• Ideal for older buildings
  • Perfect in scenarios where a lot of hot water is being spent (large buildings and buildings with multiple occupants)
  • Ideal for homes that have more than one bathroom
  • Ideal for areas where water pressure is low.
  • Can be combined with various solar water heating system


  • They require huge spaces
  • They are not energy efficient, especially in the cases where the tanks have poor insulation.
  • The amount of hot water at your disposal is defined by the size of the tank.
  • The main components (heating system and the water pump) are separated, thus require more space.