This package contains teacher and student editions of a residential and light commercial heating, ventilation, and air conditioning (HVAC) course of study. The teacher edition contains information on the following: using the publication; national competencies; competency profile; related academic and workplace skills list; tools, equipment, and materials list; and list of 38 references. The curriculum consists of 18 units designed for use in more than one lesson or class period of instruction. Each unit provides an instructional plan outlining preparation, delivery and application, and evaluation; teaching suggestions; and a list of supplemental resources. The unit also contains answer keys for assignment sheets and written test, unit evaluation, information sheet, and transparency masters. Unit topics are as follows: psychrometrics for residential HVAC; psychrometrics for light commercial HVAC; residential load calculations; residential duct design and sizing; residential air quality management; light commercial load calculations; light commercial system design; light commercial air treatment; standard gas-fired furnaces; high efficiency gas-fired furnaces; oil-fired furnaces; electrical heating systems; cooling systems; heat pump systems; balance points; introduction to hydronics; customer relations; and service operations. The student edition provides these materials for each unit: object sheet with unit and specific objectives; information sheet; assignment sheets; and job sheets. (YLB)