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At Boilerhut, we offer comprehensive installation of conventional boilers across the UK.
Also known as regular boilers or open vent boilers, conventional boilers are the most traditional form of boiler installed in the UK and comprise of several components.
For many years, conventional boilers were one of the only boiler options and were installed into many UK homes as standard when they were built.
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This type of boiler is ideally suited for larger homes with a higher number of radiators and multiple bathrooms. If you have a larger household and live in a property with multiple bathrooms, then a conventional boiler may be suitable.
However, there are a number of considerations to make before choosing this type of boiler. If you are replacing an existing boiler, it is usually recommended that you have a like-for-like swap.The reason for this comes down to the layout of your heating system and how long a new boiler will take to install.
Swapping an existing conventional boiler for another conventional boiler will be easier and cheaper than swapping a combi boiler for a conventional boiler. As conventional boilers require a separate cylinder for storing hot water, it is important that you consider whether your home has enough space to accommodate this.
However, if you have an airing cupboard or spare cupboard space to hide the cylinder away, a conventional boiler will be suitable for installation at your property. You will also need to consider whether you have the loft space to accommodate the water tanks used with a conventional boiler.
How do conventional boilers work?
Open vented boiler systems
Conventional boilers are open vented boiler systems. In an open vented boiler system, the system utilises a feed and expansion tank to supply the central heating circuit with water and accommodate the expansion of water when it is heated by the boiler.
The feed and expansion tank is usually situated in the loft, where it forms the highest point of the central heating system and feeds into the boiler using gravity.
It is for this reason that the cold water tank is installed in the loft as high as possible to increase the water pressure. It is also the reason it is sometimes called a header tank.
An open vented boiler system works by the domestic water tank in the loft being filled with cold water from the mains supply and this water then circulating through the boiler several times where it is heated until it reaches the required temperature and then being stored in the hot water cylinder until you use a shower or a hot tap.
Water in the heating circuit passes through the boiler where it is heated. This water circulates through the radiators heating them up which then transfers the heat energy into the air warming the property.
Whilst most feed and expansion tanks are made from plastic today, it should be noted that in the past they were often made from asbestos and galvanised steel. Typically, these tanks have a capacity of 18 litres.
Conventional boiler advantages
Conventional boiler disadvantages
