In the 1990s, HVAC ducting began a transition from functional to fashionable. The reasons are easy to understand; the age of designer goods had arrived, and improved construction materials simply looked too good to hide.

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Since Y2K, that trend has deepened. In the late ’80s and ’90s, air-con systems were often an added afterthought encountered in revamped clubs, bars and restaurants. In the 21st century, however, they are incorporated into building design from the outset. In addition to a contemporary feel, suspended spiral duct in new hypermarkets, warehouses and exhibition spaces is both an enormous cost saving and removes many obstacles to energy-efficient operation.

Here are just a half dozen of the key advantages of modern spiral ductwork.

Efficiency

If warmed, cooled and filtered air leaks from its conduits, it isn’t difficult to understand why it will be inefficient, costly to run, and prone to breakdowns. Early HVAC …