CYLINDERS

A water heating masterpiece

Warmflow Hot Water Cylinders, UK, Ireland, Northern Ireland Banner

The ideal choice of mains pressure hot water cylinders.  The cylinder range from Warmflow has been designed to satisfy the hot water needs of even the most demanding consumer. 

About our Cylinders

We have focussed our attention on ensuring the largest hot water volumes, shortest heat up times and lowest possible heat losses are achieved throughout our range of KIWA approved unvented cylinders

  • 1 of the top 3 performing cylinders in the UK
  • Efficient coil-in-coil design   
  • Indirect, Twin Coil & Triple Coil
  • Direct and Eco Direct models
  • Volumes from 90 - 300 litres
  • Seamless Welding
  • Duplex Stainless Steel construction
Warmflow Hot Water Cylinders, UK, Ireland, Northern Ireland Product

A thicker layer of high quality polyurethane insulation is used in the manufacture of our cylinder range, producing amongst the lowest fully certified heat loss levels currently on the market, saving precious fuel and reducing carbon dioxide emissions. 


Warmflow insulation is also CFC/HCFC-free, has a zero Ozone Depletion Potential (ODP) and a Global Warming Potential of only 2. 

Direct / Indirect explained

Direct cylinders are electrically heated and designed for instances where the use of fossil fuels is impractical / unavailable. 

Indirect cylinders are heated by a boiler, which heats water before passing it through a coil of the cylinder.

Explore our Cylinder Range

Warmflow Hot Water Cylinders, Triple Coil Unvented hot water cylinder UK, Ireland, Northern Ireland Product

Triple Coil Unvented

Seamless welding, duplex stainless steel, efficient coil-in-coil design - The Warmflow triple coil vented cylinder is one of the top performing cylinders in the UK.

Warmflow Hot Water Cylinders, Twin Coil Unvented hot water cylinder UK, Ireland, Northern Ireland Product

Twin Coil Unvented

Our Twin Coil models have all the features and benefits of the Indirect models but come with an additional coil for use with a renewable heat source, or an additional boiler.

Warmflow Hot Water Cylinders, Eco Direct Unvented hot water cylinder UK, Ireland, Northern Ireland Product

Eco Direct Unvented

The Eco Direct is the Twin Coil equivalent for electric hot water installations. It features two immersion heaters intended for use in the same manner as those of a Direct cylinder, but also has an indirectly heated coil for use with a renewable resource, such as a solar thermal system. 

Warmflow Hot Water Cylinders, Indirect Direct Unvented hot water cylinder UK, Ireland, Northern Ireland Product

Indirect Unvented

Available in six sizes from 120 to 300 litres to suit the vast majority of domestic installations, our Indirect models are the core of our cylinder range. Thanks to our large suraface area and high performance heat exchanger coils, the indirect models boast impressive heat up times - the 180 litre model taking just 25 minutes to reach 60ºC from cold.

Warmflow Hot Water Cylinders, Direct Unvented hot water cylinder UK, Ireland, Northern Ireland Product

Direct Unvented

The electrically heated Direct cylinders are designed for instances where the use of fossil fuels is impractical / unavailable. Featuring two immersion heaters*, one heating the entire cylinder volume and the other heating a boost volume at the top, the cylinders are able to make use of the Economy 7 tariff in order to minimise the cost of hot water.

Need help with one of our products?

Find the solution to your problem in our dedicated support section.

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Support - Warmflow