2. How does a system boiler work

How does a system boiler work?

A system boiler, or sealed system, is a great option if you have more than one bathroom or your household has a high demand for hot water.

 

How does a system boiler work?

 

A system boiler contains all the major components of the heating system, including the pump and expansion vessel, which means installation is quick, neat and efficient. The boiler heats the water in a hot water storage cylinder, which in turn heats the water in the central heating system via a coiled heat exchanger and provides hot water to taps and showers.

 

Do I need a system or combi boiler?

 

If you have a high demand for hot water, for example, if you have more than one bathroom or shower room, a system boiler may be the perfect choice for you.

 

Will I need a separate expansion tank in the loft?

 

There is no need for a feed and expansion cistern in the loft if you have a pressurised unvented hot water storage cylinder. If you have an open vented hot water cylinder, you will need a cold water storage cistern in the loft.

 

Can system boilers supply several taps at once?

 

A system boiler is perfect for homes with multiple bathrooms; hot water is provided by a storage cylinder, so no matter how many taps you turn on, water will not run cold elsewhere in the house.

Our System Boilers

Our System Boiler heats up water in a sealed hot water cylinder, usually found in the airing cupboard, for hot water taps around the home.

Related FAQs

Should I turn off my boiler in the summer?

Instead of turning off your boiler completely during the summer, when you likely have less need for heating, you can use Holiday Mode to ensure it works at a low level and prevent parts from seizing up later on in the year when you have greater need. You can also set your boiler to only heat your water and not your radiators.

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Is a condensing boiler a combi boiler? 

Most modern combi boilers are condensing models. This means the heat and gases that escape through the flue pipe are captured and reused for efficiency.

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Why is my external condensate pipe freezing?

Condensate pipes can freeze due to extremely low temperatures or ice building up on the pipe, which will need clearing in order to unction effectively. Insulating your pipe can prevent this from happening.

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Why should I get the water in my central heating system cleaned?

It’s important to have the water in your central heating system cleaned regularly to prevent sludge buildup, which can lead to blocked pipes and ultimately, cause breakdowns. Repairs needed as a result of sludge are not covered by Baxi warranties.  

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How old is my boiler?

You can find out how old your boiler is through the industry database, using its serial number.

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