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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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How to Replace a Condensing Fan Motor

Service calls about condensing fan motor failure are quite common. Even though fan motor replacement is a standard procedure for residential split systems, it requires careful attention to safety and detail. This article will give you a step-by-step guide to replacing condensing fan motors. Along the way, we will also explain a few best practices […]

Don’t Get Depressed (Unless You’re a Core)

This website is for professional HVAC techs and those actively learning to become professional HVAC techs, not DIY homeowners. I feel like that needs to be said before I state these seemingly obvious facts, but these very obvious facts are so commonly mistaken that they need to be covered. Take a look at the two […]

I’ve Done It This Way for 20 Years – And That’s the Problem

Every trade has its favorite phrases. One of the most common in HVAC goes something like: “I’ve been doing it this way for 20 years and never had a problem.” When you hear that—or when you catch yourself saying it—it’s worth stopping to think. Usually, what that sentence really means is: “I’ve been doing it […]

10 Things I’ve Learned in the Last 10 Years

Humility in Thought Leadership

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Symposium Day 1 Introduction

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Subcooling with R-454B: Measurement and Troubleshooting

Air Sealing and Static Pressure Diagnostics

Fast-Stat 5000 Unboxing

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Analyst vs. PM vs. Operations – Short #261

In this short business-oriented podcast, Bryan breaks down the differences between three commonly confused positions/roles: analyst vs. PM (project management) vs. operations. When you own or work in a small business, you might wear a lot of hats: estimating, writing proposals, troubleshooting, being a customer or coworker's therapist, etc. This work can be organized, […]

How to REALLY get S&!# Done! w/ Nate Agentis

In this powerful episode of the HVAC School podcast, Bryan sits down with Nate Agentis, third-generation plumber and author of Get Shit Done: How to Build a Strong Team, A Profitable Business, and a Lasting Legacy. Their conversation explores the intersection of personal health, business success, and meaningful leadership in the trades industry. Nate's journey […]

The Hidden Cost of Killing Radiant Load – Short #260

In this short podcast, Bryan talks about the hidden cost of killing radiant load, especially when it comes to installing radiant barriers in attics. We sometimes get service calls about ducts sweating when they never used to sweat. If there are no problems with the system (i.e., the refrigerant charge, static pressure, airflow, supply […]

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 […]

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. If you are young and new to the trade, we need you. We are grateful to have you. However, if you aren't thoughtful, you might […]

Basic Electrical Circuits

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