Advantages & Disadvantages of Unvented Cylinders

It is believed by many that unvented cylinders can be more efficient, reliable, and suitable for modern homes and businesses than vented models in hot water systems. However, they’re not perfect as unvented hot water cylinder have both advantages and disadvantages.

Advantages of Unvented Cylinders

• No extra storage needed
• Versatility
• Energy Efficiency
• Consistent hot water supply

The benefits of an unvented cylinder considerably outweigh the disadvantages.

One of the main advantages is that no cold water storage tank (like a header tank) is required in the system. This means homeowners can save space.

Another key advantage of unvented cylinders is their versatility. This is achieved through the possibility of using multiple heating sources. Unvented cylinders are also more efficient than vented systems, especially when used with modern boilers or heat pumps.

Due to their high water pressure, unvented cylinders benefit from a consistent supply of hot water. This makes them suitable for homes with multiple bathrooms, as well as commercial buildings with a high hot water demand. When unvented hot water cylinders are optimised properly, the recovery time and energy efficiency ensures hot water is readily available.

Disadvantages of Unvented Cylinders

• Dependent on mains water supply
• Higher installation cost
• Requires an Expansion Vessel and other Safety Features
• Maintenance

Due to relying on the mains water supply, unvented cylinders may be unable to receive water. This is because if maintenance is not performed, or unforeseen circumstances can interrupt the water supply. Although the cost of installing an unvented hot water tank can be high. The initial cost of the cylinder itself can be higher, yet if optimised correctly, you could save money eventually.

As stated above, an unvented cylinder removes the need for a cold water tank. However, due to the high pressure, space is needed for an expansion vessel. This is one of several safety features that should be considered when installing an unvented cylinder.

While annual serving and maintenance costs can be a hindrance. However, they ensure longevity for the unvented cylinder, making them safe and compliant with regulations.

Conclusion

Despite the potential high installation cost, along with routine maintenance and dependence on a mains water supply, installing an unvented cylinder can be advantageous. This is due to them being a space-saving option, a reliable source of hot water, and their efficient performance.

Newark Cylinders specialise in manufacturing highly efficient, bespoke unvented (and vented) hot water cylinders tailored to your needs. Whether you require a custom size, multiple connections, or have unique performance requirements, our sales team can make it happen.