With the new technology there are a lot of new systems coming into the market on the daily basis and they are all designed to do the same job and that is to heat the water for you. They come in different shapes and sizes, they can go on the wall or be standing on the floor. In some cases they can even be fitted in a cupboard as long as you have proper ventilation. So the choices are endless, the only difference between these systems is how do they produce the hot water for your needs. There are mainly two types of boilers, they are traditional or combination.
From 31st March 2008, all oil and gas fired boilers installed as replacements in existing dwellings must meet a minimum seasonal efficiency of 86%, where practicable. This requirement was introduced as part of the revision of the Building Regulations Part L “Conservation of Fuel and Energy” adopted in December 2007. Currently the only boilers achieving this performance level are condensing boilers.
These kind of boilers in conjunction with a hot water storage cylinder can deliver the hot water all through different pipes in the house simultaneously. Traditional boilers come in different sizes and shapes but they tend to be smaller than combination boilers. They can be placed inside or outside the house in a boiler room. The size of the cylinder should be decided by you based on the amount of water needed in your household. You will also require a cold water tank which usually is placed in the loft space.
These boilers have a special heat exchangers in them and heat the water through this unit. The main advantages of this system is that there is no need for a cold water tank as the system can take direct feed and there is also no need for hot water storage tank as the boiler heats the water as is needed. These system again like tradition boilers come in variety of sizes and specification.
Condensing boilers are highly efficient. They use less fuel and have lower running costs than other boilers. Higher efficiency levels are made possible by extracting heat contained in the combustion gases, which would otherwise have been lost to the atmosphere.
This is because both oil and gas contain hydrogen locked within their chemical structure. When oil or gas is burned, the hydrogen links with oxygen in the air to form H2O (water). This water (as vapour) can be seen from the exhausts of cars on cold days. The vapour (or steam) contains about 8% of the total fuel’s energy and capturing it makes energy efficiency sense. This is exactly what condensing boilers do. They “condense” the vapour and capture the energy contained there, making modern boilers so much more efficient.
All boilers need air for combustion and a flue to get rid of the combusted particles which is mainly water vapour and carbon dioxide. Flue’s again come in different types and it all depends on the type and the make of the boiler that you choose. Flue’s can be conventional, which is the traditional chimney flue or boiler assisted flue’s. For more information on the flue system required you should discuss this with your plumbing engineer before the construction of the house as you might need a special location to place the flue for your chosen boiler.