In 1948, research by R.G. Huebscher established flow resistance for different shapes of ductwork at equal velocities, which allowed the creation of the duct-sizing calculator or “Ductulator” for ...

Air duct leakage should be a concern to both the designer and the building owner because of its potential impact on initial construction costs, energy usage, and system performance. Every duct system ...

In Spain, the bathrooms of older buildings are connected through communal ducts that allow aerosol exchanges. Although not common, it is suspected that transmission may occur in specific circumstances ...