Nitrosys + is a low pressure system that uses standard formulation foam designed for high pressure systems. Nitrosys + Includes auto calibration, pre heaters and heated hoses, transfer pumps and a Handi Foam II gun or Nitrosys Plus gun. Auto calibration allows your materials to be mixed in the correct ration saving in waste and labor costs. The Pre- heaters and heated hoses maintain constant temperatures and increase consistency and yield. Transfer pumps move material from 5-55 gallons into Nitrosys to be auto calibrated.