DHE 18 AU / DHE 27 AU

DHE instantaneous water heater - an unfailing guarantee of hot water at exactly the right temperature.
The fully electronic DHE instantaneous water heater provides hot water at the exact temperature you have set - every time. 4i technology guarantees that any factors which would change the outlet temperature are compensated for. This way you can enjoy a shower in comfort, even when someone is washing their hands at the adjacent washbasin.

Top-quality in operation too.
Due to the special haptic rotary selector, the appliance is very easy to operate: settings and adjustments are intuitive and take very little time. The set water temperature, ECO level and current power consumption can be seen clearly and concisely on the illuminated multifunction display. Energy consumption, flow rate, time, status and service display can be checked in the lower area.

Contact your local energy provider with your address. They will confirm if three-phase power is available at your property.

You will need an electrician to confirm the available supply in amps per phase. The DHE 18 AU requires 27 A per phase, while the DHE 27 AU requires 40 A per phase.

Check the amperage supply from the circuit breaker feeding your current unit. Contact our team to confirm the most suitable STIEBEL ELTRON replacement model.

Sizing depends on the number of outlets and the incoming cold water temperature. As a guide:
• For a 1-bathroom apartment or house: a 19.4 kW unit (e.g. DHE 18 AU, DEL 18 Plus, or DHB-E 18 LCD) is suitable.
• For a 2-bathroom house: a 28–29.1 kW unit (e.g. DHE 27 AU, DEL 27 Plus, or DHB-E 27 LCD) is recommended.

The DHE 18 AU and DHE 27 AU can deliver hot water up to 60°C. For domestic bathrooms, plumbing regulations require a temperature control device to limit delivery to 50°C. Alternatively, the STIEBEL ELTRON DEL AU delivers water not exceeding 50°C in accordance with AS3498. Learn more about the DEL AU.

The compact size of the DHE AU makes it highly versatile. It does not require ventilation, a relief drain, or a safe tray, so it can be installed in cupboards, under sinks, roof spaces, service cavities, or Euro laundries. For outdoor use, the unit must be protected from the weather with a covering such as a meter box.

The DHE AU should be installed as close as possible to the most frequently used outlet to minimise water and energy waste. However, it is designed to serve multiple outlets located several metres away.

Instantaneous electric water heaters can be up to 30% more efficient than storage systems, as they only heat water when required and avoid standing heat losses.

The DHE AU range is available from all leading plumbing supply stores across Australia.