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Evaluating HVAC Tape Performance Under High Heat and Static Load (Part 1)
How Attic Designs Need to Account for Heat and Moisture
Why the Sauna Feels Hotter When You Throw Water on the Rocks
Preventing Heat Illnesses in the BLAZING Summer Heat
Using Heat & Nitrogen In Vacuum
Second Law of Thermodynamics
Air Flow and Ice – A Thought Experiment
An Electric Heat Mistake
The Good Old Heat Anticipator
The PATH to High Performance HVAC w/ David Richardson
The Basics of Moving Heat (Thermodynamics)
#heat
Tech Tips:
When sealing ductwork or repairing HVAC insulation, the tape you choose dictates the long-term integrity of the system. Temperatures fluctuate wildly in attics and mechanical rooms, and the tape must be able to withstand these environments without degrading. To better understand how different professional-grade adhesives actually perform under elevated temperatures, we decided to put them […]
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This tech tip was heavily inspired by one aspect of Rick Simsโs 2021 HVACR Training Symposium session titled โConductsation.โ The entire presentation is worth a watch, but the advice in โConductsationโ and this tech tip are tailored to hot, humid climates. The contents of this tech tip may NOT work for colder climates. Dr. Allison […]
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I admit it, I’m a sauna guy now. The ones at the gym are pretty gross, so I got a small one at home because I guess Iโve missed sitting in attics or something. If youโve ever sat in a traditional sauna, you know the drill: the heatโs already intense, and then you or someone […]
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This tech tip about preventing heat illnesses covers information and resources from the Cleveland Clinic, the U.S. Centers for Disease Control and Prevention (CDC), the U.S. Occupational Safety and Health Administration (OSHA), and the National Oceanic and Atmospheric Administration (NOAA). HVAC School is NOT an official OSHA training resource, and although these safety tips are […]
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In these tips and on the podcast, we talk a lot about the importance of deep vacuum. Pulling a deep vacuum using proper processes and tools is really the ONLY way to ensure that a system is clean, dry, and tight. Just for review, that means: Nitrogen purge, flow, and pressurize > Cores removed > […]
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The second law of thermodynamics puts the first law into context and establishes entropy as a concept. We can simply define entropy as a state of disorder that can only increase or remain the same in natural processes. Processes in which entropy remains the same are reversible, but ones that result in an entropy […]
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Imagine a glass of ice sitting on a table. Now, imagine you place a lid on the glass so that all the water and ice are contained in the glass. If the ice and water are well mixed, the water and ice will both be at 32ยฐF because the ice is slowly changing state from […]
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I started working as a tech when I was 17 years old, fresh out of trade school. My first winter out on my own, I went to a service call in an older part of Orlando, a part of town I had never worked in before. It was an especially cold winter that year, and […]
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As a technician, you most likely know some customers who still have an oldie thermostat (you know, those old mercury bulb things, like the round Honeywell CT87 and such). Keep in mind that those usually have an adjustable heat anticipator. If youโre newer in the field, you may not have seen or worked with those […]
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Videos:
Podcasts:
๏ปฟ๏ปฟ In this engaging session, David Richardson breaks down the concept of high-performance HVAC, offering a clear roadmap for industry professionals looking to elevate their craft. Richardson argues that the HVAC industry has long been focused on equipment rather than complete systems, leading to widespread inefficiencies. The average system delivers only about 57% of its […]
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In this episode of HVAC School, Bryan talks to some apprentices about basic thermodynamics. That is the fancy scientific way of saying that we’re moving heat. The way we think of “hot” and “cold” is relative to our comfort. However, the scientific concepts of “hot” and “cold” are veryย different from our relative understandings of those […]
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