Armacell insulation solves Belfast ducting problems 03 November 2010

Class O Armaflex materials have been selected to provide both thermal and acoustic insulation for air conditioning ductwork during a major restoration project undertaken at Belfast City Hall.

The project presented several challenges, including space as the earlier ductwork had not been designed to accommodate the thickness of modern insulation, which provides better thermal efficiency.

A second problem involved suppression of the mechanical droning sound generated by the air-handling units.

However, using 1,716m2 Class O Armaflex materials has resolved both problems. Internally lining the ductwork walls with 25mm thick Armaflex insulation ensured that energy saving targets were achieved, while noise propagation was reduced.

Armaflex also halved the insulation thickness, simplifying the installation to a single application process, further reducing both time and costs.

The internal lining of ductwork is unusual in the UK, but is established common practice in many other countries, including the USA. The Class O Armaflex insulation is 100% dust and fibre free, ensuring that it is safe to use within air ducting, without any risk of fibre migration into the air stream or the building interior.

It is also the only insulation material to feature built-in Microban anti-microbial protection, which together with the closed-cell structure lining helps prevent both bacterial and mould growth on the insulation lining. This is an essential consideration when looking to minimise the onset of harmful 'sick building syndrome', particularly where ducting has been internally lined.

Brian Tinham

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