How do you find out what type of central heating system I have?

Luckily there are only two main types: "Sealed" and "open vented".

Sealed systems can be identified by a pressure gauge on the boiler, while open vented systems have a feed and expansion water tank in the loft, there normally is 2 whater tanks in the loft a large one and a small one, this is the small one. On open vented systems you should also have a cylinder (white or orange) for the hot water, somewhere else in the property, normally in an airing cupboard.

 

 

 

 

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