This module provides a technical overview of how refrigerants function as the primary medium for heat transfer within HVAC systems. It traces the journey of refrigerant through the compressor and metering device, explaining how changes in pressure and temperature allow for the cooling or heating of a conditioned space. Additionally, the module emphasizes the importance of a proper refrigerant charge to ensure system efficiency and the ability to maintain desired indoor temperatures.

This module provides an in-depth examination of the various ways common refrigerants differ. It details the critical safety standards for flammability and toxicity, explaining how these classifications are used to evaluate different substances.

This module provides an in-depth comparison of R-22 and R-410A, the two most common refrigerants in the HVAC industry. It explores their chemical compositions, safety classifications, and the specific types of lubricants required for each. Additionally, the module covers the environmental regulations and phase-outs that are driving the transition toward more sustainable refrigerant alternatives.

This module provides an in-depth look at alternative refrigerant types that have emerged as viable drop-in replacements for R-22. It explores the characteristics of R-343a, R-407c, and MO-99, highlighting their safety classifications, lubricant compatibility, and necessary system adjustments during retrofitting. Additionally, the module examines the environmental trade-offs of these alternatives, such as their zero ozone depletion potential versus their significant global warming potential.

This module examines the transition toward environmentally friendly refrigerant solutions, highlighting their significantly lower global warming potential and their classification as mildly flammable (A2L) refrigerants. Technicians and contractors will learn the essential safety and maintenance considerations required for installing and servicing systems charged with these future-oriented products.

This final knowledge check is designed to reinforce key concepts from the lesson and assess your understanding. You’ll apply what you’ve learned through a series of multiple choice questions, helping ensure you’re confident and ready to move forward.