Replacing a central heating boiler
Replacing a central heating boiler
You might need assistance in selecting your next gas boiler as this is not a straightforward expense based conclusion. You might begin with the cost but also need to think of other factors, whether you will use one hot tap or many simultaneously it is to be considered, how cost-effective the gas boiler is and what space you have available for the installation.
The most familiar gas boiler types are listed below for your consideration:-
Stand alone gas back boilers
In the past back boilers were frequently installed in households, these are are normally sheltered behind a chimney, the coal fire oftentimes hid the back boiler which was behind it. Low internal water pressure is a problem with these gas back boilers and you will not be putting in one of these unless it is a replacement, they require a lot of space and you will require to find a place to hide this type of boiler. A replacement back boiler however could be your best alternative if you currently have one.
Back boilers have not been very efficient in the past, but the modern domestic back boilers are more economic now, so by replacing an aging back boiler, you could make large savings on your annual heating charges.
The latest Combination gas fired boilers
In recent years the most popular type of central heating boiler sold is the combi gas boiler. Combi gas fired boilers use gas sparingly and are smaller than other gas boiler types enabling them to be squeezed into small cupboards. As they heat water directly from the mains, you do not have to wait for water to heat up - therefore you get a plentiful supply of hot water.
Combi gas boilers have better cost-efficiency than other forms of central heating boiler. Because combi gas boilers dont use an external hot water cylinder, there is no water cylinder to heat first, and no require to reheat the same water once again if youve let it run cold. Look out for someone turning on all the hot water taps in your home whilst you are having a hot bath as it could temporarily turn cold.
Unvented central heating system gas boilers
Your central heating system gas boiler will use a hot water cylinder to store previously generated hot water. This means that you will require an airing closet or alternative space for the hot water storage tank. Constructing the other central heating system constituents into the boiler this means that installation is less complicated and lower-priced.
Drawing several streams of hot water from diverse taps simultaneously is now manageable. You will also get great internal water pressure.
Open vent central heating system gas fired boilers
The most popular home system is an open vent gas boiler. If you have one of these you will need to water cylinders to be installed in the attic, a lot of precious storage space is needed as the hot water storage is also required in the airing cupboard.
Mains supply water is fed via one of attic storage tanks to the hot water storage cylinder.
The 2nd cylinder is the expansion and feed tank which preserves the right level of water for your central heating system, enabling water expansion when you turn the heat on. Whilst you can now run many hot water taps concurrently you will be restricted by the hot water tanks capacity.