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Join us todayAlthough combi boilers are a popular choice to supply hot water in UK homes, there are many hot water tanks that can still be found in home today. Used for baths, showers, washing up, really anything that demands hot water, a hot water tank will store large amounts of hot water, so it is available when you need it. The size of the hot water tank you choose depends on how much hot water you use throughout the day. You will find most water tanks and immersion heaters in an airing cupboard or the loft, but unvented water tanks can be placed in several places around the house.
Some of the main types of hot water tanks are:
• Vented
• Unvented
• Direct
• Indirect
• Thermal Store
• Solar Tanks
Some of the most popular manufactures of hot water tanks are Worcester, OSO, Valliant, Gledhill, and Bosch.
In unvented water tanks, water is carried through the home through from the pressure supplied from the mains pressure, so a header tank is not required in the loft. Stainless steel unvented water tanks are generally manufactured for higher hot water flow rates, making them perfect for providing higher water pressure in showers.
Usually located in the loft vented cylinders use a header tank instead of mains pressure and rely on gravity to circulate water to your hot water system and heating system. They are usually made of copper.
The water in direct cylinders is heated by an internal element, such as an immersion heater, and then supplied to the intended outlet. Direct cylinders can be vented or unvented.
An indirect water tank is heated by external heat, generally a boiler, which uses an internal coil to transfer the heat from the boiler to the water inside.
Solar hot water tanks are the latest trend, specially designed for solar heating installations of all kinds. By circulating water and a special glycol liquid through pipes, the heat is transferred to the stored water via an internal coil. Sometimes, solar cylinders also contain an internal immersion heater to provide heat when solar radiation is not enough to heat the water.
A professional tradesman will charge around £120 to change an immersion heater and the heater itself can cost
between £20 and £325. Immersion heaters are fairly inexpensive and changing them is a simple and quick process. Water tanks are more costly to install and range in price from £150 to £375, depending on their size and the pipework involved.
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