Part 3 of four-part series: Fan System Effects In the lab, fans are tested with ideal inlet and outlet conditions: straight, uniform flow into the impeller and typically, a section of straight duct on the discharge to allow the velocity profile to smooth out and static pressure to develop. In the field, that ideal setup
Fan System Effects: Abrupt Change in Cross-Sectional Area
Part 2 of four-part series: Fan System Effects Abrupt changes in duct cross-sectional area are a frequent cause of fan system effects. When air is forced to expand or contract too quickly near a fan inlet or outlet, the flow separates, becomes turbulent, and no longer matches the smooth conditions assumed by the fan performance
Fan System Effects: What and How
Part 1 of four-part series: Fan System Effects Fan system effects are performance losses caused by poor airflow conditions at or near a fan’s inlet or outlet, such as swirl, turbulence, abrupt transitions, fittings too close to the fan, or other obstructions in the ductwork. For engineers, contractors, and specifiers, the practical issue is simple:
Cost Justification For Industrial Fans
Part 3 of three-part series: Industrial vs Commercial Fans At first glance, the upfront cost of industrial fans can seem significantly higher than that of standard commercial options. This initial investment often reflects the use of heavier-duty materials, advanced engineering, and the ability to perform reliably in demanding environments. However, focusing solely on purchase price
Why Industrial Fans are the Superior Choice
Part 2 of three-part series: Industrial vs Commercial Fans In environments where airflow isn’t just a convenience but a critical part of operations, the choice of ventilation equipment matters. From manufacturing plants and warehouses to processing facilities, the demands placed on air movement systems go far beyond what standard solutions can handle. Industrial fans are
Understanding the Differences Between Commercial and Industrial Fans
Part 1 of three-part series: Industrial vs Commercial Fans When it comes to selecting the right ventilation system for specific applications, engineers, specifiers, and contractors often find themselves weighing the benefits of commercial fans against industrial fans. While both types of fans serve the primary function of moving air, their designs, capabilities, and applications differ
What is an Electronically Commutated EC Motor?
What is an Electronically Commutated EC Motor? An electronically commutated (EC) motor is designed to run on an alternating current (AC) power supply, but it in fact bears a closer resemblance to a direct current (DC) motor. It is essentially a permanent magnet, brushless DC motor that incorporates on-board electronics. The added electronics allow an
IRIS Dampers – Technical Article
Dampers are commonly used in HVAC applications to regulate airflow within a duct or other air-handling equipment. Applications, efficiencies, power consumption, maintenance costs, and their effect on airflow vary widely. Conventional dampers typically comprise a valve, blade or plate in a frame. They are available in various types, shapes and sizes, ranging from small round
Destratification Fan Application Guide
What is a Destratification Fan? A destratification fan is a ventilation device, typically suspended from the ceiling of a commercial or industrial building. Two main purposes of this fan are to achieve energy savings and provide a more comfortable environment for occupants in a building. This is done by circulating air from the ceiling to
Fan Basics: What is a Fan?
For a quick refresher on fan fundamentals, download a PDF copy of our Fan Basics: What is a Fan?; Fan Impeller; Fan Terminology; Fan Laws; Fan Ratings; Selecting a Fan; Airflow Rate; Static Pressure; Fan Curves; Which Fan to Choose?______________________________________________________________________________________ FAN BASICS: WHAT IS A FAN? A fan is a power-driven machine used to
