July 18

Difference between Vented and Unvented Boiler Cylinder

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What is a condensing boiler? If you purchased a boiler after 2005, chances are that it is a condensing boiler, a high-efficiency boiler. Rather than being a ‘type’ of boiler - such as combi boiler, system boiler or conventional boiler - the term ‘condensing’ refers to the way it functions. There are three main types of the gas boiler - Combination (or combi), System and Regular. If you are unsure about the type of boiler you currently have, these two simple questions will help 1. Do you have a hot water cylinder? (this is usually in a cupboard or airing cupboard) No - You have a Combi Boiler Yes - You have a Regular or System Boiler 2. On the Boiler, Is there a Pressure Gauge? No - You have a Regular Boiler Yes - You have a System Boiler Boilers can be confusing, especially when you are looking for a new boiler. When you know a little about the boiler types - discovering the right replacement gas boiler for your home can be easy. COMBI BOILER A Combination boiler is a simple unit that delivers both hot water and heating, which makes them great for small to medium-sized homes. Combi boilers heat water directly from the mains, whenever you turn on your hot tap. If you are buying a new combi boiler, you don't need a hot water storage cylinder or a cold water storage tank in the loft, so they save space too. SYSTEM BOILER Unlike gas combi boilers, a system boiler needs a cylinder for storing hot water, but they don't take up space in your loft. With a system boiler, some of the main heating and hot water system components such as the pump are built into the boiler itself, so it's quick and easy to install. A System boiler is ideal for homes with two or more bathrooms as it can allow you to have multiple showers running at the same time. A CONVENTIONAL BOILER OR REGULAR BOILER A Conventional boiler also called regular, open vent or traditional boilers, need both a hot water cylinder and a tank in the loft to store cold water. This type of boiler is perfect for homes where a lot of hot water is used at the same time and are particularly well suited to low water pressure areas and installing into systems which have lots of old radiators.


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