Is your Central Heating System vented or sealed
Is your Central Heating System vented or sealed
There are numerous different types of Central Heating System available and several types of gas fired boiler to drive these. To help you visualise the choices available we will outline the main variants of system. Most if not all of these Central Heating System comprise of a boiler, radiator and pipework.
Air conditioning systems are not yet a common feature in households whereas every northern European dwelling house is built with a form of central heating. Whether you are looking at a completely new dwelling house or an established house one of the features you will need to investigate is its central heating system.
Whilst we tend to forget about the central heating system it will be functioning daily to furnish hot water and comes to the fore in the winter when heating your household. Heating your dwelling provides a restful and cosy atmosphere. Another essential role for the central heating system is to create hot water. Dependability is a major requirement for your central heating system. You want to fit the central heating system to your home needs so that it both meets your requirements and uses energy efficiently.
Pumped systems and sealed central heating systems are the two primary varieties.
The most familiar type of system is the pumped or vented system. A feed and expansion tank is incorporated into this type of central heating system alongside a hot water cylinder. The expansion tank permits the system to be topped up with water and creates space for the hot water to expand when the heating system is used. If you look for the expansion tank in an existing system you will most normally find it in the attic.
If you purchase a new dwelling you may now find that it contains a sealed central heating system. There is no need for the water expansion tank if you choose to have a sealed central heating system fitted. The mains water is used to supply the sealed Central Heating System. The attic is not now used for the expansion tank or copper copper piping, you get a range of advantages from the elimination of these elements:
- no risk of freezing pipes in the loft
- there are fewer system constituents reducing any maintenance requirements
- fewer leaks from pipe work joints
- you will get fewer problems from air ingress leading to corrosion or blocks
A sealed system accommodates variations in pressure in the water supply by using a water pressure vessel. Valves allow cold water to enter and top up the system when pressure falls, other safety mechanisms open valves if the interior pressure is to high.