A compound gauge measures both pressure and vacuum in HVAC systems. It displays positive pressure when the system is above atmospheric pressure and negative pressure (vacuum) when below. This dual functionality helps technicians monitor system performance and diagnose issues in refrigeration and air conditioning units. #HVAC #PressureGauge #Refrigeration #AirConditioning #HVACTechnician #SystemDiagnostics #VacuumMeasurement #CompoundGauge #HVACMaintenance #RefrigerationTechnician #careskillsacad
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