Stiebel Eltron DEL 18 Plus electric continuous-flow water heater

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Stiebel Eltron DEL 18 Plus Electric Heater

German-engineered continuous-flow electric hot water — precise to half a degree, with zero tank standby losses. Three intelligent sensors hold temperature steady, a 3-stage ECO mode trims energy use, and an anti-scald child-lock keeps things safe.

From $2,043

18 kW

Element

20–50°C

0.5° steps

Multi-tap

Whole home

7 yr

Warranty

Get a free quote Talk to a specialist

Full specifications

Full specs, dimensions and compliance.

Performance

Heating mode

Continuous flow (instantaneous)

Element

18 kW

Temperature range

20–50°C in 0.5°C steps

Control

3-sensor electronic

ECO mode

3-stage (programmable)

Dimensions & install

Size (H × W × D)

466 × 225 × 116 mm

Weight

3.2 kg

Mount

Wall, hardwired

Power

380–415 V 3-phase

Safe tray / flue

Not required

Compliance & warranty

Standards

WaterMark AS3498

Anti-scald

Child-lock included

Plumbing

Licensed plumber required

Electrical

3-phase, licensed electrician

Warranty

7 years (domestic, parts & labour)

What's supplied

Complete continuous-flow heater.

A premium whole-of-home electric heater shipped sealed from the manufacturer. Feeds multiple draw-off points simultaneously when correctly sized — your trade will set the temperature curve at commissioning.

Stiebel Eltron DEL 18 Plus continuous-flow unit
Electronic 3-sensor controller (built-in)
Anti-scald child-lock (factory enabled)
Wall-mount bracket and fixings
Inlet & outlet fittings
Stiebel Eltron installation manual + commissioning card
Free delivery within Perth metro (Alkimos–Mandurah)

Standards & install

Australian-compliant install.

WaterMark certified, made in Germany, and approved for installation in all Australian states. 3-phase electrical and licensed plumbing are mandatory:

WaterMark AS3498 — instantaneous water heaters
AS/NZS 3500 — plumbing & drainage
AS/NZS 3000 — electrical installations (3-phase)
Licensed electrician & plumber required for connection

We deliver the DEL 18 Plus to your site (free within Perth metro). 3-phase wiring, plumbing rough-in and council sign-off are arranged by your licensed trades — talk to us about recommended installers.

Get started today

Endless hot water
without the cylinder.

Tell us your fixtures, supply phase and water inlet temperature — we'll confirm the DEL 18 Plus is correctly sized and send a quote with delivery.

No obligation

Prompt response

Free Perth metro delivery

7 yr manufacturer warranty