HVAC School - Invidious

HVAC School

HVAC School provides free, practical HVAC/R training—primarily for techs, by techs.

We connect the “why” to the work: electrical, refrigeration, airflow, diagnostics, installation, commissioning, service, building science, and commercial refrigeration. You’ll find field demonstrations, 3D explanations, full classes, interviews, and honest conversations with people who do the work.

Facts only become useful when you can apply them. Our goal is to help you understand the system, take better measurements, solve problems safely, and remain humble enough to keep learning.

Start here: www.hvacrschool.com/start/

Tech tips, podcasts, quizzes, calculators, courses, and the free HVAC School app: www.hvacrschool.com/

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6:26

Is Your Home's Air Quality Bad? I Tested Mine for 4 Days

HVAC School

Shared 10 hours ago

2.3K views

25:36

HVAC Diagnostics: External Static Pressure (ESP), Airflow & Delta T

HVAC School

Shared 4 days ago

8.2K views

14:48

How to Stop HVAC Callbacks For Good — 5 Simple Steps w/ Bert

HVAC School

Shared 1 week ago

4.3K views

42:44

TXV, Airflow & the Refrigeration Cycle Fundamentals

HVAC School

Shared 1 week ago

7.6K views

16:17

Why Condensate Drains Clog And How to Stop It

HVAC School

Shared 2 weeks ago

22K views

8:00

Thinking Outside of the Box and Inside the Cube with Roman Baugh

HVAC School

Shared 2 weeks ago

2.4K views

10:50

Ventilation 101: Dryer Airflow, Bathroom Fans & Fire Hazards

HVAC School

Shared 3 weeks ago

3K views

12:10

Garage HVAC Units Explained

HVAC School

Shared 3 weeks ago

4.3K views

1:09:09

What It Takes to Run a Safe, Hands-On Skilled Trades Camp

HVAC School

Shared 4 weeks ago

1.3K views

4:30

NAVAC SK4TPHM1 Smart Probe Kit: System Performance Profile Setup

HVAC School

Shared 1 month ago

4.2K views

6:07

Why Pulling a Vacuum Matters: POE Oil, Acid and Compressor Failure

HVAC School

Shared 1 month ago

4.7K views

5:18

Return Air Handler Platform Cutting Tips

HVAC School

Shared 1 month ago

2.4K views

34:37

Refrigerant 101: Glide, Blends & Why You Can't Mix Refrigerants

HVAC School

Shared 1 month ago

4K views

23:05

How to Test TESP – Total External Static Pressure on Air Handlers and Gas Furnaces

HVAC School

Shared 1 month ago

5.6K views

5:41

Why Room Pressure Matters 3D

HVAC School

Shared 1 month ago

4.6K views

28:51

Metering Device Troubleshooting: Subcooling, Sight Glasses & Restrictions

HVAC School

Shared 1 month ago

7K views

7:16

Limit Switch Troubleshooting for HVAC Techs

HVAC School

Shared 2 months ago

2.8K views

14:08

HVAC Compressor Protection: Discharge Line Temperature, Superheat & MeasureQuick Explained

HVAC School

Shared 2 months ago

6.7K views

6:13

The Wide/Narrow/Wide Approach: How to Think Big Picture on Every HVAC Service Call

HVAC School

Shared 2 months ago

2K views

6:32

Pressure vs. Temperature Explained: The Key to Diagnosing Any Refrigerant System

HVAC School

Shared 2 months ago

9.3K views

8:16

HVAC Condensate Drain Troubleshooting: Traps, Vents & Static Pressure

HVAC School

Shared 2 months ago

10K views

22:29

Refrigerant Leak Detection Tips

HVAC School

Shared 2 months ago

7.5K views

33:12

HVAC Safety Training for Technicians | Ladders, PPE, Lockout Tagout & More

HVAC School

Shared 2 months ago

1.5K views

54:35

HVAC Summer Service Calls: Rushing, Mental Fog & How to Stay on Your Game

HVAC School

Shared 3 months ago

8.4K views

30:00

HVAC Install Process Improvement: How to Eliminate Surprises on Every Job

HVAC School

Shared 3 months ago

8K views

13:16

VRV Service Call: Solving the J2 Error Code with Roman Baugh

HVAC School

Shared 3 months ago

5.3K views

12:06

The "Heat Trick" for Checking Compressor Oil with Roman Baugh

HVAC School

Shared 3 months ago

7.3K views

19:21

The Science Behind Torch Tips Every HVAC Tech Must Know

HVAC School

Shared 3 months ago

5.6K views

6:36

Piercing Valve Training (Step by Step) with Roman Baugh

HVAC School

Shared 4 months ago

8K views

9:41

Psychrometrics and The Magic Line 3D

HVAC School

Shared 4 months ago

4.5K views

14:44

Low-Pressure Controls Explained | Commercial Refrigeration

HVAC School

Shared 4 months ago

2.8K views

15:03

Commercial HVAC Drain Cleaning: Pro Tips That Prevent Callbacks

HVAC School

Shared 4 months ago

4.4K views

23:50

Refrigerant Circuit Basics for HVAC techs

HVAC School

Shared 4 months ago

9.7K views

14:38

Why This Hotel HVAC Breaker Kept Failing with Roman Baugh

HVAC School

Shared 4 months ago

5.8K views

3:14

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

HVAC School

Shared 4 months ago

1.9K views

5:27

HVAC Control Board Troubleshooting: Voltages, Error Codes & Common Failures Explained

HVAC School

Shared 4 months ago

9.8K views

17:30

Troubleshooting a Mystery HVAC Unit with Roman Baugh

HVAC School

Shared 5 months ago

12K views

6:05

HVAC Defrost Troubleshooting | Timers, Sensors and Boards

HVAC School

Shared 5 months ago

4.3K views

14:53

Faster VRV Diagnostics: Mastering the Daikin Bluetooth D-Checker | Roman Baugh

HVAC School

Shared 5 months ago

5.8K views

5:20

ZoomLock PUSH & MAX: Braze-Free Refrigerant Fittings Demo

HVAC School

Shared 5 months ago

2.3K views

4:38

Retrotec Duct Leakage & House Pressure Demo

HVAC School

Shared 5 months ago

1.7K views

4:27

Jim Bergmann on MeasureQuick's Latest Features

HVAC School

Shared 5 months ago

1.3K views

4:37

How to Repair Damaged AC Coil Fins | SHAECO Tool Demo with TruTech Tools

HVAC School

Shared 5 months ago

14K views

5:35

UEI NEW Products 2026! UEICLIP Personal CO Monitor, High Accuracy Clamp Meter & More

HVAC School

Shared 5 months ago

3.5K views

2:45

ACCA Training & Certification Explained | 7th Annual HVAC/R Training Symposium

HVAC School

Shared 5 months ago

1.1K views

4:41

Viper Sniper, WetRag Heat Shield Pad & More | Refrigeration Technologies Product Showcase

HVAC School

Shared 6 months ago

1.4K views

4:41

NEW NAVAC Tools! Wireless Probes + Touchscreen Manifold

HVAC School

Shared 6 months ago

2.6K views

6:18

NAVAC NEXUS™ 2 Digital Manifold Gauge Hands-On | AHR Expo 2026

HVAC School

Shared 6 months ago

8K views

4:31

UEI Test Instruments: UEICLIP Personal CO Monitor & Advanced Combustion Analyzer

HVAC School

Shared 6 months ago

1.1K views

8:18

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

HVAC School

Shared 6 months ago

3.9K views

5:40

UEI NEW Products at AHR Expo 2026 | Advanced Combustion Analyzers & Wireless Gauges

HVAC School

Shared 6 months ago

2.2K views

5:40

Copeland Sensi Equipment Interface Module (EIM) Demo | AHR Expo 2026

HVAC School

Shared 6 months ago

1.1K views

4:53

NAVAC Full Booth Tour - AHR Expo 2026

HVAC School

Shared 6 months ago

2.5K views

3:43

NEW Fieldpiece Analog Manifold Gauges

HVAC School

Shared 6 months ago

4K views

23:09

Capillary Tube Repair and Brazing Class

HVAC School

Shared 6 months ago

9.7K views

4:20

Santa Fe Ultra V-Series Dehumidifiers: Digital Controls & Enhanced Ventilation

HVAC School

Shared 6 months ago

1.2K views

6:45

Vacuum Pump Gas Ballast Deep Dive - Moisture, Oil & Maintenance | NAVAC | AHR Expo 2026

HVAC School

Shared 6 months ago

2.5K views

18:21

Refrigeration Technologies Founder John Pastorello: 50 Years of HVAC Innovation | AHR Expo 2026

HVAC School

Shared 6 months ago

1.4K views

5:22

Copeland Transcritical CO2 Semi-Hermetic Compressor Explained | AHR Expo 2026

HVAC School

Shared 6 months ago

1.5K views

29:51

How to Prevent HVAC Callbacks | Maintenance Service Checklist Explained - Part 1

HVAC School

Shared 6 months ago

4.9K views