Application Articles

28 articles found.

  1. Fan Applications: An Analysis of Induced Flow Laboratory Exhaust Fan Systems and the Benefit of AMCA 260 Certified Performance FA/128-12

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    Independent third party verification of ventilation system components is valuable in ensuring performance and safety. This is especially true for critical lab exhaust systems. Air Movement and Control Association (AMCA) International Inc. certifies induced-flow...
    April 6th, 2012

  2. Fan Applications: Performance Coatings for Ventilation Products (FA/110-04R5)

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    Coatings are a very important consideration when meeting the requirements of a particular application. Coatings are primarily required because of corrosive environments and/or for a decorative appearance. Greenheck Fan Corp. supplies an extensive range of high...
    June 30th, 2011

  3. Fan Applications: Measuring Belt Tension (FA/127-11)

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    This article discusses several methods for measuring the belt tension for V-belts commonly used in HVAC applications. Tensioning the belt is often done during initial startup and periodically throughout its life for preventative maintenance. Common belt tensioning...
    February 11th, 2011

  4. Fan Applications: Seismically Rated Fans (FA/125-10)

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    When a project calls for seismically rated equipment, there are a number of code requirements that need to be considered. This article outlines the methodology of the seismic certification process and considerations involved to properly determine the need for...
    December 8th, 2010

  5. Fan Applications: Fan Applications (FA/126-08)

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    There are many different types of fans and many applications in which they can be used. For an application to be successful and work as intended, the fan and system must be compatible both structurally as well as from a performance standpoint. This section...
    July 28th, 2009

  6. Fan Applications: Spark Resistant Construction (SRC) (FA/116-08R)

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    One of the critical uses for ventilation equipment is the movement of potentially explosive gases. Engineers and designers who specify these systems must exercise caution when selecting equipment to ensure continuous and safe system operation. This article...
    November 1st, 2008

  7. Fan Applications: Variable Volume Laboratory Systems, an Overview (FA/124-05)

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    Typical Variable Volume Exhaust Laboratory On a variable volume laboratory exhaust systems; air is exhausted through fume hoods, as well as a through general exhaust grille(s), using a laboratory exhaust fan system. One of the goals of the exhaust fan system...
    July 25th, 2005

  8. Fan Applications: Are Bearing Currents Causing Your Motor Failures? (FA/117-03)

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    Are Bearing Currents Causing Your Motor Failures? “We just lost another motor! Why are all of our motors failing?” Does this sound familiar? If you’re at a loss to explain why your motors seem to experience premature failure one after another, take a step back...
    January 22nd, 2004

  9. Fan Applications: Radiated Sound (FA/122-03)

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    Radiated sound is a very important consideration in the selection and application of fans. In spite of this, radiated sound continues to be one of the most misunderstood topics in the air handling industry. This is the third article in a series of four articles...
    January 22nd, 2004

  10. Fan Applications: Sound Criteria, Attenuation Techniques and Preventive Measures to Limit Sound Problems (FA/123-03)

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    Sound is a very important consideration in the selection and application of fans. If not properly evaluated, fan sound can turn an otherwise completely acceptable application into a disaster. In spite of this, fan sound continues to be one of the most misunderstood...
    January 22nd, 2004

  11. Fan Applications: Centrifugal Fan Arrangements (FA/119-03)

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    Centrifugal fans are typically offered in several arrangements, or in other words, the position of the motor relative to the fan. When deciding on the best arrangement of a fan there are three main criteria which may influence your choice: 1. Fan performance...
    October 1st, 2003

  12. Fan Applications: Fan and System Troubleshooting - A Guide to Characteristic Field Problems (FA/118-03)

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    Modern day technology provides many tools for accurate and reliable fan and system design. Gone are the days when cheap energy allowed the use of "rules-of-thumb" and large safety factors to be part of the design process. However, even with modern technology,...
    October 1st, 2003

  13. Fan Applications: The Basics of Fan Sound (FA/121-03)

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    Fan sound is a very important consideration in the selection and application of fans. In spite of this, fan sound continues to be one of the most misunderstood topics in the air handling industry. In an effort to provide a better understanding and point of...
    October 1st, 2003

  14. Fan Applications: Understanding the Development of Fan Sound Data and the Product Rating Process (FA/120-02)

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    Sound is a very important consideration in the selection and application of fans. If not properly evaluated, fan sound can turn an otherwise completely acceptable application into a disaster. In spite of this, fan sound continues to be one of the most misunderstood...
    October 29th, 2002

  15. Fan Applications: An Outline for Successful Fan Selections (FA/112-02)

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    This article outlines the considerations involved to properly select, apply and control fans. Emphasis is placed upon matching the fan equipment to the requirements of the system from several different perspectives. However, specific fan design and construction...
    October 1st, 2002

  16. Fan Applications: Multiple Fan Systems - Fans in Series and Parallel (FA/115-02)

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    In most fan systems a single fan is selected for the required system design rating. Various methods of control are employed such as dampers, variable inlet vanes, variable pitch blades or variable speed to meet other operating points defined by the system duty...
    October 1st, 2002

  17. Fan Applications: Field Testing Overview (FA/114-02)

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    This article provides an overview of field testing and how the principles contained in AMCA 203, Field Performance Measurement of Fan Systems, can be applied. (The AMCA publications described in this article may be obtained from www.amca.org. ) The purpose...
    March 1st, 2002

  18. Fan Applications: Motor Application Guide for Ventilation Products (FA 113-01)

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    The evaluation of a fan's motor is a time consuming part of the design of air handling equipment. Selection of the proper electrical characteristics and construction features can involve factors not known to everyone. The purpose of this article is to aid in...
    December 1st, 2001

  19. Fan Applications: High Temperature Exhaust (FA/109-01)

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    "Many are never used; some are used just once; others are used all the time." What are they? They're high temperature exhaust fans. High temperature exhaust fans can be grouped into two general categories: emergency smoke evacuation and process ventilation....
    June 15th, 2001

  20. Fan Applications: Balance, vibration, and vibration analysis (FA/108-00)

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    There are many factors that can have a substantial effect on the vibration level of air movement equipment; such as wheel balance, rotational speed, drive components, motor operation and wiring. Providing equipment that operates well within acceptable vibration...
    February 26th, 2001

  21. Fan Applications: A Guide to Explosion Resistant Disconnect Switches for Ventilation Products (FA/107-00)

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    This article addresses the mounting and wiring of two types of explosion resistant disconnect switches. Explosion resistant disconnect switches are a recommended and necessary safety feature for every fan operating in a hazardous environment. Mounted directly...
    December 1st, 2000

  22. Fan Applications: A Guide to Disconnect Switches for Ventilation Products (FA/106-00)

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    Fan-mounted disconnect switches are a recommended and necessary safety feature for every fan. Mounted directly on the fan, within sight and reach, disconnect switches provide the best protection against accidental startup during service or inspection. Disconnect...
    June 1st, 2000

  23. Fan Applications: Inlet Pressure Correction (FA/105-00)

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    A fan rating consists of five different interdependent variables - flow rate, pressure, speed, power and density. However, it isn¹t always recognized that flow rate and density are based upon fan inlet conditions. When the inlet pressure exceeds 10 inches in...
    May 1st, 2000

  24. Fan Applications: Fan Discharge and Throw Information (FA/104-00R)

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    The following information provides general guidelines for selection and placement of fans used for air circulation and personnel cooling. The first subject that the designer must address is what velocity of air will provide personnel comfort in the working...
    April 1st, 2000

  25. Fan Applications: Understanding Bearings for the Fan Industry (FA/103-00)

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    Bearings are one of the most critical components in the operation of a fan and careful consideration must be given to the selection of the appropriate bearing for each application. Fan manufacturers that have comprehensive product line ranging from small light...
    April 1st, 2000

  26. Fan Applications: Understanding Temperature and Altitude Corrections (FA/102-99)

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    The most common influences on air density are the effects of temperature other than 70°F and barometric pressures other than 29.92 caused by elevations above sea level. Ratings found in fan performance tables and curves are based on standard air. Standard...
    April 1st, 2000

  27. Fan Applications: Understanding Fan System Effects (FA/101-99)

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    The air moving industry uses a common term to describe certain inlet and outlet conditions that adversely affect fan performance. The term used is "system effect". Perhaps the term should be "fan installation effect", because system effect results from the...
    March 1st, 2000

  28. Fan Applications: The Basics of Fan Performance Tables, Fan Curves, System Resistance Curves and Fan Laws (FA/100-99)

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    Engineers and designers who select and specify fans should have a good basic knowledge of the content of this article. An understanding of these subjects is vital for verifying the original fan selection, trouble shooting after the installation, and understanding...
    December 1st, 1999

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