A hot water cylinder is a type of hot water tank that can be used for space heating or storing hot water for domestic usage. It is a very useful and convenient type of storage medium for conserving hot water because water has a very high specific heat capacity. It is a type of insulated tank that can store water in it for days thereby reducing the cost of other fuels for heating. A hot water cylinder can heat water using an oil burner or a built-in gas system, come of them can also have an external heat exchanger like a central heating system where water is heated through some other source.
The most typical types of cylinders make use of a fossil-fuel burner with an electric immersion element in it. They can be used for bathing, laundry or washing purposes and have a thermostat control for temperature regulation. Water can be obtained from 40 degrees to 60 degrees Celsius, and they can easily be connected to the domestic water supply. The different types of cylinders that can be available are as follows.
- Unvented cylinder – An unvented hot water cylinder makes use of the mains water pressure to distribute hot water within a premise. They usually come as a part of a system boiler installation as that can help in taking advantage of the high-pressure supply that is there in a domestic water line. In such a system, no feeder tank is needed and therefore, they take up very little space for installation. Unvented cylinders are highly preferred these days due to their easy setup and maintenance.
- Vented cylinder – A vented hot water cylinder needs a regular feeder tank so that the mains cold water can flow in it for heating. After heating is achieved, the hot water can then flow through the outlets as a part of the gravity-fed system. Compared to an unvented system, this type of system is normally used along with a regular boiler installation whereas, in the former system, it can be used with system boiler installations. However, a vented system may need enough space for setting it up, and that must be sorted out.
- Direct cylinder – When a conventional central heating system is not there, a direct hot water cylinder can be used. In this type of system, the cylinder heats up the water in it. Any other heating appliance, like a boiler or solar panel, is not used inside the cylinder. An immersion heater which heats the water is inside it. Some cylinders may even have multiple immersion heaters so that heating can be achieved more quickly and more hot water can flow through them at a time. These can either be vented or invented, and the choice of selection can depend on a user.
- Indirect cylinder – An indirect hot water cylinder can provide hot water more quickly compared to a direct cylinder because heat is supplied to them from an external source. They can be typically thought of as to be a boiler and can also have a solar panel installation in it. There is also a heat exchanger within the cylinder that transfers heat to the water. Some types of indirect cylinders also come with immersion heaters that can help in delivering more heat to the heated water that comes from a boiler.
After taking a look at all these types of hot water cylinders, it can be very easy for a customer to decide on purchasing a product.