WH Cylinders manufacture a full range of KIWA and G3 compliant unvented domestic hot water cylinders in our purpose built facility in Manchester England. Years of experience and knowledge goes in to every single product we produce ensuring only the highest quality products reach our customers.

Our standard unvented cylinders operate at a working pressure of 3 bar gauge however we can manufacture unvented hot water cylinders for higher working pressures of 4 bar, 5 bar, 6 bar or higher if required.

To view more information on each of our products please select from the table below.

Stainless SuperFlow

World Heat EcoSlim Unvented Cylinder in stainless steel, showcasing its slimline design.

Twin Coil SuperFlow

Twin Coil Unvented Cylinder

ClimaCyl Heat Pump

Unvented Heat Pump Cylinder

EcoSlim Unvented

World Heat EcoSlim Unvented Cylinder in stainless steel, showcasing its slimline design.

Ultra Slim Unvented

World Heat EcoSlim Unvented Cylinder in stainless steel, showcasing its slimline design.

Unvented Components

WRAS approved unvented cylinder components and safety kits

Pre-Plumbed

World Heat Climacyl pre-plumbed packaged hot water cylinder for Mitsubishi Electric heat pump systems, with integrated controls and pipework.

Horizontal Unvented

Horizontal unvented hot water cylinders for loft or restricted height installations.