| There are many different types of Central | | | | A slightly newer, more up-to-date boiler that |
| Heating Systems available. Most if not all of these | | | | many people are choosing over a pumped/vented |
| Central Heating Systems comprise of a boiler, | | | | central heating system is a sealed system. A |
| radiator and pipework. | | | | sealed system, as the name suggests is a closed |
| Due to the average temperature that is seen | | | | system so no water tanks are needed. There are |
| across the UK, Europe and in certain parts of | | | | no tanks or pipework in the loft, the whole |
| Russia, people barely find the need for air | | | | system is sealed, its unvented, which has its |
| conditioning. Most of us need a decent heat supply | | | | benefits:o No risk of freezing pipes in the lofto No |
| far more; this is why the majority of new houses | | | | maintenance work on the tank or pipes that |
| that are being built in this day and age are built | | | | would be in the loft in a pumped/vented systemo |
| with a Central Heating System. | | | | Reduces the risk of leakingo Reduced risk of |
| Heating is vital, especially as winter is fast | | | | airlocks, corrosion and sludge as there isn't a |
| approaching. Heating your home provides a | | | | chance of air being drawn down into the system |
| relaxing and cosy atmosphere. Your Central | | | | through open vents as the system is sealedo Can |
| Heating System needs to be reliable. You should | | | | be flushed out under pressure if needed by the |
| feel that your Central Heating System is safe, | | | | mains water supply |
| easy to use and long lasting. | | | | A sealed Central Heating System is a packaged |
| There are two main types of Central Heating | | | | unit with all the necessary controls and safety |
| Systems; pumped/vented and sealed systems. | | | | devices. The water for a sealed Central Heating |
| Pumped/vented systems are the most common. | | | | System is supplied direct from the main water |
| A pumped/vented Central Heating System has a | | | | supply. It feeds directly from the main water |
| feed and expansion tank. The tank supplies your | | | | supply. |
| house with hot water and provides the radiators | | | | Normal variations of pressure can be allowed in a |
| with heat. The tank makes way for any water | | | | sealed system through a pressure vessel that |
| expansion that is caused by the heating process. | | | | contains compressed gas; this is separated from |
| The tank is placed in the highest place, normally | | | | the sealed system water by a diaphragm. If the |
| the loft area. It heats the house and doubles as | | | | pressure becomes too high in a sealed Central |
| the water supply. | | | | Heating System; a safety valve will allow water |
| A pumped/vented Central Heating System is | | | | to escape from the system and if the pressure |
| what most homes probably have, especially those | | | | drops too low a valve will open to refill the |
| built many years earlier. | | | | system with water. |