This article will go in-depth into the steps that will need to be taken in the process of having a boiler replaced in London. When your boiler breaks down it can cause a lot of stress in the household especially if it happens during the cold London winter months. after you have ruled out the option of having the boiler repaired it is now time to embark on the process of getting a new boiler installed. There a several things that will need to be considered when getting a boiler installation some of which are. What is the current central heating system you have installed. is it a conventional sealed system? is it a combi system? is it a megaflow system? who are you going to get to install the system. what make off boiler is going to be the best for you. how much is it all going to cost. I am going to answer all these questions in this article so sit tight and relax. There are several types of central heating systems that are used in London and the UK all the way from warm air systems to the most common open vented conventional systems. the most common types these days, and the two that i’m going to focus on in this article are the conventional open vented systems and the newer combi boiler systems. If you have header tanks in your loft, a cylinder somewhere in your home and a pump situated outside the boiler its likely you have a conventional fully pumped open vented central heating system these systems are often found in larger homes. combi boilers don't require the header tanks in the loft as the system is fed directly from the mains, the don't have a cylinder as the water is heated instantly as it is passed through the boiler and delivered ready for use, and the pump is usually found inside the main boiler unit. The advantages of a combi boiler are that you get instant hot water, they take up less space in the home due to them to needing a cylinder, they are more efficient. for larger properties however some combi boilers will not be able to cope, especially those with more than on bathroom. conventional boiler systems are able to more easily cope with the demands that larger homes put on them. To get a more accurate assessment of what type of system you will need it is recommended that you call a gas safe qualified engineer who can survey the system and make recommendations. Be sure to get more than one boiler installation quote when deciding which company to go with, at least three. It is also required that central heating system is cleaned before the new boiler unit is added, this done by a process called a power flush. check out http://www.expertpowerflush.co.uk. A power flushing machine is attached to the central heating system and pushes water around it at high velocity with chemicals to clean any oxidised metal in the radiator. oxidised metal creates a sludge like substance in the radiators over time which could potentially ruin a new boiler if not removed.