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 ... Looking for an outdoor anemometer rather than an HVAC flow meter? We’ve got one made from an old electric motor, or a crazy-accurate ultrasonic ...

A variable air volume box controls the air flow to a given space. When the space is unoccupied ... A signal is then sent to the cooling and heating pumps to slow down and reduce consumption. This ...

Variable air ... HVAC ductwork, overhead pipes that route cool air to each room. These variable air volume (VAV) units regulate the volume of the cooled air to the zone by opening or closing the ...