Sealed or Vented systems
Sealed or Vented systems
These days there is a choice of gas boiler types to drive your central heating system according to your family requirements. This document will help you to understand the alternatives available to you. The primary alternatives are driven by gas fired boiler type although this will impact upon the other system constituents.
Air conditioning systems are not yet a regular feature in homes whereas every northern European household is built with a form of central heating. Virtually all new housing developments incorporate central heating systems as a stock fixture within the dwelling house.
Heating is vital, especially in winter. Heating your family provides a relaxing and cosy ambience. In addition to heating the family the central heating system will be used to furnish hot water when called for. For these reasons your central heating system has to be dependable. You should sense that your Central Heating System is dependable, easy to use and long lasting.
There are two main forms of Central Heating System; pumped or vented and sealed systems.
The most usual type of system is the pumped/vented system. You will find that this configuration contains a feed and expansion tank in addition to a hot water cylinder. The tank makes way for any water expansion that is caused by the heating process. The loft is most normally used to house the expansion tank as it needs to be high in the house.
A slightly newer, more present-day system that numerous people are choosing over a pumped/vented central heating system is a sealed system. There is no need for the water expansion tank if you choose to have a sealed central heating system installed. The mains water is used to supply the sealed Central Heating System. if you take this system you don’t need to use your attic for housing in the expansion tank thereby saving space, the sealed nature of the system without any venting delivers a number of benefits:
- taking out the copper pipes from the loft takes out any risk of them freezing
- fewer components require less upkeep
- less chance of leakages
- the sealing of the system prevents air entering which could lead to internal corrosion or the development of an air lock
A sealed system accommodates fluctuations in pressure in the water supply by employing a water pressure vessel. This system has a valve that allows mains water to enter the system if the water pressure has flattened. An alternative valve will open if the pressure is detected as being too high.