Sealed or Vented Central Heating Systems

There are many different forms of Central Heating System available and several types of boiler to power these. Below you will find an outline of the main forms of central heating system currently traded. The form of central thinking system taken will determine the type of boiler to be installed.

Whether you are buying a new development or established household you’ll find that it will contain a central heating system which is a modern day necessity. Nowadays central heating systems are a feature in every modern dwelling house.

The value of central heating systems is fully realised in winter although most are also used to furnish hot water every day of the year. Most homes are changed when the heating system is switched on delivering a comfortable temperature. A central heating system also delivers hot water for bathing and washing. Dependability is a major requirement for your central heating system. Systems tend to last for fifteen years and you will want one that is both efficient and reliable.

Whilst there are multiple forms the two main types of system are vented and sealed systems.

Expect to find a pumped/vented central heating system as they are the most common. A feed and expansion tank is incorporated into this form of central heating system alongside a hot water cylinder. In addition to allowing for water expansion when heated the expansion tank also tops up the central heating system with water when called for. The attic is most usually used to house the expansion tank as it needs to be high in the house.

Sealed central heating systems are now more usually installed in new homes. Sealed systems have fewer parts having no need for the water expansion tank. The mains water is used to supply the sealed Central Heating System. This removes the requirement for any copper piping or central heating water tanks in the attic, the sealed nature of the system without any venting delivers a number of benefits:

– as the pipe work is removed from the loft it will not be at risk of freezing in the wintertime

– your maintenance requirements are reduced as there are fewer components

– less chance of leakages

– the sealing of the system precludes air entering which could lead to internal corroding or the development of an air lock

A pressure vessel is included in the system to deal with any pressure fluctuations in the water supply. Valves allow cold water to enter and top up the system when pressure falls, other safety mechanics open valves if the internal pressure is to high.

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