02 - How Air Conditioners Work

from National Home Inspector Exam Prep Podcast · host Charles Bellefontaine

Send us Fan MailUnderstand the refrigerant cycle, cooling and heating modes, heat pump operation, and the role of key components in residential AC systems.Show Notes:Episode Overview: Learn how air conditioning systems operate, including the refrigerant cycle for air-source systems, the role of evaporator, compressor, condenser, and metering devices (TXV/TEV/EEV), and how heat pumps reverse the cycle for heating. Covers mini-splits, packaged systems, and regional variants.What You'll Learn: • Refrigerant flow path: evaporator → compressor → condenser → metering device → evaporator • How refrigerant absorbs heat indoors and rejects it outdoors • Metering device operation (TXV/TEV or EEV) • Heat pump heating cycle and reversing valve mechanism • Mini-splits, packaged systems, and regional variantsKey Takeaways: ✓ Understand the complete refrigerant cycle ✓ Know how heat pumps provide both cooling and heating ✓ Recognize system types and their operational differencesIRC Code References: IRC 2018 Chapter 14 (Heating and Cooling Equipment)Study Tips: Draw the refrigerant cycle from memory. Label each component and describe its function.Intro This episode is brought to you by GetSync.pro This episode is hosted by Charlie Bellefontaine of Chicagoland Home InspectorsFor complete training with visual materials, practice exams, and certification support, visit nhiexamprep.com© 2025 National Home Inspector Exam Prep Podcast. All rights reserved.

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This episode was published on December 29, 2025.

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