Hvac Level 2 Trainee Guide, Paperback by Nccer (COR), ISBN 0135185122, ISBN-13 9780135185124, Like New Used, Free shipping in the US This exceptionally produced trainee guide features a highly illustrated design, technical hints and tips from industry experts, review questions and a whole lot more! Key content includes: Alternating current, Compressors, Refrigerants and Oils, Leak Detection Evacuation Recovery and Charging, Metering Devices, Heat Pumps, Basic Maintenance, Chimneys Vents and Flues, Sheet Metal Duct Systems, Fiberglass and Fabric Duct Systems, Commercial Airside Systems, Air quality Equipment, and Introduction to Hydronic Systems.