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Is your gas heating system vented or sealed







Is your gas heating system vented or sealed

Before you get a central heating system you need to establish what form of system and boiler you will want. This article concentrates on the form of system available. The form of central thinking system selected will determine the type of gas fired boiler to be installed.

In terms of the systems within your household the central heating system will be one of the most expensive and the one that is in day-to-day use, and cooling systems are seen less often. Virtually all new housing developments incorporate central heating systems as a stock fixture within the dwelling.

Heating is vital, especially in wintertime. You can unwind at dwelling house when the heating is functioning. In addition to heating the dwelling the central heating system will be used to furnish hot water when required. As heating and hot water are essentials your system needs to be dependable. You want to fit the central heating system to your household needs so that it both meets your requirements and uses gas efficiently.

Whilst there are several varieties the two main types of system are vented and sealed systems.

pumped or vented systems are the most familiar. This type of system has a feed and expansion tank together with a hot water cylinder. Water expands when heated and the expansion tank allows for this. If you look for the expansion tank in an existing system you will most usually find it in the loft.

If you get a new dwelling you may now find that it incorporates a sealed central heating system. Sealed systems have fewer component parts having no need for the water expansion tank. A sealed Central Heating System gets its water direct from the mains supply. This frees your loft of the expansion tank and copper piping, the sealed nature of the system without any venting delivers a number of benefits:

- no chance of freezing pipes in the attic

- there are fewer system constituents reducing any upkeep requirements

- less chance of leakages

- as the system is sealed there is less chance of air entry leading to corrosion or airlocks

Any water pressure variations are accommodated by the incorporation of a pressure vessel. Valves allow cold water to enter and top up the system when pressure falls, other safety mechanisms open valves if the internal pressure is to high.

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