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Bisque Alban
Bisque Alban

The Zehnder Charleston radiator has played a key part in the Company’s success over the past 80 years.

Continuous advances in the quality of production methods and technology has kept the Charleston Multi-column at the forefront of the radiator market.

Take a look behind the scenes to discover how they are made.

High quality, using the latest technology and production methods

This is how the famous Zehnder Charleston Multi-column is made

During the first phase of production of a multi-column radiator, steel strips are wound into a coil measuring 1200mm to 1500mm in diameter and weighing over 2 tonnes. Steel tubes measuring 4 to 6 metres are used to create the radiator columns.

Production of the collector

The coils of steel are punched by a press to create the two halves of the collector. The two pieces are then welded together to form double-machined heads. These headers are then sanded and cut in half to create two collectors. These elements are then quality checked before moving onto the next stage.

Production of the section

The collectors and the tubes are now welded together and then ground to make neat joins. At each stage the sections are checked and quality controlled.

The sections are hermetically sealed and then immersed in a bath of water. Each section is then subjected to a pressure of 16 bar to check for leaks.


The radiator sections are now connected to each other using tip-welding. Further testing then checks each radiator for leaks.

After testing, the radiator is suspended ready for the next stage in production.

The finishing touches

First of all the radiators are cleaned to remove any dust and grease. Next a base coat is applied using an electrophoretic technique in order to protect against corrosion and to give a perfect base. The radiator is then placed into a furnace, baking the primer on to the steel at about 180°C.

After sufficient cooling, the radiator is moved along the production line ready for powder coating. Powder coating is much more environmentally friendly than wet painting. Standard white radiators are automatically painted, whereas all other colours and finishes are manually sprayed.

The radiator is then returned to the oven where the powder melts evenly and gives the radiator a perfect finish that is resistant to shock and heat.

Before packing, each radiator is thoroughly quality checked once again and then up to 98% of radiators are packaged and wrapped using a fully automated system.

Bisque Alban

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Mirror finish - 5 working days
Guarantee - 5 Years
Heat Output at DeltaT-50K

256 - 417 Watts

873 - 1423 BTU
Max Immersion 300 Watts

SKU: ALB-100-50-9516
1000x500 (ALB-100-50-9516) 31699534151780
Radiator Type: Dual Fuel
Immersion Rating:
Width: 500mm
Height: 1000mm
Weight: 6.6kg
Delta 50 Watts: 256
Delta 50 BTU: 873
Postition: Vertical
1380x500 (ALB-140-50-9516) 31699534184548
Radiator Type: Dual Fuel
Immersion Rating:
Width: 500mm
Height: 1380mm
Weight: 8.7kg
Delta 50 Watts: 332
Delta 50 BTU: 1133
Postition: Vertical
1760x500 (ALB-180-50-9516) 31699534217316
Radiator Type: Dual Fuel
Immersion Rating:
Width: 500mm
Height: 1760mm
Weight: 10.8kg
Delta 50 Watts: 417
Delta 50 BTU: 1423
Postition: Vertical

The rectangular version of our popular Chime has the same sparkling appeal but with a perpendicular style.  Cantilevered rails allow for even the plumpest towels to be easily slid on and off.  Great for family bathrooms, the radiator can be installed with the rails to the left or the right.  An optional supplementary heater allows the radiator to continue to offer warmth and comfort during summer months when the central heating system is not in use - look out for the BTH Supplementary Heater in the accessory section and check the radiator technical details to choose the correct size.

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