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    Quick answers to a variety of customer service, website and general company questions.

    Support

    Quick answers to a variety of customer service, website and general company questions.

    How do I know how much air (Cubic Feet per Minute (CFM)) I need to exhaust in my space?

    First, determine the suggested minutes per air change for your application type by consulting local code requirements or referencing the chart below. The ranges specified below will adequately ventilate the corresponding areas in most cases.

    AreaMin./Chg.
    Assembly Hall3-10
    Attic2-4
    Auditorium3-10
    Bakery2-3
    Bar2-4
    Barn12-18
    Boiler Room1-3
    Bowling Alley3-7
    Cafeteria3-5
    Church4-10
    Classroom4-6
    Club Room3-7
    Dance Hall3-7
    Dining Room4-8
    Dry Cleaner2-5
    Engine Room1-3
    Factory2-7
    Foundry1-5
    Garage2-10
    Generator Room2-5
    Gymnasium3-8
    Kitchen1-5
    Laboratory2-5
    Laundry2-4
    Machine Shop3-6
    Mill3-8
    Office2-8
    Packing House2-5
    Projection Room1-2
    Recreation Room2-8
    Residence2-6
    Restaurant5-10
    Restroom5-7
    Store3-7
    Transfer Room1-5
    Warehouse3-10

    Next, determine the volume of the space by multiplying the room Length X Width X Height (in feet).

    Finally, divide the room volume by the number of minutes per air change to arrive the suggested amount of exhaust air for your space.

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    How do I know what fan is best suited for my application?

    Fans all perform the basic function of moving air from one space to another, but each model has benefits for certain applications. Use one of our Find a Fan tools or contact a knowledgeable Kamfri representative for advice.

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    What factors prevent a fan from performing as specified?

    There are numerous reasons why fans may fail to perform as specified, but first it is important to understand what defines acceptable performance. According to AMCA Publication 200, a fan installed in a ventilation system should expect a tolerance of +/- 7.5% for flow (cfm). In other words, a fan which produces 1,000 cfm in a lab environment should provide a volume flow rate of 925 to 1,075 cfm when installed in a properly designed ventilation system. Volume flow rates which fall below this range are typically the results of variances in system static pressure or mechanical problems with the fan.

    Common symptoms include:

    • Obstructions in the duct system - closed dampers, closed registers, dirty filters, clogged coils
    • Obstructions in the fan inlet - elbows to close to the inlet, walls too close to the inlet
    • Duct design - improperly designed turning vanes, leaks in supply or exhaust ducts
    • Fan related - impeller running backwards, fan speed too low, impeller dirty or clogged, clearances between inlet cone and wheel cone are incorrect.

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    What is an Electronically Commutated (EC) motor?

    An Electronically Commutated motor is a brushless DC motor that allows for speed variability and can provide up to 60% energy savings. EC motors are available on Globeaire models RUD, RDD and SCD.

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    I have an old fan I need to replace. Where do I start?

    Start by visiting our Find a Fan - By Manufacturer tool to help you cross reference your existing fan to the right Kamfri or Globeaire product. Or contact a Kamfri representative for advice.

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    Once I've identified the product I want, how do I order it?

    Kamfri and Globeaire branded products are sold through distributors. Visit the Where to Buy page to find the Kamfri distributor nearest you.

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    I have a large project I'm working on. Am I able to purchase directly from Kamfri.com?

    Kamfri and Globeaire branded products are sold through distributors. Visit the Where to Buy page to find the Kamfri distributor nearest you.

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    What if I can't find exactly what I'm looking for on Kamfri.com?

    Contact one of our Kamfri representatives by visiting the Contact us page and explain what you are looking for. Our experienced ventilation experts are ready to answer all of your questions and guide to the right product for your application.

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    Are Kamfri products manufactured in Mexico?

    The Kamfri and Globeaire line of products are sourced from quality ventilation equipment manufacturers in North America and Europe. To find out where a specific item is manufactured, please contact a Kamfri representative.

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    I'm interested in selling Kamfri products. How can I become a distributor?

    Email us at info@kamfri.com to find out more about becoming a Kamfri distributor.

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