Collection: Unvented Hot Water Cylinders

An unvented hot water cylinder stores heated water under mains pressure, delivering strong and consistent flow rates to multiple outlets without the need for a cold water storage tank. These systems are commonly used in residential and commercial installations requiring higher pressure performance.

Yes. In the UK, unvented cylinders must be installed by a G3-qualified engineer in accordance with Building Regulations. Proper installation ensures safe operation, pressure control and compliance with regulatory requirements.

Unvented systems provide mains pressure hot water, improved shower performance and the ability to supply multiple outlets simultaneously. They eliminate the need for loft-mounted cold water tanks and are often preferred in modern commercial and high-demand environments.

Unvented cylinders include built-in safety components such as expansion vessels, pressure relief valves and temperature control devices. These features regulate internal pressure and maintain safe operating conditions.

Yes. Unvented cylinders are widely used in offices, hospitality settings, healthcare facilities and retail environments where reliable mains pressure hot water is required across multiple outlets.

Cylinder sizing depends on the number of outlets, simultaneous usage demand and incoming mains pressure. Larger capacities are required for higher demand applications, particularly where multiple bathrooms or wash stations operate at once.

Regular servicing is recommended to ensure continued safety and performance. Annual checks typically include inspection of pressure relief valves, expansion vessels and safety controls.