The Story
The Stiebel Eltron DEM 6 Set (product no. 236463) is a 5.7 kW mini instantaneous water heater offering the highest output in the DEM Set family. It delivers a steady, electronically controlled hot water supply to a hand washbasin and — at inlet water temperatures above 20 °C — is also suitable for shower use, giving it broader application potential than the lower-output DEM 3 variant. The unit features full electronic closed-loop temperature control via an outlet sensor, ensuring the water reaches the set temperature without cold-blending at the tap. The hardwired connection requires a dedicated 25 A RCD-protected circuit and installation by a qualified electrician. Equally suited to oversink and undersink mounting and compatible with both pressurised and non-pressurised taps, the DEM 6 Set is the professional choice for cloakrooms, commercial washrooms, beauty salons, and any single draw-off point demanding maximum instantaneous hot water performance from a compact wall-mounted unit.
Key Features
A dedicated outlet temperature sensor feeds continuous data to the onboard control electronics. Output is adjusted in real time so the water exits at exactly the set temperature. No cold-blending is required at the tap, meaning every litre of water drawn is at the correct temperature — eliminating energy waste and delivering consistent comfort.
With 5.7 kW available at 230 V and a switch-on flow rate of >2.2 l/min, the DEM 6 Set provides sufficient thermal output to supply a shower head when the cold-water inlet temperature is above 20 °C. This makes it a versatile solution for beach huts, garden rooms, leisure facilities, and commercial washrooms where a second draw-off point may be added.
The maintenance-free bare wire heating system transfers heat directly into the water stream, delivering hot water instantly from the moment the tap opens. The element is rated for both hard and soft water, and its open-wound construction resists scale formation that can shorten the life of conventional sheathed elements.
Dual-layer protection: automatic output matching reduces heating power if inlet temperature rises unexpectedly, while a fixed internal temperature limit (set by a qualified contractor) provides a permanent backstop. Together these protect against scalding regardless of mains temperature fluctuations.
The back panel doubles as a precision drill template, with elongated slots to tolerate drill-hole placement errors. Two-point wall fixing is all that is required. Cover and internal assembly detach in a single hand movement for fast access during commissioning and future servicing. External metal G 3/8 A water fittings allow direct tap connection.
Rotating the appliance 180° switches between oversink and undersink configurations without any component changes. Water connections and cable routing are designed to suit either orientation, giving maximum flexibility when working around existing pipework or cabinetry.
The integral variable flow-rate limiter and special aerator ensure the DEM 6 Set performs consistently with both open-outlet non-pressurised taps and standard pressurised taps. The aerator delivers an optimised flow pattern at the spout for a comfortable handwashing experience.
A built-in three-LED diagnostic indicator provides at-a-glance fault analysis during commissioning and service visits, enabling rapid identification of electrical, water-flow, and control issues without specialist diagnostic equipment.
By heating water at the draw-off point and only when the tap is open, the DEM 6 Set eliminates standing heat losses and pipework dead-leg waste. No stored volume is kept hot between uses, so energy consumption tracks actual demand — particularly valuable in applications with intermittent or low-frequency use.
Technical Specification
| Identification | |
|---|---|
| Product Number | 236463 |
| Model | DEM 6 Set |
| Electrical | |
| Rated Voltage | 230 V (1/N/PE) |
| Rated Output at 230 V | 5.7 kW |
| Rated Output at 200 V | 4.3 kW |
| Rated Output at 220 V | 5.2 kW |
| Rated Output at 240 V | 6.2 kW |
| Rated Current at 230 V | 24.7 A |
| Circuit Fuse (200–230 V) | 25 A |
| Circuit Fuse at 240 V | 32 A |
| Frequency | 50 / 60 Hz |
| Connection | 1/N/PE — hardwired, 4 mm² cable, 25 A DP isolator required |
| Water | |
| Water Connection | G 3/8 A (external metal fittings) |
| Switch-On Flow Rate | > 2.2 l/min |
| Water Resistivity ρ₁₅ ≥ (inlet ≤ 25 °C) | 1000 Ω·cm (conductivity ≤ 1000 µS/cm) |
| Water Resistivity ρ₁₅ ≥ (inlet > 25 °C) | 1300 Ω·cm (conductivity ≤ 770 µS/cm) |
| Performance | |
| Outlet Temperature Range | 30–50 °C (user-adjustable) |
| Internal Anti-Scalding Limit | Fixed — qualified contractor only |
| Control Method | Electronic closed-loop (outlet sensor) |
| Shower Suitability | Yes — at inlet temperatures > 20 °C |
| Physical | |
| Height | 143 mm |
| Width | 190 mm |
| Depth | 82 mm |
| Weight | 1.70 kg |
| Colour | White |
| IP Rating | IP25 (splash-proof) |
Frequently Asked Questions
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Description
The Stiebel Eltron DEM 6 Set (product no. 236463) is a 5.7 kW mini instantaneous water heater offering the highest output in the DEM Set family. It delivers a steady, electronically controlled hot water supply to a hand washbasin and — at inlet water temperatures above 20 °C — is also suitable for shower use, giving it broader application potential than the lower-output DEM 3 variant. The unit features full electronic closed-loop temperature control via an outlet sensor, ensuring the water reaches the set temperature without cold-blending at the tap. The hardwired connection requires a dedicated 25 A RCD-protected circuit and installation by a qualified electrician. Equally suited to oversink and undersink mounting and compatible with both pressurised and non-pressurised taps, the DEM 6 Set is the professional choice for cloakrooms, commercial washrooms, beauty salons, and any single draw-off point demanding maximum instantaneous hot water performance from a compact wall-mounted unit.
Key Features
A dedicated outlet temperature sensor feeds continuous data to the onboard control electronics. Output is adjusted in real time so the water exits at exactly the set temperature. No cold-blending is required at the tap, meaning every litre of water drawn is at the correct temperature — eliminating energy waste and delivering consistent comfort.
With 5.7 kW available at 230 V and a switch-on flow rate of >2.2 l/min, the DEM 6 Set provides sufficient thermal output to supply a shower head when the cold-water inlet temperature is above 20 °C. This makes it a versatile solution for beach huts, garden rooms, leisure facilities, and commercial washrooms where a second draw-off point may be added.
The maintenance-free bare wire heating system transfers heat directly into the water stream, delivering hot water instantly from the moment the tap opens. The element is rated for both hard and soft water, and its open-wound construction resists scale formation that can shorten the life of conventional sheathed elements.
Dual-layer protection: automatic output matching reduces heating power if inlet temperature rises unexpectedly, while a fixed internal temperature limit (set by a qualified contractor) provides a permanent backstop. Together these protect against scalding regardless of mains temperature fluctuations.
The back panel doubles as a precision drill template, with elongated slots to tolerate drill-hole placement errors. Two-point wall fixing is all that is required. Cover and internal assembly detach in a single hand movement for fast access during commissioning and future servicing. External metal G 3/8 A water fittings allow direct tap connection.
Rotating the appliance 180° switches between oversink and undersink configurations without any component changes. Water connections and cable routing are designed to suit either orientation, giving maximum flexibility when working around existing pipework or cabinetry.
The integral variable flow-rate limiter and special aerator ensure the DEM 6 Set performs consistently with both open-outlet non-pressurised taps and standard pressurised taps. The aerator delivers an optimised flow pattern at the spout for a comfortable handwashing experience.
A built-in three-LED diagnostic indicator provides at-a-glance fault analysis during commissioning and service visits, enabling rapid identification of electrical, water-flow, and control issues without specialist diagnostic equipment.
By heating water at the draw-off point and only when the tap is open, the DEM 6 Set eliminates standing heat losses and pipework dead-leg waste. No stored volume is kept hot between uses, so energy consumption tracks actual demand — particularly valuable in applications with intermittent or low-frequency use.
Technical Specification
| Identification | |
|---|---|
| Product Number | 236463 |
| Model | DEM 6 Set |
| Electrical | |
| Rated Voltage | 230 V (1/N/PE) |
| Rated Output at 230 V | 5.7 kW |
| Rated Output at 200 V | 4.3 kW |
| Rated Output at 220 V | 5.2 kW |
| Rated Output at 240 V | 6.2 kW |
| Rated Current at 230 V | 24.7 A |
| Circuit Fuse (200–230 V) | 25 A |
| Circuit Fuse at 240 V | 32 A |
| Frequency | 50 / 60 Hz |
| Connection | 1/N/PE — hardwired, 4 mm² cable, 25 A DP isolator required |
| Water | |
| Water Connection | G 3/8 A (external metal fittings) |
| Switch-On Flow Rate | > 2.2 l/min |
| Water Resistivity ρ₁₅ ≥ (inlet ≤ 25 °C) | 1000 Ω·cm (conductivity ≤ 1000 µS/cm) |
| Water Resistivity ρ₁₅ ≥ (inlet > 25 °C) | 1300 Ω·cm (conductivity ≤ 770 µS/cm) |
| Performance | |
| Outlet Temperature Range | 30–50 °C (user-adjustable) |
| Internal Anti-Scalding Limit | Fixed — qualified contractor only |
| Control Method | Electronic closed-loop (outlet sensor) |
| Shower Suitability | Yes — at inlet temperatures > 20 °C |
| Physical | |
| Height | 143 mm |
| Width | 190 mm |
| Depth | 82 mm |
| Weight | 1.70 kg |
| Colour | White |
| IP Rating | IP25 (splash-proof) |
Frequently Asked Questions
