Based on the tried and tested GB family of heaters, the OGB Z water heater, in addition to already mentioned qualities represents the utmost perfection of advanced technology.

Inside are 6 air-heating elements inserted into metallic protective tubes within the heating flange. As opposed to the classic single-stage version of the OGB, the OGB Z is of a double-stage design.

Such design offers:
· great adaptability in power setting and operation mode selection
· reductions of electricity costs (usage of cheaper off-peak electricity rates)
· rapid heating with increased power when greater need for hot water arises

• Top Class Long Life model
• new elliptic shape
• superb insulation 
• arbitrary water temperature setting to 85°C
• additional functions:
• heating power selection
• double-stage power
• keypad for rapid heating
• display of electrical heating element operation
• additional indication of rapid heatin 
• temperature setting options :
  • economical temperature and
  • protection against freezing
• indirect tubular air-heating elements
• simpler maintenance and service
• 2 year general warranty, 7 year warranty for the tank

(1) Values are valid for mixing water with a temperature of 15°C from the cold inlet with water at 65°C from the heater (standard SIST EN 60379:2005).
(2) Measured at 20°C ambient temperature and 65°C water temperature in the heater (standard SIST EN 60379:2005).