DEL 18 / 27 Plus

The DEL Plus is suitable for supplying hot water to several draw-off points (single and group supply), e.g. simultaneous supply to bathroom and kitchen. Sealed unvented, pressure-tested appliance for use with all commercially available pressure taps. The DEL Plus water heater requires no safe tray, flue or ventilation.

Electronically controlled instantaneous water heater with 3i technology. Accurate temperature delivery up to the maximum output. Temperature selection from 30 to 50°C via rotary selector, temperature adjustment for showers in 0.5 °C increments. Backlit multi-function display to show set temperature, current power consumption, status and service indication. Selectable ECO mode. Memory function for 2 programmable temperatures of choice. Pivoting appliance cover and programming unit for increased operating convenience in under-sink installations.

Saves energy and water by means of electronic output control with 3i technology. 3 sensors ensure that the selected temperature is accurately achieved. For this, only the actual required amount of energy is expended; there is no need to add cold water at the tap. This ensures maximum energy efficiency. ECO mode can be individually selected for economical operation. Suitable for preheated water (e.g. in solar thermal and heat pump systems).

Rapid bare wire heating system, suitable for hard and soft water. Electronic safety concept with air bubble detection.

Contact your local energy provider and inform them of your address. They will be able to let you know if you have three-phase power available at your address.

You will need to check with your electrician to find out how much three-phase power is available in "Amps per phase". The DEL 18 Plus water heater requires 27 Amps per phase, and the DEL 27 Plus requires 40 Amps per phase.

You will need to confirm the amperage supply to the hot water unit from the circuit breaker in the switchboard. Please contact us to confirm the appropriate instantaneous electric hot water system.

Underneath the dial that adjusts the temperature there is a flap that pulls forward and then drops down. A rating label is located up under the flap showing the model and size - DEL 18 Plus or DEL 27 Plus.  Within the downloads section of the DEL Plus, you can download a pdf showing you exactly where and how to locate this sticker.

The STIEBEL ELTRON DEL Plus instantaneous electric water heater delivers hot water not exceeding 50 degrees Celsius in accordance with AS3498, overcoming the need for a temperature control device in hygienic areas where hot water must be limited to 50°C.

No, the DEL Plus hot water system delivers hot water not exceeding 50 degrees Celsius in accordance with AS3498, overcoming the need for a tempering valve in hygienic areas where the water must be limited to not exceed 50 degrees Celcius.

The DEL Plus water heater can be installed almost anywhere due to its compact size. The water heater does not require ventilation, relief drain or safe trays so it can be installed in a cupboard, in the roof space, below the sink, in a service cavity, in a Euro laundry just to name a few options. If installing outdoors, the hot water system must be protected from the elements by a protective covering such as a meter box.

The DEL Plus water heaters are designed to be installed as close as practical to the most used hot water outlet. Installing closer to the point of use can help to save water and energy by delivering hot water quickly to the outlet. The STIEBEL ELTRON 3 phase electric instantaneous water heaters are designed to service multiple outlets located several metres away from the system.

Compared to a storage hot water unit an electric instantaneous water heater can be up to 30% more efficient. This is due to the water heater not storing any hot water and not having heat losses from storing a body of hot water.