| Comprehensive Free Site for all Mitsubishi Literature | Ductless | https://mylinkdrive.com/ |
| Carrier's Dealer Site with Literature and Information | Unitary Manufacturer | https://hvacrschool.com/partners/ |
| Great guide on soldering and brazing by Harris | Brazing | https://hvacrschool.com/wp-content/uploads/2016/11/GuidetoBrazingandSoldering.pdf |
| Our Guide to Testing a Capacitor Accurately w/ the System Running | Electrical | https://hvacrschool.com/wp-content/uploads/2017/06/How-To-Test-a-Run-Capacitor-Under-Load-1.pdf |
| HVAC/R Diagnosis Basics and Formulas Cheat Sheet | Refrigerant Circuit Diagnosis | https://www.hvacrschool.com/Quick-Sheet |
| Basic Test Procedure for Checking the Charge Without Gauges | Refrigerant Circuit | https://hvacrschool.com/wp-content/uploads/2017/12/Checking-Charge-WO-Gauges.pdf |
| Proper Belt Tension Procedure from Browning | Commercial Service | https://hvacrschool.com/wp-content/uploads/2017/09/belttensioning.pdf |
| Testo Psyc Chart | Air Flow | https://hvacrschool.com/wp-content/uploads/2017/04/Psychrometric_Chart.pdf |
| Klein Guide on Bending Electrical Conduit | Eletrical | https://hvacrschool.com/wp-content/uploads/2017/08/ConduitBenderGuide.pdf |
| 7 Keys to servicing CO2 Systems from Emerson's Andre Patenaude | Refrigeration | https://hvacrschool.com/wp-content/uploads/2017/05/CO2_PDF.pdf |
| The Best App on the market fro real time HVAC diagnosis | HVAC | https://hvacrschool.com/apps-page/ |
| Danfoss Refrigerant Slider App | HVAC | http://refrigerationandairconditioning.danfoss.com/support-center/apps-and-software/coolapps/refrigerant-slider/ |
| Browning Toolbox Technician | Commercial | https://browning-power-transmission-solutions.en.aptoide.com/app |
| Apps for Compressor cross reference and much more | HVAC | http://climate.emerson.com/en-us/tools-resources/mobile-apps |
| The timeless classic on motors operation and selection | Motors | https://hvacrschool.com/wp-content/uploads/2016/11/fasco_motor_facts.pdf |
| Lennox Piping Guide | Piping | https://hvacrschool.com/wp-content/uploads/2017/07/Refrigerant-Piping-Manual.pdf |
| Best Practices for compressor replacement | Procedure | https://hvacrschool.com/wp-content/uploads/2018/01/Compressor-Installation.pdf |
| Best Practices for Combustion Analysis by Testo / Jim Bergmann | Gas | https://hvacrschool.com/wp-content/uploads/2018/03/CombustionGuide.pdf |
| Diagnose Compressors Not Running From Emerson / Copeland | Refrigeration | https://www.hvacrschool.com/wp-content/uploads/2020/08/2004ECT-126_NOTRUNNING.pdf |
| Emerson Toolbox Talks | HVAC/R Education | https://climate.emerson.com/en-us/training-support/hvacr-training/contractor-tool-box-talks |
