Unvented (High-Pressure) Cylinders

Craving a proper power shower or hot water that never runs short, even with multiple taps running? Unvented hot water cylinders bring hotel-style comfort to British homes – no need for a cold water tank in the loft, just high-pressure hot water on demand.

What Makes Unvented Cylinders Different?

Unlike open-vented systems, unvented cylinders use mains pressure. The result is steady, strong flow everywhere, at any time. These cylinders are fully sealed, with numerous built-in safety features – pressure relief valves, expansion vessels, thermostats, and scald protection – to keep your system safe and efficient.

Major Benefits

• Consistent high-pressure hot water: Powerful showers, fast baths, and simultaneous use throughout the house.
• No loft tank: Frees up space and eliminates risk of tank freeze or contamination.
• Faster reheat times and less heat loss: Modern insulation saves money year-round.

When Is It Time to Upgrade?

Consider a switch if your household has:

• Multiple bathrooms or high hot water demand
• A desire for powerful showers without pumps
• Older cylinders suffering from low pressure, leaks, or heat loss

You’ll notice the difference straight away – a real boost in modern comfort, potential for energy savings, and peace of mind for growing families.

Regulations and Safety

Unvented cylinders are strictly regulated and must be installed by a specialist (G3-certified). Self-certification is possible for certain engineers, but all systems must meet rigorous standards for installation, temperature, and pressure safety.

Premier’s Professional Promise

Our experienced, local engineers deliver a stress-free upgrade, from design and installation to aftercare. We prioritise safety, efficiency, and long-term reliability – never cutting corners. Trusted by communities across Berkshire and Oxfordshire, our reputation is built on honesty, support, and real results.