The way we control the speed of fan motors or pump motors has tremendously changed in the past two decades with the introduction of variable-frequency drives (VFDs), aka variable-frequency controllers ...

A new variable-speed fan drive system with gearbox from Horton and Hub City provides more efficient cooling for rear-engine buses and motor coaches with side-mounted cooling modules, Horton has ...

Fans are often used to ventilate agricultural buildings. Adjoining rooms with connecting air paths through open doors or manure channels can operate as a single room with a common negative pressure.

N C Machinery is a venerated, Anchorage-based company. Its Power Systems Division supplies and services rental generator sets, primarily to Washington and Alaska. It maintains 18 support facilities in ...

Designed for high-pressure applications, such as CNCs and edgebanders, Oneida Air’s Smart Boost dust collectors combine variable speed fan motors with the separation performance of a cyclone. Powered ...

The SmartFan Stratus variable-frequency drive provides variable-speed control of single- and three-phase fans, motors, and pumps. The microprocessor-based device operates from a 115- or 230-V ...

These AC drives adjust motor speed to the required flow of air or fluids, reducing energy costs by 50 percent. Both the Alivar 212 and S-Flex feature electronic motor controls that reduce mechanical ...

The Super Vac VR3 is a variable speed, electric, positive pressure fan evolved from the popular VR2 model. The VR3 is the only variable speed fan in the industry that will run on any 15 amp GFCI ...

Fan operation can significantly affect fuel economy. BorgWarner this year started offering its electronic Visctronic viscous variable-speed fan drives as optional equipment for Freightliner Cascadia ...

Over the past 10 years, vendors have simplified maintenance for computer room air cooling and heating systems with new motor types, fewer moving parts, reduced humidifier requirements and more sensors ...

I've got a 120mm 120VAC fan I've been using as a desk fan, plugged directly into mains with a lamp cord. (Note for non-US readers: mains here is 120VAC, 60Hz, so I am using it at its rated specs.) I ...

Contrary to popular belief, fan speed settings aren’t always correct from the factory. It’s been a long-standing assumption that you should use the high-speed tap for cooling and low-speed tap for ...