BACK
One Way to Picture Superheat and Subcool
Six Tips to Help You Write an Article for HVAC School
Where Should the Float Switch Go?
Soft Lockout vs. Hard Lockout
To Glass Ceilings And Those Who Lend Us Their Hammers
Two Tips for Tough Vacuum Jobs
Is Value Perceived?
What to Do with Your Micro-Manometer
Ventilation Strategies: ERVs, Dehumidifiers, and More
When 0V Isn’t Safe – Short #242
Compressor Ohm Mistakes w/ Bert
Motor Ambient Rating – Short #241
Superheat Talk w/ JD Kelly
How to Deal w/ Too Much – Short #240
Delta T Talk w/ JD Kelly
Fire Sprinklers – Short #239
The PATH to High Performance HVAC w/ David Richardson
Nylog, Oil? Where does it go? – Short #238
#hvac
Tech Tips:
It took me years to build a picture in my head of what superheat and subcool mean. They were these strange words that dropped out of nowhere when I entered the HVAC world, and in the midst of grappling with so many other things, I could tell they were very important. Over time, I have, […]
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This tech tip was written by David Richardson, the Vice President of Training for NCI. David has been on several podcasts and has spoken at the HVACR Training Symposium multiple times. Thanks, David! Your ideas and experiences are the ingredients for great articles. Unfortunately, they are easy to forget if you donโt capture them in […]
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If you have worked at more than one company in your HVAC career, chances are youโve found there is more than one place to put a float switch. Every company seems to have its own โsecret sauceโ for running drain lines and placing float switches. Is your company a โno float switchโ company? Although a […]
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If a furnace runs for years and years while tripping the limit switch but satisfies the thermostat, will it ever be noticed? The answer is most likely โno,” but it will depend on whether the furnace utilizes soft or hard lockouts when the limit switch trips. So, what is a soft lockout vs. a hard […]
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This tech tip was written by Jennifer Manzo, an HVAC technician and the founder of the HVA-Chicks coalition, which offers tech support and training as well as resources for women in the industry. She was one of our panelists on this year’s Women’s Panel at the symposium and was recently featured on a livestream and […]
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In the last year or so, I have had a couple of puzzling experiences related to pulling a vacuum. These instances have left me with questions and clues where I thought I had given up on understanding a certain vacuum situation. Typically, if Iโve had a hard time achieving a proper vacuum, I would be […]
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The other morning, I was scrolling through HVAC Facebook groups when I came across a post from a homeowner.ย He was requesting recommendations for a book that would teach him how to design and install a new HVAC system, complete with ductwork, in his home.ย Immediately, my HVAC career flashed before my eyes like a Christian reliving […]
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Imagine this: you are pulling into your driveway from a long day at work, and you see a package waiting for you on your porch. You jump out of your truck and trip over the rose bush while running to see if this is what you have been waiting for. Upon closer inspection, you realize that the […]
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This tech tip recaps the livestream by the same name, featuring HVAC School contributors Matt Bruner and Adam Mufich, as well as special guests Corbett Lunsford and John Semmelhack. You can watch that livestream on our YouTube channel HERE, and you can learn more about the great educational opportunities Corbett has to offer at https://buildingperformanceworkshop.com/. […]
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Videos:
Podcasts:
๏ปฟ๏ปฟ In this short podcast episode, Bryan covers some unique electrical cases: when 0v isn’t safe. When you measure voltage, you’re finding out the electrical potential between two points. Just because there is 0v between one point and another doesn’t mean there will be 0v between those points and other points. Non-contact voltage detectors are […]
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๏ปฟ๏ปฟ In this episode, Bryan and Bert dive into the often misunderstood world of compressor testing, focusing on common mistakes technicians make when using ohmmeters, compressor testers, and megohm meters. The conversation highlights how diagnostic errors can lead to unnecessarily condemned compressors and wasted time and resources. The hosts begin by discussing fundamental concepts like […]
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๏ปฟ In this short podcast episode, Bryan talks about what the ambient rating means on a motor. These ratings can be found on both condensing fan motors and blower motors. They have Cs in their rating, which represents the maximum ambient temperature the motor can handle in degrees Celsius (like 40C or 60C). Heat and […]
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๏ปฟ In this episode of the HVAC School podcast, host Bryan discusses superheat with guest JD, who recently co-authored an article on the topic with Ty Branaman. The conversation explores the often misunderstood concept of superheat, its importance in HVAC diagnostics, and common misconceptions technicians have when measuring and interpreting it. Bryan begins by sharing […]
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๏ปฟ๏ปฟ In this short podcast, Bryan talks about how to deal with too much at work and in life. He gives some practical tips to help you when you feel overwhelmed. One of the best ways to get ahead is to wake up early, exercise, get sunlight, stay hydrated, eat healthy, and get enough sleep. […]
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๏ปฟ๏ปฟ Bryan from HVAC School interviews JD Kelly, known as “student of HVAC” on Instagram, about Delta T measurements in HVAC systems. This episode dives into the fundamentals of Delta T, common misconceptions, and proper measurement techniques. JD explains that Delta T is simply a temperature difference between two points of the same medium, which […]
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๏ปฟ๏ปฟ In this short podcast episode, Bryan talks about fire sprinklers and how to avoid setting them off on job sites. Fire sprinklers have an element in the center that expands when exposed to heat (like a TXV sensing bulb) and breaks the glass. When the glass breaks, the fire sprinkler starts pouring out water. […]
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๏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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๏ปฟ๏ปฟ In this short podcast, Bryan answers a listener-submitted question about Nylog, oil, and where you put them when you’re making flares. Nylog is a thickened refrigerant oil (which is either POE for Nylog Blue or mineral oil for Nylog Red), and it’s miscible with the refrigerant and moves with it through the circuit. You […]
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