viii Features of the Textbook The instructional design of this text- book includes student-focused learn- ing tools to help you succeed. This visual guide highlights these features. Chapter Opening Materials Each chapter opener contains a chap- ter outline, a list of learning objec- tives, and a list of technical terms. The Chapter Outline provides a preview of the topics that will be covered in the chapter. Objectives clearly iden- tify the knowledge and skills to be obtained when the chapter is com- pleted. Technical Terms list the key words to be learned in the chapter. The Introduction provides an over- view to the chapter content. Additional Features Additional features are used through- out the body of each chapter to further learning and knowledge. Safety First features alert you to potentially dan- gerous materials and practices. Code Notes point out specific items from typical HVACR codes. Procedures are highlighted throughout the text- book to provide clear instructions for hands-on service activities. Tech Tips provide hands-on guidance that is especially applicable for on-the-job situations. Green Tips highlights key items related to sustainability, energy efficiency, and environmental issues. Timeout for Math provides key mathematical practice and explana- tions to on-the-job scenarios. Did You Know? features offer interesting facts and tidbits on topics and concepts that provide a bigger picture.