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Stiebel Eltron DHE 18/21/24 - 204284 Set (Three Phase) Touch Instantaneous Water Heater 4i Technology

Made & Engineered in Germany
Stiebel Eltron DHE 18/21/24 - 204284 Set (Three Phase) Touch Instantaneous Water Heater 4i Technology
Stiebel Eltron DHE 18/21/24 - 204284 Set (Three Phase) Touch Instantaneous Water Heater 4i Technology
  • Fully electronic output control with 4i technology
  • Suitable for 2 basins + 1 cleaners sink + 1 bath or 2 showers
  • Internal temperature limit can be adjusted to 55°C, 50°C or 43 °C
  • ECO mode for maximum energy efficiency
  • Consumption display
  • Temperature memory buttons for quick selection

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Quick Find: 17824
Part Code: 204284 - 202656 Set No

Weight: 3.10 Kg

This product is currently awaiting on stock arrival and due in soon.

This product is currently awaiting on stock arrival and due in soon.

Backorder now to secure your delivery or sign up to be notified when this product is back in stock.

Free Delivery Available*
£673.85 ex VAT
£808.62 inc VAT
£808.62 inc VAT
£673.85 ex VAT
Stock Available: 9 Units


Estimated delivery: 1 working days

Day of Choice Delivery Available

Made To Order This is a made to order product and therefore cannot be returned or cancelled

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  • Comfort instantaneous water heater suitable for DHW supply to multiple draw-off points (single and group supply), e.g. simultaneous supply to the bathroom and kitchen
  • Sealed unvented, pressure-tested appliance for use with all commercially available pressure taps
  • Suitable for 2 basins + 1 cleaners sink + 1 bath or 2 showers


  • Instantaneous water heater with full electronic control and 4i technology
  • Accurate temperature delivery at all times thanks to electronic flow rate control
  • Variable, digital temperature selection via rotary selector, temperature adjustment in 0.5 °C increments
  • Backlit multifunction display to show values such as set temperature, current power consumption, energy consumption, flow rate, time, status and service information
  • ECO button
  • 2 temperature memory buttons for programmable preferred temperatures
  • 4 wellness shower programs, automatic bath filling
  • LED scalding risk indicator at temperatures above 43 °C or unexpectedly high outlet temperatures caused by preheated water; displays the inlet temperature in the lower section
  • Individually adjustable temperature limit (childproofing)
  • Optional convenient remote control available
  • Rotatable appliance cover and programming unit for increased operating convenience in undersink installations


  • Energy and water savings of up to 30 % through full electronic output control with 4i technology
  • 3 sensors and an additional motorised valve ensure accurate temperature delivery at all times. For this, only the amount of energy actually required 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 particularly economical operation
  • Transparent energy and water consumption
  • Suitable for preheated water (e.g. in solar thermal and heat pump systems)
  • Profi-rapid innovative installation
  • An improved installation system for even quicker and simpler installation
  • Easy replacement of all conventional instantaneous water heaters
  • Easy wall mounting: Universal mounting rail with integrated compensation for unevenness in the wall and drill hole discrepancies; designed to match commonly used fixing points
  • Fast and universal water connection
  • Enlarged installation area with pivoting cold water inlet, threaded water fittings, twin nipple technology for easy replacement, installation on finished/unfinished walls with 3-way shut-off, suitable for plastic pipes (observe manufacturer's instructions).
  • Straightforward electrical connection: From above or below; cable entry gland for cable


  • Fault memory can be called up on the display for fault analysis, plus LED diagnostic traffic lights
  • Inner assembly can be removed using the handle



  • Rapid bare wire heating system, suitable for hard and soft water
  • Electronic safety concept with air bubble detection
  • Anti-scalding protection adjustable only by qualified contractors, for permanent limiting of the water outlet temperature to max. 43°C, 50°C or 55 °C

Technical specifications

BrandStiebel Eltron
Depth116 mm
Dimensions225 x 466 mm
Electric heater typeInstant Water Heaters
Energy efficiency classA
Frequency50/60 Hz
Height466 mm
IP ratingIP25
Load (KW)18/21/24 KW
Rated current29/31/35 A
Rated output18/21/24 kW
Rated voltage400 V
Temperature adjustment20-60 °C
Width225 mm

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Product reviews

5.0100% Positive (3 reviews)

Ratings based on data collected by third party reviewing platform.

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M Spencer, West Sussex
28 June 2023 09:13

As expected brilliant item well made and does the job you want it to do.

Brilliant Web site very informative and well laid out, excellent communication from placing the order to confirming its delivery and above all very good pricing.

Thank you so much for your 5-star review! We will share this with the team to let them know to keep up the amazing work.


Muhammad Mulakhill
3 September 2021 08:48

This is the third one I installed. 24kW 3 phases. Wow.

I asked for next day delivery, they promised, and lived up to it.

Thank you so much for taking the time to leave an excellent rating. We really appreciate your business.


Robert Burton
11 August 2021 08:42

As noted, easy to identify and order.

After identifying the part required, a simple procedure to place the order and make the payment, arrived the next day ( Top Marks ).

Thank you for the 5 star review! We appreciate you taking the time to complete this.
It is lovely to hear you had a great experience with us.

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