The LCD of the instantaneous water heater DEL SLi electronic shows what it can do: Precise temperature control down to the nearest degree. In future, all you need to do is turn the rotary selector until the required temperature appears on the LCD – and that’s it. The electronically-controlled instantaneous water heater accurately captures the flow rate as well as the cold and hot water temperatures, and uses these details to regula…


‧LCD Temperature Display

‧Child-proof system
‧Precise temperature selection from 30℃-60℃
‧Saves up to 30 % energy compared to cylinder systems
‧Profit-Rapid@ for a quick installation
‧For hard and soft water
More functions:
  • 18, 21, 24 kW (adjustable) and 27kW
  • 9.2-13.8 l/min (depending on model)
  • Electronic safety system with air detection
  • Bare wire heating system with pressure-tested copper casing
  • Hoseproof to IP25
  • Anti-scalding protection set to 43℃
  • Wired or wireless comfort remote control (Option)
*Compared hydraulic instantaneous water heaters; subject to pattern of use.
Multi-functional Display

Remote Control Unit:(Optional)

DEL SLi series is compatible with both wired and wireless remote control, easier access and increasing the flexibility while using.


Model DEL 18/21/24 SLi DEL 27 SLi

Power rating(400V)kW

18/ 21/ 24

16.2/ 19/ 21.7



Size (H/W/D)mm 478 x 225 x 105
Temp.  Adjustment 30℃-60℃
Working Pressure 10 Bar
Min. Flow rate ≧2.5L
Protection level IP25
Pipe size 15mm(G1/2″)
Weight 4.3kg
Control unit Electronic Control
Outlet applications Centralized
Multifunction LCD display
Childproof setting 43℃
Bare wire heating system
Elect. air detetion system
Temperature limit
Elect. Flow rate control
Solar operation (preheated water)