Orange Heating Supplies comprehensive range includes trusted brands such as UK Cylinders, Joule, Telford, Heatrae Sadie, Main and Gledhill. Available in a range of sizes from 90 litres to 500 litres, ensuring you find the perfect hot water cylinder for your specific requirements.
Unvented cylinders offer an efficient and reliable hot water solution by providing high-pressure water directly from the mains supply. Unlike vented systems, they don’t require a cold-water storage tank, saving space and reducing the risk of contamination. These cylinders ensure strong water pressure for multiple outlets simultaneously, making them ideal for modern homes.
Explore our range of reliable unvented hot water cylinders, available in a variety of sizes and specifications for domestic and commercial heating systems.
Trusted Manufacturers
Choose from established cylinder brands known for reliable performance, durable construction and dependable hot water delivery.
A Range of Options
Find cylinders in different capacities and configurations to suit the requirements of properties and heating systems of all sizes.
Expert Product Support
Our knowledgeable team can help you compare products and select the right cylinder for your installation requirements.
Unlike traditional vented systems that rely on gravity, an unvented system pushes hot water out using the natural pressure of your incoming mains. The system relies on a few core components:
Inner Tank
Often crafted from duplex stainless steel to handle the high pressure and resist corrosion.
Thermal Insulation
A thick layer of foam keeps the water hot and prevents energy loss.
Heating Element / Coil
Water is heated indirectly by your central heating boiler or heat pump (via an internal heat exchanger coil) or directly using a built-in immersion heater.
Safety Controls
Because it’s a sealed system under pressure, unvented cylinders feature safety valves (like temperature and pressure relief valves) that safely release excess pressure or heat.
Unvented cylinders are available in several configurations, allowing you to choose a system that works with your property’s heating source, available space and hot water requirements.
Unvented cylinders provide a reliable supply of stored hot water directly from the mains, making them a practical choice for modern homes and commercial properties with higher hot water demands.
Mains-fed operation delivers strong, consistent water pressure across multiple taps and showers without requiring a separate cold-water storage tank.
Quality fittings support strong, consistent pipework performance and help keep heating systems professionally finished.
With no loft tank required, unvented cylinders can be installed in various locations and connected to boilers, heat pumps or immersion heaters.
Orange Heating Supplies supports homeowners, self-employed heating engineers and larger companies with trusted products, system components and practical advice. Visit us in store or contact the team to ask about availability, supplier ranges and the heating products we can provide.
