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Sealed Or Vented Systems Most households have a type of heating and it is accepted that the most common is gas heating. 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. Most existing houses and virtually all new dwelling developments now incorporate central heating systems to heat the household and supply hot water. Before you get a central heating system you need to establish what type of system and heating boiler you will want. This page will help you to visualise the choices available to you. When you purchase a central heating system you are essentially purchasing a collection of different parts including a central heating boiler and radiators. Having become used to modern conveniences we cannot do without a heating system. No one would deny how a dwelling is transformed when we install an efficient heating system. Another essential role for the central heating system is to create hot water. As heating and hot water are essentials your system needs to be reliable. Out of sight everyday functioning without unpredicted failures is a standard requirement of any central heating system. There are two main variants of Central Heating System; pumped or vented and sealed systems. Expect to find a pumped or vented central heating system as they are the most familiar. This type of system has a feed and expansion tank together with 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 expansion tank needs to be installed higher than the other system component parts and most often this will be positioned in your attic. A more modern alternative is a sealed system. The water expansion tank can be dispensed with in a sealed central heating system. The mains water is used to supply the sealed Central Heating System. This removes the requirement for any pipework or central heating water tanks in the attic, the sealed nature of the system without any venting delivers a number of benefits: - reduces the risk of leaking - there are fewer system elements reducing any upkeep requirements - taking out the copper pipes from the attic takes away any risk of them freezing - 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 variations in pressure in the water supply by using a water pressure vessel. Safety valves open if the inner pressure is too high. Other automated valves open to allow the internal water to be topped up if it drops to low. David is the maintainer of Heating Boilers , an informative site which contains guides on selecting the right central heating boiler. http://www.heating-boilers.org . Please visit for more ideas on how to save money on boiler purchase and installation.
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