Conquer the California Warm-Air Heating, Ventilating and Air-Conditioning Contractor Exam (C-20 License): Study Guide for HVAC System Design, ... Contractors State License Board (CSLB) Exams) Paperback – December 22, 2025

Warm-air heating, ventilating, and air-conditioning systems play a central role in residential and light commercial buildings throughout California. This comprehensive study guide delivers clear, structured coverage of HVAC system design, fabrication, installation, operation, repair, maintenance, and safety, with a focus on real-world system behavior and performance.The book explores heating and cooling fundamentals, airflow dynamics, duct design, equipment selection, electrical and control systems, refrigerant circuits, and moisture management. Each topic is presented using concise, audio-friendly paragraphs that explain how systems function as integrated wholes rather than isolated components.Troubleshooting and maintenance receive in-depth attention, helping readers understand common performance issues, system aging, airflow imbalance, and control faults. Safety chapters address electrical hazards, refrigerant pressure risks, jobsite practices, and confined-space considerations relevant to HVAC work environments.Designed for clarity and efficiency, this guide avoids unnecessary jargon, excessive calculations, and exam-specific language. It serves as a focused technical reference for anyone seeking a strong working understanding of warm-air HVAC systems in California-based applications. Read more