Picking Out a new central heating boiler
Picking Out a new central heating boiler
You could want assistance in selecting your next gas boiler as this is not a straightforward expense based decision. The price will be one leading influence but there are other elements, you will need to judge when and how much hot water you will use at any moment, how much space you have in your home and loft together with how much gas central heating boiler will use over its lifetime.
We have listed in the most familiar types of central heating boiler below to give you supplementary data:-
Gas Fired domestic back boilers
In the past domestic back boilers were frequently installed in households, being installed in the chimney they were sheltered from view, the coal fire often hid the back boiler which was at the back of it. If you are going to change or boiler you will not be installing one of this type as they had certain drawbacks and in particular low internal water pressure, it is space-hungry and you will need someplace to hide your boiler. If you already have a back boiler however a straightforward replacement could be your best alternative.
In the past back boilers have not been known as being very cost-effective, but the modern gas back boilers are more efficient now, so by replacing an older back boiler, savings on your heating bills could be available with a more economical boiler.
Combination central heating boilers
Combi gas boilers have become the best selling gas fired boiler type for gas central heating in the UK. Combi central heating boilers use gas sparingly and are smaller than other boiler types allowing them to be squeezed into small cupboards. They also heat cold water instantly meaning that you do not will have to wait for a hot water tank to warm up – hence you get an unlimited stream of hot water.
They are more cost-effective than other types too. There is no hot water storage tank reducing heat losses in the system. Look out for someone turning on all the hot water taps in your household whilst you are having a hot bath as it could temporarily turn cold.
Unvented central heating boilers
central heating boilers store hot water in a hot water tank. You will want to find some room in the airing cupboard accommodate this. One advantage of this type of system is as many of the system components are built into the boiler enabling a quicker and cost installation.
You can now draw several hot water taps concurrently as they are supplied from the hot water tank. internal water pressure is enhanced if the cylinder is installed high in the house.
Open vent system boilers
an open vent heating boiler is the regular central heating system in most peoples homes. This type of system uses 2 water cylinders, both located in the attic, additional space is also called for for the hot water storage cylinder fitted in the airing cupboard.
The first cylinder in the loft feeds mains supply water to the hot water storage cylinder.
Water expands when heated and this is facilitated by the second tank in the loft. The only limit on hot water supply now is the capacity of the hot water cylinder which will take a while to heat up completely.