The most complete and comprehensive HVAC technician certification book on the market now features updated information and an all-new interactive practice exam CD. The DEWALT� HVAC Certification Exam Guide, 2E is fully equipped to give you the tools you need to prepare for the NATE, ICE, and RSES Certifications, as well as the HVAC Excellence and HVAC Technician Licensing Exams. It also serves as a valuable resource in studying for the state limited energy license and HVAC contractor licenses. At the core of this book's effectiveness is the foundation of study aids, exam strategies, and realistic sample exams. Another feature is the practice exam CD that simulates the exam experience and includes the ability to skip questions, mark questions to review later, and assess subject areas that need improvement.