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Unvented Hot Water Cylinder Services & Installation

Installing an unvented hot water cylinder in your home is a popular alternative to the common combi boiler installation. The main reason for its popularity is because it’s a more efficient system for larger houses with a high demand on hot water. An unvented hot water cylinder installation involves taking the cold water supply directly from the mains water. This means that it doesn’t need to come from a gravity fed tank or need to be connected to a pump.

At NJ Harkus, we’ve installed hundreds of unvented cylinders around Cardiff but we don’t just deal with the installations. We have plenty of experience to fault find, repair and also service any systems that you already have installed. Whether you require a brand new installation, repair or service, you can get in touch with us by calling 07859 896019 or using the contact form below.

Why Use NJ Harkus

  • Plenty of experience with unvented cylinders
  • Fully qualified and insured for the job
  • One of the highest rated plumbers in Cardiff
  • We always work to the highest of standards
  • Available to work at your convenience
  • Competitive installation prices

unvented hot water cylinder


Benefits of an Unvented Hot Water System

As mentioned above, the main benefit of installing an unvented hot water cylinder is the improved efficiency in larger households that have a high demand for hot water.

However, another benefit from an unvented hot water cylinder installation is that you don’t require a cold water storage tank in your loft. Therefore, if you have limited space, it’s a great way to free-up some space.

Direct vs Indirect

If you require a brand new unvented hot water cylinder installation, you have the choice between a direct and indirect system.

The main difference between the two is that a direct system features an immersion heater inside the cylinder to heat the water. An indirect system on the other hand is heated by an external source such as a boiler.

Getting In Touch

Whether you need an instant quote for an unvented hot water cylinder installation or any other services regarding your system, you can get in touch with Nathan by calling 07859 896019. Alternatively, if your query isn’t urgent, you can get in touch using the form or via [email protected]

Request a Unvented Water Cylinder Quotation



Unvented Hot Water System


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