Breadcrumb Home/ The Leading Edge of Maintenance | HVAC - SuperHeat Testing/Charging The Leading Edge of Maintenance | HVAC - SuperHeat Testing/Charging Duration 0 hours 2 minutes Explains how to test and charge piston systems using superheat. Covers how to calculate superheat and interpret results to assess refrigerant levels. Back to Course Title The Leading Edge of Maintenance | HVAC - SuperHeat Testing/Charging