Breadcrumb Home Heating, Ventilation & Air Conditioning HVAC120M HVAC120M: Related Electricity II Lab Download as PDF Program Heating, Ventilation & Air Conditioning Theory Hours 0 Lab Hours 3 Credits 1 A lab based continuation of HVAC110M covering electrical circuit controls commonly found in air conditioning and heating systems. Students must be simultaneously enrolled in HVAC119M. Prerequisites: HVAC109M and HVAC110M.