| Date | Rev | Topic |
|---|---|---|
| Apr 2026 | 0 | ACCA Manual J Explained |
| Aug 2023 | 2 | The art of system troubleshooting |
| Jan 2023 | 2 | Do you know the R-410A replacement refrigerants? |
| Jan 2023 | 2 | DOE 2020 AWEF Standard |
| Jan 2021 | 0 | DOE 2023 SEER Standard |
| Jan 2023 | 1 | The FDA Food Code |
| Oct 2021 | 2 | Ideal gas law primer |
| Jan 2025 | 0 | New Low-GWP Refrigerants Comparison (Part 1) |
| May 2025 | 0 | New Low-GWP Refrigerants Comparison (Part 2) - The Case for CO2 |
| Jan 2023 | 1 | The P-h diagram |
| Apr 2022 | 0 | Psychrometrics primer |
| Jan 2023 | 3 | R-134a, R-404A and R-507 replacement refrigerants |
| Jan 2026 | 3 | Refrigerant history and other stuff |
| Apr 2025 | 3 | Refrigerant line sizing |
| Jan 2023 | 2 | Thermodynamics for the HVACR technician |
| Dec 2023 | 1 | Understanding the Fan Laws |
| Jan 2023 | 2 | Understanding the TEV (TXV) |
| Mar 2026 | 1 | What are ejectors? |
| Feb 2023 | 3 | WICF heat load calculations |