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AC/DC, PWM, Serial Communication…80’s Rock Bands or ECM Communication Methods?
Beyond the Blower Door: The Numbers, the Gaps, and the Forces Behind Air Leaks
Dew You Get The Point? A Pragmatic Understanding of Humidity
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
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Thermal Imaging Camera Training for HVAC Techs
AC Not Keeping Up in Hot Weather | HVAC Troubleshooting & Customer Communication
Basics of Testing Electric Heat Kits w/ Bert
Why Compressors Fail: Diagnosis, Replacement & Prevention
Charging and Testing Heat Pumps in Heat Mode
Crankcase Heater Wiring | SureSwitch vs Standard Contactors
GFCI and AFCI Testing Explained | How to Test Ground Fault and Arc Fault Circuit Interrupters
Ultra-Quiet NAVAC NCA10 Condensate Pump Unboxing & Installation | 21dB Mini Split Pump
HVAC Compressor Training | Capacitor Wiring, Hard Start Kits & Voltage Drop
HVAC Condensate Drain Training: Float Switch Wiring & Water Damage Prevention
D-TEK® Pro Demonstration: 0.1 PPM Industry Leading Refrigerant Leak Detector
HVAC Repair Tips: Crankcase Heaters and Refrigerant Charging
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Coil Temp Sensors: Thermostats vs. Thermistors
‘Tis heating season once again. It’s getting colder outside, and the heat pumps are starting to frost up outdoors. The d
Cabinet Leaks in Air Handlers & Fan Coils
When we think of air leakage, a few common scenarios probably come to mind: disconnected ducts at connections, poorly se
Planning and Installing Condensate Drain Lines
The condensate drain is the source of many a service call in Florida. A lot of the time, the problem is just a clogged d
Upgrading Time & Temperature Defrost with Demand Defrost for Heat Pumps
Since heat pumps work by extracting heat from the outdoors to bring it inside, the outdoor coil will almost surely freez
Why the Breaker Size May Be Lower than the MCA (and Why That’s NOT Necessarily a Code Violation)
This HVAC system we recently installed has been causing quite a bit of trouble for us with inspectors. If you look at th
Why Airplanes Fog Up Before Takeoff
Every once in a while, especially on humid days, you’ll sit on an airplane waiting for takeoff and see fog pouring from
Why the Sauna Feels Hotter When You Throw Water on the Rocks
I admit it, I'm a sauna guy now. The ones at the gym are pretty gross, so I got a small one at home because I guess I’ve
Silicon Carbide vs. Silicon Nitride Hot Surface Ignitors (HSIs)
The ignitor of a furnace (or a gas pool heater or other gas-fired appliance) is the heat source, and it can come in one
The Many Uses of Thermal Imaging Cameras in HVAC
When most of us think about tools of the trade, a few main ones come to mind: manifold, multimeter, vacuum pumps, recove
Replacing an Evaporator Coil
Evaporator coil leaks are a fact of life in the industry. (We could have a long and lively discussion about how evap coi
Different Ignitor Types and How They Work
In the furnace sequence of operation, the ignition sequence happens after the safeties have been checked, the inducer fa
The Enemy of My Enemy Is My Friend
As we get older, our understanding of the difference between good and bad—right and wrong—evolves. This understanding of
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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
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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
