SuperCool Slide Rule by SuperCool Slide Rule

#1 Training tool used by Colleges, Universities and Training Centers;SuperHeat and SubCooling charging of both R410a and R22;Duct Calculator that calculates CFM of Metal and Flex Duct;Access to approximately 100 free tutorials by scanning the QR code on the tool;Troubleshooting for airflow, capacitors, heating, ohm's law, etc, etc