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Bryan Orr

Company name: Kalos Services

Position: President

Bryan is the founder of HVAC School. Established in 2016, HVAC School produces free educational podcasts, videos, and tech tips for HVAC and refrigeration professionals.

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What’s the Scoop on PM10 and PM2.5 Particles?

MATLAB Handle Graphics It was December 5th, 1952, only seven years after the end of WWII, in London, England, when the “Great Smog” settled across the city. The “great smog” was the result of a meteorological anomaly combined with unchecked industrial pollution. Still, even once it settled on the city, bringing business to a screeching […]

Negative Superheat? Time to Check Your Tools

I was fresh out of school, working as an apprentice at my first real HVAC job, and I was listening in on a shop conversation between a few techs. They were talking about finding so many overcharged systems. One of the techs turns to me and says, “I had a unit yesterday that was so […]

Setting & Checking Charges in the Rain

I live in Central Florida, and while it can get pretty hot in the summer, we also tend to get afternoon thunderstorms that come and go in a flash. I have been connecting gauges, checking charges, and even pulling vacuums in the rain (even under umbrellas or cardboard boxes) for most of my career. Only […]

Moisture Hunters: Slaying the Condensation Demons in HVAC

Business Panel

10 Things I’ve Learned in the Last 10 Years

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Santa Fe SmartAire Remote Sensor | Whole Home Dehumidifier Control Made Easy

How to Install a Toilet – Complete Step by Step Guide in 3D

HVAC Drain Lines: Installation, Troubleshooting & Best Practices

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Succession in Family Business w/ TruTech & Kalos

In this special collaborative episode between the Building HVAC Science Podcast and HVAC School, host Bryan Orr sits down with his father and co-founder Robert Orr (Kalos) and Bill and Billy Spohn, the father-son duo behind TruTech Tools, for an in-depth conversation about the realities of running, transitioning, and ultimately passing the torch in […]

Troubleshooting Tips and Tricks w/ Let’s Be Techs

In this episode of the HVAC School Podcast, host Bryan sits down with Johnny, the creator behind the popular social media channel “Let’s Be Techs.” Johnny brings a wealth of hands-on experience to the table, having spent his first 13 years in residential HVAC before transitioning into commercial refrigeration. He shares his unconventional path […]

Better Seen than Viewed w/ Jim Bergmann

In this heartfelt and wide-ranging episode, host Bryan reconnects with Jim Bergmann of measureQuick after nearly three years apart. The reunion is anything but ordinary — Jim opens up about a serious battle with non-Hodgkin's B-cell lymphoma that sent him through not one but two rounds of chemotherapy, ultimately requiring a cutting-edge CAR-T cell […]

8 Tips for New Techs (So You Don’t Get Fired)

If you are new to the trade, I'd like to welcome you. Like many skilled trades, the HVAC/R trade has many opportunities and can help you make a good living. We need those of you who are young and new to the trade, and we are grateful to have you. But as a word of […]

The Strange Behavior of Moisture in Stuff

Water is weird and water vapor is even weirder – before we dive down this rabbit hole lets define some terms To better understand the behavior of moisture in materials, we need to first define some essential terms and concepts: Relative Humidity (RH): The ratio of the amount of water vapor in the air to […]

Basic Electrical Circuits

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