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Ed Janowiak is ACCA's Manager of HVAC Design Education and can be reached at ed.janowiak@acca.org or 703-824-8878.
Why do I use the indoor design condition of 75 degrees at 50% relative humidity? Find the answer with Manual S and Manual J in this edition of “Hey Ed!”
Want to find the minimum velocity in a duct system? Find out how to use Manual D to find the minimum in this edition of “Hey Ed!”
Want to evaluate a system’s refrigerant charge without connecting any gauges? Find out how to wet-bulb for evaluation in this edition of “Hey Ed!”
Want to know what Oil Slugging is? Find out about compressors and oil backflow in this edition of “Hey Ed!”
What exactly is friction rate? Learn where to find the calculation rate in this edition of “Hey Ed!”
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Finding the correct pressure drop is often made up rather than looked up. Ed Janowiak explains this issue and offers a solution in this blog.
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This introduction to static pressure discusses the basic elements of vital measurements and how they can be used. You can quickly identify HVACR equipment in new or like-new condition with airflow problems. This can save you a warranty call for a burned-out motor or maybe a callback for a poorly performing duct system (or incorrect fan speed setting).
In this edition of “Hey Ed”, Ed discusses why the air coming out of the vent is so much louder […]
In this edition of “Hey Ed”, Ed discusses which is heavier – dry or damp air in Manual P.
In this edition of “Hey Ed”, Ed discusses if furnaces dry out the air in Manual P.
In this edition of “Hey Ed”, Ed discusses if there is one measurement we can take, truly giving us an […]
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Over the next few months, Ed Janowiak will cover topics about measuring airflow, focusing on airflow measurements and how important it is to follow “the rules.” This month, he’s covering static pressure measurement.
In this edition of “Hey Ed”, Ed discusses where a drip leg is meant to be installed.
In this edition of “Hey Ed”, Ed discusses how important a drip leg is for a gas line.
In this edition of “Hey Ed”, Ed discusses what the deal is with rusty flue pipes when talking about system […]
In this edition of “Hey Ed”, Ed discusses if condensate is always trapped or not.
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Do you like the sun shining on your face on a cold winter morning? ACCA’s Ed Janowiak does, but that’s not the case on a hot summer day. Strategies like opening the blinds to take advantage of the free BTU’s in the winter, and pulling the blinds closed to keep the sun out in the summer are great ways to stay shady. But, do these strategies help to get more run time out of your system?
In this edition of “Hey Ed”, Ed discusses what integrity means with a drain trap.
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