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.

The most commonly used device is the continuous-flow anesthetic machine, which provides a steady flow of air containing a regulated supply of gas. Modern instruments often include monitors and ...

Examples would be certain varieties of stump grinders, cold planers and slot cutters. A high-flow machine would be of greatest benefit for these, because without the high flow, these types of ...