HVAC-134 — HVAC Commercial Refrigeration and Air Conditioning 3

HVAC - 134 HVAC Commercial Refrigeration and Air Conditioning 3 HVAC - 134 HVAC Commercial Refrigeration and Air Conditioning 3 Study of cooling towers and pumps, chilled water systems, package rooftop systems, variable refrigerant and air flow systems and troubleshooting of commercial systems.