Stiebel Eltron / Instantaneous electric
Stiebel Eltron DEL 18 Plus
A compact three-phase system that heats water as it flows, with electronic temperature control and a digital display.
- Electrical supply
- Three phase
- Rated output at 415 V
- 19.4 kW
- Rated current at 415 V
- 27 A per phase
- Temperature adjustment
- 20–50°C
- Dimensions (H × W × D)
- 466 × 225 × 116 mm
- Manufacturer article number
- 236741
Hot water without a storage tank
The DEL 18 Plus heats water on demand. Its electronic controls let you choose a temperature on the unit’s display.
Electrical supply matters
An existing instantaneous system does not automatically mean this model will suit the property. The available electrical capacity, water demand and installation location need to be assessed.
Ask Lee whether he can help with this model and confirm availability before requesting installation. Any quote depends on the requirements at your property.
Electrical figures above are for a 415 V supply.
Product details were checked against the Stiebel Eltron manufacturer page on 5 October 2026. Refer to the manufacturer’s current installation and warranty documents for full conditions.
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