HELIO-PASS: Closed loop heat transfer appliance The Helio-Pass (HPAS) heat-transfer appliance is designed for use with coil-in-tank water heating systems. It serves as a closed loop system by circulating solar fluid from the collectors through a tank-integrated coil. Heat from the solar fluid inside the coil is transferred to the domestic water supply.

Standard Features:

  • Sleek modern design
  • Comes standard with Pro Lite controller
  • “Plug & Play” installation
  • Compact assembly
  • Works with all major coil-in-tank heat exchange brands