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HVAC School - For Techs, By Techs

Apr 27, 2018

In this short episode, we replace a dirty "M" word (mold) with another "M" word (moisture) that gets to the root of the problem.

"Mold" and "mildew" can freak out your customers. For years, I've refrained from saying "mold" at my own company and trained my techs to avoid it AND "mildew." Instead, we have called...


Apr 24, 2018

Here is part 2 of the discussion with Trevor Matthews about the causes and prevention of air conditioning and refrigeration compressor failure.

Slugging occurs when the compressor attempts to compress oil or liquid refrigerant. A telltale sign of slugging is valve plate damage. On a semi-hermetic compressor, you can...


Apr 20, 2018

In this short podcast, we start the conversation about "Energy? Compared to What?" and explore several energy comparison examples.

When we think about energy, we can confuse some terms. For example, temperature and heat are related but NOT synonymous. Temperature is an average measurement of heat energy; when...


Apr 17, 2018

In today's podcast, we talk with Trevor Matthews with Emerson. He tells us about the causes and prevention of air conditioning and refrigeration compressor failure.

Most compressors don't die a natural death... they're murdered. Of course, that's to say that installation and maintenance play a major role in the...


Apr 12, 2018

In today's podcast episode, we talk with system and duct design educator Jack Rise about ACCA Manual J load calculation and Manual S system selection.

Many people know about Manual J, but relatively few techs follow it properly. When people attempt to do Manual J calculations, many of them go wrong when they...