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    David Richardson/NCI
    Interior Hvac Diagram
    Interior Hvac Diagram
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    Interior Hvac Diagram
    Interior Hvac Diagram
    David Richardson/NCI
    If you know what to look for, a visual inspection provides clues to unsafe operation. It's never good for one package unit to exhaust into the economizer of an adjacent unit.
    If you know what to look for, a visual inspection provides clues to unsafe operation. It's never good for one package unit to exhaust into the economizer of an adjacent unit.
    If you know what to look for, a visual inspection provides clues to unsafe operation. It's never good for one package unit to exhaust into the economizer of an adjacent unit.
    If you know what to look for, a visual inspection provides clues to unsafe operation. It's never good for one package unit to exhaust into the economizer of an adjacent unit.
    If you know what to look for, a visual inspection provides clues to unsafe operation. It's never good for one package unit to exhaust into the economizer of an adjacent unit.
    National Comfort Institute
    Before you jump on the heat pump bashing bandwagon, look at your duct installation practices first.
    Before you jump on the heat pump bashing bandwagon, look at your duct installation practices first.
    Before you jump on the heat pump bashing bandwagon, look at your duct installation practices first.
    Before you jump on the heat pump bashing bandwagon, look at your duct installation practices first.
    Before you jump on the heat pump bashing bandwagon, look at your duct installation practices first.
    Contracting Business/Kelly L Faloon
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    Contracting Business/Kelly L Faloon
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    Contracting Business/Kelly L Faloon
    Ahr2023 Nate
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    The Best of Rob 'Doc' Falke

    Aug. 4, 2010
    Sometimes the best way to learn something is to dive in and get your hands dirty. Rob 'Doc' Falke has been sharing his industry knowledge and expertise through his technical articles in the Hotmail newsletter for several years

    Sometimes the best way to learn something is to dive in and get your hands dirty. Rob ‘Doc’ Falke has been sharing his industry knowledge and expertise through his technical articles in the Hotmail newsletter for several years. His articles give contractors a ‘hands on’ approach to solving issues like balancing a zoned system to exhaust fan pressure measurement. Click below to get access to some of the best of Rob’s past articles.

    Heat Pump Mysteries

    How to Catch Fall IAQ Opportunities

    Exhaust Fan Pressure Measurement

    How to Check Duct System Size

    Measuring Fresh Air With a Thermometer

    Is Green Closing In On You?

    Balancing a Zoned System

    How To Measure Residential Hydronic Heating System Btu

    Build Safety Clauses into Your Proposals

    Oversized and Underperforming Equipment

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    AscentXMedia/iStock/Getty
    The faster you drive, the more air hits your arm. Air IS heavy.
    The faster you drive, the more air hits your arm. Air IS heavy.
    The faster you drive, the more air hits your arm. Air IS heavy.
    The faster you drive, the more air hits your arm. Air IS heavy.
    The faster you drive, the more air hits your arm. Air IS heavy.