Replacing a heating boiler
Replacing a heating boiler
Choosing the best central heating boiler can be a complex project. In addition to the cost involved, you will need to evaluate when and how much hot water you will use at any time, the storage space you have available for heating heating boiler component parts and how green the heating boiler is.
The most familiar gas boiler types are:-
Gas gas back boilers
Some houses still have back boilers, installation of these domestic back boilers was commonly at the back of the chimney in the front room, with a fire in front to obscure them. These are now only installed as a replacement and they have some disadvantages such as low water pressure, they take up space to install and there needs to be somewhere to obscure the boiler. Having said this your best alternative could be a substitute if you currently have this type of boiler.
In the past gas back boilers have not been known as being very efficient, but the more recent versions are more economic, so by changing an aging back boiler, savings on your heating bills could be available with a more efficient boiler.
Combination boilers
In recent years the most popular type of gas boiler sold is the combi central heating boiler. As a combi boiler is small and it will fit into a cupboard and uses gas very efficiently. Heating water direct from the cold mains removes any wait time for hot water – consequently you get a plentiful supply of hot water.
They are more cost-efficient than other types too. As they don’t store hot water there are decreased heat losses. Look out for somebody turning on all the hot water taps in your household whilst you are having a hot shower as it could temporarily turn cold.
Unvented system gas fired boilers
A hot water tank is used by a central heating gas boiler to store of water. This will demand space in your home. Constructing the other system component parts into the gas fired boiler this means that installation is less involved and lower-priced.
Getting various streams of hot water from diverse taps simultaneously is now possible. You can get a good water pressure from a central heating system heating boiler by putting in the hot water cylinder high in the home.
Open vent system central heating boilers
Most probably your dwelling house will have an existing open vent heating boiler fitted. The open vent gas boiler requires to water tanks to be fitted in the attic, this is in addition to the hot water storage tank in the airing closet and all this takes a lot of space.
One tank takes in water from the mains supply and feeds the hot water storage cylinder.
The 2nd is called the feed and expansion and this enables the water in your system to expand and contract. Several taps or showers and baths can be run simultaneously but the hot water cylinder does have a limited capacity.