PHONE: (01892) 600121

Quick links

Bisque Gio Towel Radiator
Bisque Gio Towel Radiator

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 Gio Towel Radiator

Regular price
Sale price
Include VAT Delivery Terms, options selected at checkout.

Mirror Finish - 5 working days
Non Stock Colours and Finishes - 25- 30 working days
Guarantee - 5 Years
Electrical - 2 Years
Heat output @ ΔT=50K:
177/604 - 357/1218 Watts/BTU

SKU: GIO-90-55-9516
900x530 (GIO-90-55-9516) 27651876028516
Radiator Type: Dual Fuel
Immersion Rating:
Width: 530mm
Height: 900mm
Weight: 4.4kg
Delta 50 Watts: 177
Delta 50 BTU: 604
Postition: Vertical
1200x530 (GIO-120-55-9516) 27651875831908
Radiator Type: Dual Fuel
Immersion Rating:
Width: 530mm
Height: 1200mm
Weight: 5.8kg
Delta 50 Watts: 243
Delta 50 BTU: 829
Postition: Vertical
1500x530 (GIO-150-55-9516) 27651875897444
Radiator Type: Dual Fuel
Immersion Rating:
Width: 530mm
Height: 1500mm
Weight: 7kg
Delta 50 Watts: 303
Delta 50 BTU: 1034
Postition: Vertical
1800x530 (GIO-180-55-9516) 27651875962980
Radiator Type: Dual Fuel
Immersion Rating:
Width: 530mm
Height: 1800mm
Weight: 8.3kg
Delta 50 Watts: 357
Delta 50 BTU: 1218
Postition: Vertical

The Bisque Gio. Simple, elegant towel radiator made of stainless steel with a highly polished finish. Sizes range from 900mm x 530mm to 1800mm x 530mm

Download PDF Spec