CEX Water Heater Undersink

Original Price £552.68 Special Price £386.88 £322.40
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1 Year
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Zip InLine CEX-O and CEX-U instantaneous water heaters are micro-processor controlled, pressure resistant water heaters suitable for supplying hot water to one or more outlets.

The heating element switches on automatically when the hot water tap is opened and switches off automatically when the hot water tap is closed.

The electronic control system automatically regulates the power consumption depending on the supply water temperature and flow rate to achieve the required outlet temperature within the power limit of the appliance.

Power consumption is also regulated based on outlet temperature to ensure the required temperature is achieved exactly to the degree and irrespective of fluctuations in voltage and water pressure.

The power rating of the appliance can be selected as either 8.8kW or 6.6kW at 230V at the time of installation.

The required outlet temperature can be entered on a keypad within the range 30°C to 55°C and can be read off the digital display.

The maximum inlet temperature of 70°C is suitable for use with preheated water e.g. from solar heating systems.


 - Single or multiple outlet

 - Power rating of 6.6 - 8.8kW

 - Power rating to be set at installation

 - Oversink and undersink options

 - Digital Display

 - Temperature can be set via touch sensitive keys 32 - 55ºC

 - Constant supply of hot water at the temperature selected dependant on local conditions

 - Electronically controlled to compensate for variable inlet pressures and temperature

 - Solar and preheated water system compatible.


Product Code CEX-O CEX-U
Application Over-sink Under-sink
Nominal supply voltage 1/N/PE 230V~
Power Rating (kW) 6.6 / 8.8
Rated Current (A) 29 (6.6kW) / 38 (8.8kW)
Element type Bare wire
Rated pressure 1 MPa (10 bar)
Temperature adjustment range 30ºC - 55ºC
Maximum inlet temperature 70ºC
Factory set flow rate at 3 bar (l/min) 4.2
Minimum flow rate (l/min) 2.0
Maximum flow rate (l/min) 5.0
Flow rate @ 38ºC (l/min) 3.6 (6.6kW) / 4.8 (8.8kW)
Flow rate @ 50ºC (l/min) 2.5 (6.6kW) / 3.3 (8.8kW)
Pressure loss @ 2.5 l/min 0.2 bar
                     @ 9.0 l/min
0.2 bar
1.3 bar
Required specific water resistance @ 15o C >1100 ohm.cm
Dimensions H x W x D (mm) 294 x 177 x 108
Maximum weight (kg) 2.7
Rated volume (litres) 0.3
Water connections (BSP) 1/2”
Protection class IP25 IP24

All data quoted at nominal supply voltage

A minimum water pressure of 0.2 MPa (2 bar) is recommended for optimum performance.

Maximum flow rate will be achieved at a water pressure of 0.6 MPa (6 bar).

The appliance must not be subject to more than 1 MPa (10 bar).