Vented and unvented hot water cylinders are two types of systems used for supplying hot water to homes. Both systems have their advantages and disadvantages, and the choice between them depends on various factors such as the size of the property, the number of occupants, and the existing plumbing system.
Vented hot water cylinders are an older technology and are usually found in older homes. They work by using a large tank that is connected to a boiler or immersion heater. The water in the tank is heated by the boiler or immersion heater and then flows through gravity-fed pipes to the taps and showers. Because vented systems rely on gravity to deliver hot water, they require a cold water storage tank usually located in the loft or attic of a property.
Unvented hot water cylinders, on the other hand, do not require a cold water storage tank. Instead, they rely on mains pressure to deliver hot water to the taps and showers. Unvented systems are usually more efficient as they don't suffer from heat losses due to the requirement of a secondary water storage tank. Additionally, unvented systems can provide better flow rates than vented systems, especially in properties with multiple bathrooms.
However, one drawback of unvented systems is that they require high water pressure, which may not be available in all areas or properties. Additionally, unvented systems must be installed and maintained by a qualified professional due to the safety implications of operating at high pressure.
In summary, vented hot water cylinders are suitable for smaller properties with low water consumption, while unvented hot water cylinders are often a better option for larger properties with higher water demand. Ultimately, the decision between vented and unvented systems will depend on your specific needs, circumstances, and budget.
