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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

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

Impacts of Decreasing Evaporator Airflow

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

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

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

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

Compressor Failure Diagnostic Checklist

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

Confirming Liquid Levels with a Little Thermodynamics

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

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

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,

What Should My Superheat Be?

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

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