Open Vented Hot water storage cylinders

  • Open vented hot water storage cylinders were the norm before the introduction of unvented cylinders.
  • Still commonly used for solid fuel applications with large diameter coils to allow for gravity circulation.
  • Direct cylinders are heated directly by an immersion heater.
  • Indirect cylinders are heated indirectly by another heat source (e.g. gas, oil or biomass boilers) through an internal coil.

Select Option Direct or Indirect