Sheet Metal & Air Conditioning Contractors’ National Association


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SMACNA Bubble DVD Destroys Design Myths


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The Bubble Video—so called because it uses helium-filled bubbles to visually illustrate airflow through a duct system that is fitted with a clear plastic side—has been revised in modern digital video format. The new video is available on DVD. A number of duct fittings are used to illustrate airflow movement variations through a duct system. The video also references both the SMACNA HVAC Systems Duct Design and HVAC Duct Construction Standard to tie actual airflow performance to the “flat” drawings and commentary within both manuals.

The video is intended as an educational tool for designers and engineers to illustrate how good duct design and careful planning to avoid conflicts can be used to improve airflow and reduce one of the largest energy users in commercial-class buildings—HVAC system fan power. The running time for the video is 15 minutes.