Unvented Cylinders


Tempest Heat Pump Powered by Mixergy® cylinders provide a smart, connected and flexible hot water storage solution. Designed for use with an air or ground source heat pump as the main heat source, they maximise energy efficiency by only heating the water you need. The cylinders are manufactured from Duplex stainless-steel and feature a purpose-designed coil with a 3.3m² surface area to allow maximum heat transfer of renewable energy into the stored water.
Unvented Cylinders

Telford high-performance unvented hot water storage cylinders are manufactured in the UK from premium quality Duplex stainless-steel which provides superior corrosion resistance. All cylinders are supplied with 316L grade stainless-steel 22mm compression fittings, for ease of installation and 22mm primary coils with increased surface area for quick recovery.
Carrying a lifetime warranty*, cylinders are available in capacities of 90-500 litres for indirect, direct, heat pump, solar and twin coil applications. Pre-plumbed, horizontal and slimline options are also available, together with a competitively priced bespoke service with fast turnaround times.