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Equipment Sizing and Airflow in Different Markets

This tech tip was heavily informed by Ed Janowiak’s past symposium presentations. You can watch his presentation about s

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What Airflow Goes Around HAS to Come Around

Have you ever woken up early on a Saturday morning and thought to yourself, “I really wish I knew how to size transfer g

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Impacts of Decreasing Evaporator Airflow

Airflow, airflow, airflow… When we set up and commission comfort cooling and heating systems, we need to pay more

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Low Airflow – Beyond the Obvious

Every now and then, a tech will call me and give me the same story of woe. They're working on a system and have the foll

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Bypass Dehumidification/Airflow HVAC Design

There have been several past posts on our Facebook group page about a concept called bypass dehumidification. I think te

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Air is Squishy – Measuring Airflow w/ Bill Spohn

Measuring airflow is easy. Measuring airflow accurately is quite a bit more difficult. In many cases, when we as technic

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Compressor Failure Diagnostic Checklist

Industry data shows that up to 40% of compressors returned under warranty have no fault found. Technicians often blame t

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Confirming Liquid Levels with a Little Thermodynamics

Maintaining the correct vapor-liquid refrigerant balance is crucial for air conditioning and refrigeration system perfor

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How to Diagnose a TXV Failure

There has been much written and many jokes made about the misdiagnosis of TXV (thermostatic expansion valves), and right

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Dedicated Dehumidifier vs. Electric Reheat Dehumidification – Who Ya Got?

This tech tip was written by Tim De Stasio. He originally published it on his website, which you can visit HERE. Thanks,

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What Should My Superheat Be?

  The most common—and often most frustrating—questions that trainers and senior techs get asked sound something lik

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3 Ways to Reduce Compression Ratio in a Heat Pump

We’ve talked about compression ratio a lot over the years. Compression ratio is the number you get when you divide the a

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