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Matter, Mass, Weight and Volume
This episode covers some basics of matter that relate to HVAC/R – Matter, Mass, Weight and volume. This includes specific gravity and specific volume.
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The Why Behind the Lies
This article is written by longtime tech Shaun McCann sharing his experiences with a big problem in our trade. Thanks for this, Shaun. I started in the HVAC business working for a small commercial union shop in the late '80s. I left that job within a year and worked in the bar and restaurant business […]Read more
Relative Humidity in the Supply Air Stream
When you first start checking your supply air with a thermo-hygrometer, you may notice that the relative humidity is REALLY HIGH. Often, the RH in a supply duct will be between 85% and 96% relative humidity on a system that is functioning as designed. The reason for this is fairly simple: In order for dehumidification […]Read more
A Tale of Two Latents
When the quiz or the teacher asks what “latent” heat is, there is generally some reference to it being hidden heat, which is what the word “latent” means. We then learn that it is heat energy transferred that results in a change of state rather than a temperature change. Later on, we hear a lot […]Read more