In 1974 Heuch was selected to design a refrigerated ice bank air conditioning system to maintain a constant temperature in the equipment shelters of the Darwin Mt Isa Microwave Telephone System.

We utilised an ice bank storage to nullify the extreme ambient temperature of the locality which had to accomodate around 32 degrees’ ambient temperature and humidity level of around 85%.

The interior capacity of the equipment shelters also had to have an even temperature distribution and so a fan based system was utilised to ensure even circulation throughout the refrigeration system.

To further assist with the refrigerated ice bank air conditioning system we added a level of insulation using a urethane foam which, at the time, was a better insulator then the commonly used fibre glass.

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