Measuring air flow in an HVAC duct can be a tricky business. Paddle wheel and turbine flow meters introduce not only resistance but maintenance issue due to accumulated dust and debris.

This discovery of natural '"zero energy" flow control by an international research ... engineers design more efficient chemical reactors, air purification systems, heat exchangers, hydraulic ...

The command center operates like air traffic control for resources and patient flow, through a complex hospital system. It started in 2017, as a more efficient way to coordinate care at OHSU ...