer that you can set to heat water for when you typically need it, or you’ll have to keep in mind to turn it on before you require it. This generally works well for individuals who have routine schedules, however if you opt to use warm water at various times on different days, a system boiler might not be for you.

Hot water supply can run out

Another disadvantage to system boilers is that the hot water they produce can run out. A system boiler’s warm water tank can only hold a set amount of water, so if you use a significant quantity of hot water at one time it may wind up running out. And due to the fact that system boilers can only heat up water ahead of time, you’ll have to wait for the hot water tank to fill up prior to having hot water again.

Uses up more room than a combi boiler

System boilers fill more space than combi boilers. This is because combi boilers do not require a hot water tank, whereas system boilers do. So if you have limited space in your house, a system boiler might not be the best option for you.

So now you’ll know a bit more about system boilers and whether you should install one in your house. If you want to install one and need an engineer to fit it, we can help. Fill out our online form and we’ll connect you with approximately 4 specialists in your area. Or to discover other boilers, have a look at our info on combi boilers.