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.

His experiments in air duct flow measurements, which previously delved into ultrasonic flow measurement, led him to try mechanical means. That calls for some kind of turbine producing a signal ...

Clean ducts allow air to flow more freely, which can reduce strain on your system and lower your energy bills. If you or ...

One-dimensional duct showing control volume ... the difference between the pressure sensed by the Pitot tube and the pressure of the surrounding air flow, it can give a very accurate measure of the ...

An air duct between the air filter housing and the throttle body; Between two rubber or plastic air filter housing ducts or ...