HRM-V™ Selection Criteria

The effectiveness of the heat pipe system expressed in a percent is the ratio of the amount of heat transferred to the amount of heat available. The predicted effectiveness is calculated for a system based on the below design parameters. Several factors go into the effectiveness calculation and if these factors change, the expected effectiveness can change. Construction variables such as difference in coil dimensions between supply and exhaust will impact the calculated effectiveness. Unequal airflows between the supply and the exhaust will also change the effectiveness.


  • Air face velocity
  • Number of rows
  • Fin type and density
  • Working fluid
  • Ratio of supply and exhaust airflows
  • Temperature differential between supply and exhaust. The higher the differential, the better is the effectiveness.