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HVAC Troubleshooting 101
High Performance Heat Pump Retrofits
All About Airflow Testing
Add Duct Renovations to Your Product Offerings
Don’t Just Change The Unit, Change The Outcome! A Systematic Process for HVAC Replacements
Solving the Ventilation Puzzle
In Search for the Holey Coil
New Equipment Commissioning: Easier, Faster, Better
ACCA Manual T and Other Important Duct Stuff
IAQ, Building Science, & HVAC: The Trifecta of Building Better Environments
Using Building Science to Close at the Kitchen Table
ProCalcs
Search results in Videos
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Crankcase Heater Wiring | SureSwitch vs Standard Contactors
GFCI and AFCI Testing Explained | How to Test Ground Fault and Arc Fault Circuit Interrupters
HVAC Compressor Training | Capacitor Wiring, Hard Start Kits & Voltage Drop
HVAC Condensate Drain Training: Float Switch Wiring & Water Damage Prevention
HVAC Repair Tips: Crankcase Heaters and Refrigerant Charging
Brazing Without Nitrogen – Deadly Consequences For Compressors (Explained)
Dealing with Upset Customers: HVAC De-escalation Strategies
Ecobee Smart Thermostat Setup – Two Stage Systems & Client Support
How to Handle Price Objections: HVAC Sales Training
Santa Fe V155 Whole House Dehumidifier Install
Charging and Testing Heat Pumps in Heat Mode
Compressor Oil Dangers – Can It Really Melt Plastics – Crazing Explained
Search results in Tech Tips
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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 proce
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 homeo
Design and Performance Challenges of Air-Source Heat Pumps Across Diverse Climatic Conditions
This tech tip was inspired by Alex Meaney and Ed Janowiak’s session at NCI’s High-Performance Summit 2025: “Good Design
Brownouts and How They’re Killing HVAC Equipment
HVAC technicians typically focus on diagnosing issues related to mechanical wear, refrigerant leaks, or control problems
CAT Ratings on Electrical Multimeters
If you have a multimeter for HVAC work, you most likely have a meter with a CAT III rating on it. Some might also be rat
AHRI Performance Data vs. Manufacturer Expanded Performance Data (and When to Use Each)
Equipment selection may seem like a pretty straightforward process: look at the data plate, find the tonnage that’s clos
Field Guide to Crankcase Heaters
Crankcase heaters are a critical but often overlooked component in air conditioning and refrigeration systems. Their fun
What Makes a Thorough Comfort Consultation
This tech tip is based on an HVAC School podcast episode with Tim De Stasio. Tim has written several articles about HVAC
Compressor Failure: Diagnosis and Replacement Checklist for Residential and Light Commercial Equipment
Special thanks to Ty Branaman and Bert Testerman for their work and feedback on this tech tip about compressor failure.
Scroll Compressors in a Changing Regulatory Landscape
This tech tip is based on an HVAC School podcast episode with Jeff Kukert and Tom Fesenmyer from Copeland. Jeff is the s
Ducting Ventilating Dehumidifiers
This tech tip was written with the guidance of Nikki Krueger, the Director of Marketing & Business Development at Santa
Measuring RTU Curbs with Adapters in Place
Each commercial rooftop unit (RTU) needs to be mounted to a curb. A curb supports the RTU and provides openings for the
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Review of Vacuum for Service Engineers
Refrigerant Charging and Service Procedures for Air Conditioning
Bob’s House
Commercial Refrigeration for Air Conditioning Technicians
Refrigeration & Air Conditioning Technology
Fundamentals of HVACR
Understanding Manual D
Electricity for Refrigeration, Heating, and Air Conditioning
The Home Comfort Book
Modern Hydronic Heating
Search results in Apps
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Browning® Toolbox Technician™
Regal Beloit America Incorporated
The FREE Browning® Toolbox Technician™ app delivers an indispensable toolset for all HVAC contractors and maintenance personnel, including calculation tools, conversion tools, GPS enabled distributor locator, plus informative reference, installation and troubleshooting guides for everything from bearings to v-belts. This app also features the revolutionary V-Belt ID Wizard™, empowering personnel in the field to quickly identify an installed belt, even when the product ID is unknown.
Browning® Toolbox Technician™ features:
- V-belt troubleshooting
- V-belt selection guide
- Bearing basics & FAQs
- Air handler bearing interchange
- V-belt ID Wizard™ with part lookup & product images
- Where to Buy with GPS option
- Various conversion tools
- Efficiency calculators
- Much more!
Ref Tools
Danfoss A/S
The essential, all-in-one mobile app for air conditioning and refrigeration technicians
Get the guidance, support, information, and tools you need—on the job and infield. Ref Tools is a free, powerful app that contains essential tools every air conditioning and refrigeration technician needs in their digital toolbelt.
Previously known as Refrigerant Slider, Ref Tools represents the next digital evolution in the cooling industry. HVACR tools are becoming smarter, better, and easier to use, and Ref Tools puts them in the palm of your hand.
Our latest update greatly improves the in-app podcast experience—you can now subscribe to podcasts, enable notifications for new episodes, filter podcasts by language, and enjoy a new, streamlined player.
Measure Quick Hvac
MeasureQUICK
With measure Quick HVAC you can diagnose system problems from the most trivial to the most complex.
Our powerful data aggregation tools, coupled with just-in-time education, will increase a technicians ability to solve problems on the job site, ultimately leading to a huge increase in productivity.
Measure Quick makes measurement science work!
HVAC School
By Techs for Techs
The app that helps you remember some things you forgot along the way, as well as helps you remember some things you forgot to know in the first place.For all current and aspiring HVAC technicians: HVAC School is the premiere source for knowledge and success in the HVAC industry.
With this app you can:
Listen to all episodes of the HVAC School podcast, a podcast committed to bringing you relevant and up to date knowledge of the HVAC industry and what it means to be an HVAC technician.
Read tech tip articles written by industry professionals on various topics to help build your knowledge base and understanding of HVAC theory
Interact with calculators that employ common HVAC equations to help build your understanding of important HVAC mathematics
