Instruction and practical application of skills needed to professionally install, maintain, and service fossil-fuel fired and electric-resistance warm air furnaces and systems. Emphasis on medium- and high-efficiency furnace design technology, exhaust gas venting methods, treated air distribution application, and electric/electronic control. Topics include indoor climate comfort, fossil-fuel combustion, furnace construction, air movement, electrical wiring, electronic control, pilot types, ignition processes, efficiency testing, fossil-fuel piping, bi-product venting, duct assembly, air filtration, and distribution system balancing. 3 Credits (2 Lecture - 3 Lab) Prerequisite(s): ACR111 and PLH113 or ACR111 and PLH112.