The nozzle affects the performance of the horizontal models significantly - they can now provide the same quantity of hot water as a vertical one with PISTON 1 [2].

The innovative design of PISTON 4 ensures the most efficient use of the entire volume of hot water, regardless of the flow rate and with simultaneous consumption at several points of use. It enables the nozzle slowing down the mixing of the incoming cold water and the water already heated in the appliance through leveling the pressures in the mixing area. The specific bell shape keeps the hot water "unapproachable".

 

1 -  This is valid for some TESY Horizontal water heaters with PISTON 4 compared to TESY Horizontal water heaters with PISTON 1 with water flow 10l/min.

2 - This is valid for an 80l TESY Horizontal water heater with PISTON 4 compared to a TESY Vertical water heater with PISTON 1 with water flow 10l/min.

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