The important variations in vented and sealed Heating Systems
The important variations in vented and sealed Heating Systems
Purchasing a new central heating system is not a straightforward thing, you first should know what form of system is best suited to your dwelling. To help you interpret the choices available we will outline the primary forms of system. When you buy a central heating system you are essentially buying a collection of different constituents including a central heating boiler and radiators.
Air conditioning systems are not yet a regular feature in households whereas every northern European dwelling is built with a form of central heating. Nowadays central heating systems are a feature in every modern household.
Try running a dwelling house without your central heating system switched on and you will quickly visualise how important the system is. No one would deny how a dwelling house is changed when we install an economic heating system. The central heating system also can give you a cheap source of hot water. For these reasons your central heating system has to be reliable. Systems tend to last for fifteen years and you will require one that is both economic and reliable.
You will find 2 main system forms, vented and sealed central heating systems.
The most usual type of system is the pumped or vented system. A feed and expansion tank is incorporated into this form of central heating system alongside a hot water cylinder. Water expands when warmed and the expansion tank allows for this. The expansion tank needs to be mounted higher than the other system elements and most often this will be placed in your attic.
A more modern option is a sealed system. Sealed systems have fewer component parts having no need for the water expansion tank. A sealed Central Heating System is attached to the mains water supply to allow the removal of the water feed tank. There are no tanks or copper piping in the attic, you get a range of advantages from the elimination of these parts:
- no chance of freezing pipes in the attic
- no maintenance work on the tank or pipe work that would be in the loft in a pumped or vented system
- less hazard of pipe work developing leakages
- you will get fewer troubles from air entry leading to corroding or blocks
Normal fluctuations of pressure can be permitted in a sealed system through a pressure vessel that holds compressed gas. A escape valve will open if the pressure is higher than recommended. Similarly cold water is allowed into the system if the pressure is lower than the recommended level.