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Traditional With A Twist

HotHead hot water cylinders combine a traditional approach to hot water storage with an innovative new internal heat exchanger (patent pending) designed to encourage thermal stratification in the stored water, providing the user with a faster response to their hot water demands.

The funnelled heat exchanger transfers the heat supplied to hot water cylinders through a highly efficient finned coil to a reduced volume of water, delivering fast hot water by increasing its temperature faster before encouraging it to rise away from, and drawing cooler water into, the heat exchange area by using the natural difference in buoyancy between hot and cold water.

Copper Industries HotHead Internals

The funnel then guides the water directly to where it can be extracted by the consumer and prevents it from being cooled down through mixing with the rest of the water in the cylinder.

The high efficiency heat exchanger coil tubing used in our hot water cylinders has been certified

Up to:



and is suitable for use with a number of glycol and antifreeze mixes commonly used in renewable technology applications.

HotHead hot water cylinders are manufactured to the same high quality standards as all of the other products in our range and, as with the rest of our products, fully customized HotHead cylinders can be made available on request. All of our products come with aftersales support.

Why Choose a Stratifying Cylinder?

Decreases the start-up and recovery thermal response times of the installed system

Reduces stored energy losses

Compact Heat

The heat exchanger inlet temperature is kept as low as possible, increasing the efficiency of the system

Why Choose Copper?

Recycled copper meets 42% of the European copper demand, using only 15% of the energy required in extracting new raw materials, making it sustainable, environmentally friendly and the most recycled plumbing material available today.

Copper also has a long and established history of being used in conveying clean, safe drinking water because of its natural antibacterial properties and inherent health benefits making it a well trusted, tried and tested material for water supply and storage. The presence of copper ions destroy potential Legionella harbouring bacteria responsible for Legionnaires’ disease, making your water clean and safe to drink.

(Adapted from: UK Copper Board)

Copper is a well-known, trusted, corrosion resistant. With great benefits.


Recyclable material
Heart icon Health benefits


HotHead start-up responses chart

Start-up responses HotHead™ vs Conventional non-stratifying cylinder

Energy collection from a 12 tube evacuated tube collector under constant irradiation HotHead™ vs Conventional non-stratifying cylinder


Solar Heat
Max. work
Boiler Heat
Max. work
HH 135 1.5 Bar 135 Ltrs 1200 x 400mm 1/2 3.50 Bar 3.50 Bar 135 Ltrs
HH 148 1.5 Bar 148 Ltrs 1300 x 400mm 1/2 3.50 Bar 3.50 Bar 148 Ltrs
HH 160 1.5 Bar 160 Ltrs 1400 x 400mm 1/2 3.50 Bar 3.50 Bar 160 Ltrs
HH 172 1.5 Bar 172 Ltrs 1500 x 400mm 1/2 3.50 Bar 3.50 Bar 172 Ltrs
HH 209 1.5 Bar 209 Ltrs 1800 x 400mm 1/2 3.50 Bar 3.50 Bar 209 Ltrs
HH 168 1.5 Bar 168 Ltrs 1200 x 450mm 1/2 3.50 Bar 3.50 Bar 168 Ltrs
HH 184 1.5 Bar 184 Ltrs 1300 x 450mm 1/2 3.50 Bar 3.50 Bar 184 Ltrs
HH 200 1.5 Bar 200 Ltrs 1400 x 450mm 1/2 3.50 Bar 3.50 Bar 200 Ltrs
HH 216 1.5 Bar 216 Ltrs 1500 x 450mm 1/3 3.50 Bar 3.50 Bar 216 Ltrs
HH 264 1.5 Bar 264 Ltrs 1800 x 450mm 1/3 3.50 Bar 3.50 Bar 264 Ltrs
HH 203 1.5 Bar 203 Ltrs 1200 x 500mm 1/2 3.50 Bar 3.50 Bar 203 Ltrs
HH 223 1.5 Bar 223 Ltrs 1300 x 500mm 1/2 3.50 Bar 3.50 Bar 223 Ltrs
HH 242 1.5 Bar 242 Ltrs 1400 x 500mm 1/3 3.50 Bar 3.50 Bar 242 Ltrs
HH 261 1.5 Bar 261 Ltrs 1500 x 500mm 1/3 3.50 Bar 3.50 Bar 261 Ltrs
HH 300 1.5 Bar 300 Ltrs 1800 x 500mm 1/3 3.50 Bar 3.50 Bar 300 Ltrs

All of our cylinders can be customized to suit your needs. As well as our award-winning range of products, we also offer a custom 3D CAD design service allowing your exact specifications to be met.