Stiebel Eltron DEM Instantaneous Water Heater

Application • This mini instantaneous water heater with electronic closed-loop control can supply DHW to one washbasin. • Can be operated with pressure taps or non-pressurised taps.

Convenience features • Mini instantaneous water heater with closed-loop control, control electronics, outlet temperature sensor and variable flow rate limitation. • Accurate temperature delivery up to the maximum output. Internal temperature limiting • Including special aerator for perfect water flow pattern and integral flow controller for use in existing taps. • Anti-scalding protection for high inlet temperatures via automatic output matching. • Oversink or undersink installation possible.

Efficiency • Electronic output control for energy efficient and water saving operation. The outlet temperature sensor and control electronics ensure that the set temperature is achieved to the exact degree. For this, only the amount of energy required is expended; there is no need to add cold water at the tap. • The water is heated directly at the draw-off point and only when required. This prevents the energy and water losses caused by long pipe runs. This ensures maximum energy efficiency. • Suitable for preheated water from solar thermal and heat pump systems.

Installation • Time saving and easy installation with the PROFI-RAPID installation system. Straightforward wall mounting with 2-point attachment. The back panel simultaneously acts as a drill template; slots compensate for drill hole discrepancies. • The appliance cover and internal assembly can be removed with just one hand movement. • Fast water connection thanks to external metal water fittings for direct, universal installation of taps. • Simple electrical connection as power cable is wired up as standard. • Fault analysis with LED diagnostic traffic light.

Safety • Maintenance-free bare wire heating system, suitable for hard and soft water. • Safety system with high pressure switch and electronic temperature monitoring.


  • Accurate temperature delivery up to the maximum output
  • Special aerator for perfect flow pattern
  • Internal permanent set temperature for childproofing and anti-scalding protection
  • Supplies one hand washbasin at maximum efficiency due to electronic closed-loop control
  • Instant hot water thanks to rapid and maintenance-free bare wire heating system
  • At inlet temperatures > 20 °C, also suitable for showers
  • Suitable for oversink and undersink installation with a single appliance
  • Can be operated with pressurised and non-pressurised taps


Please see 'DEM Water Heater Data Sheet' in the files collection tab

UK Stockholder

We are a proud stockist of Stiebel Eltron products; items are usually on the shelf and picked the same day. On occasion we will need to order certain items directly from the UK distributer. 

Familiar Logistics Companies

Smaller items are dispatched with DPD on a next working day service. We will inform you that the item has been shipped, DPD will then send an update with the consignment information and follow up the next morning with a 1-hour delivery slot. Should you not be available for whatever reason DPD have a few convenience options to choose from.

Delivered Safely

For slightly larger products the delivery will usually be scheduled in with you. Larger Stiebl Eltron products such as heat pumps, or multiple items are palletised to ensure they arrive safely. Tracking for pallet deliveries is limited to a day slot but we will endeavour to make this as convenient as possible. We have limited control over 3rd party couriers, but you should find the driver polite and accommodating.

Any Difficulties Please Call Us

Please bear in mind that whilst we do everything, we can to ensure a predictable service there are sometimes circumstances that are out of our control. If you experience any issues with your delivery, please call the sales team on 03301656200 and they will do everything they can to help. 

Top Quality Products

Stiebel Eltron have been a world leader in heating and energy-saving technology for the past 100 years so we have every confidence in their products. We stand behind the quality of our products and are confident they will last you longer than just one year but why not take advantage of our Aircare Extra warranty for 'extra' peace of mind.


We offer a 1-year extended warranty on this product for extra peace of mind.

After Sales Support

At Aircare, we prioritise your satisfaction above all else. Rest assured that if you experience any issues with our products, we will do everything possible to resolve them over the phone. If further assistance is required, we will connect you with one of the Stiebl Eltron Engineers in the UK.

We are Here to Help

Whether a repair or replacement is necessary, we will handle it swiftly and seamlessly for you. We understand that warranty claims can be a significant hassle, which is why we strive to make the process as easy, prompt, and stress-free as possible. Your peace of mind is our top priority!

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Stiebel Eltron DEM Instantaneous Water Heater

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As low as £253.20
Sku: DEM

Why buy me?

  • Accurate temperature delivery 
  • Special aerator for perfect flow pattern
  • Rapid and maintenance-free bare wire heating system 
  • Ideal for pressurised and non-pressurised taps