Continued study of mechanical heating systems and piping skills, focusing on the sun as a source of heat, mechanisms of transferring this heat to the building, and the equipment needed to accomplish this. Installation and maintenance of both passive and active solar systems, plus domestic water and space heating systems, are included. (Formerly RET222) 4 Credits (2 Lecture - 6 Lab) Prerequisite(s): PLH214 or RET214 or PLH112 or PLH113. Spring Only.