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HVAC/R
How heating and cooling actually work: the refrigeration cycle, airflow, electrical controls, and the certifications the work requires.
Learning paths
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Content
Fundamentals 17 lessons
Refrigeration
- Heat Transfer Basics
- Pressure-Temperature Relationships
- How the Refrigeration Cycle Works
- Compressors
- Condensers
- Metering Devices and TXVs
- Evaporators
- How Superheat Works
Superheat is how many degrees a refrigerant vapor is above its boiling point at its current pressure.
- How Subcooling Works