The Stiebel Eltron DCE-S 6/8 Plus is a compact, wall-mounted instantaneous water heater that heats water only as it flows through the unit, delivering a steady supply of hot water on demand with no cylinder, no standby losses, and no waiting around. It is suitable for one or two draw-off points, such as a kitchen sink and washbasin, or a single shower.
At its core is Stiebel Eltron's 3i technology: three sensors work with electronic closed-loop output control to deliver the exact temperature selected, accurately and consistently, without needing to add cold water at the tap. The manufacturer rates this as achieving energy and water savings of up to 30% compared with less precise electric water heaters.
6.6 / 8.7 kW
Rated output (230V)
20–60°C
Temperature range
3i Technology
3-sensor closed-loop control
Class A
Energy efficiency
Good to Know
The internally adjustable safety temperature limit can be fixed at 43°C, 50°C or 55°C for anti-scalding protection — useful where the unit serves a washbasin used by children or vulnerable household members.
Please Note
This is the 6/8 Plus variant (rated output up to 8.7 kW), suitable for 1–2 draw-off points. Stiebel Eltron also offers the DCE-S 10/12 Plus (up to 13.1 kW) for higher-demand single-shower installations — check your incoming water temperature and required flow rate before choosing between the two.
Key Features
3i electronic technology
Three sensors combine with electronic closed-loop control to hold the selected temperature accurately at all flow rates, cutting energy and water waste versus simpler thermal-cutout heaters.
Precise rotary temperature control
An ergonomic rotary selector gives infinitely variable adjustment from 20°C to 60°C, switchable between °C and °F display.
Adjustable scald protection
The safety temperature limit can be internally fixed at 43°C, 50°C or 55°C, giving installers control over the maximum deliverable temperature.
Compact, space-saving design
At just 217 × 372 × 109 mm and 2.5 kg, it fits neatly under a sink, in a cupboard, or in any tight utility space.
PROFI-RAPID installation system
Direct fitting through the appliance back panel compensates for drill-hole discrepancies, and the cover opens on a single central screw for fast servicing.
Flexible water and electrical connections
1/2" brass water connections at the bottom suit finished-wall installs, while electrical connection can be made at the bottom, side, or top depending on wall condition.
Multi-stage electronic safety concept
Includes air bubble detection and a rapid bare-wire heating element suitable for both hard and soft water.
LED diagnostic display
Built-in LED fault-analysis lights speed up troubleshooting, and the complete inner assembly lifts out from the back panel for easy maintenance.
Where It Works Best
Small households & guest bathrooms
Reliable hot water for a washbasin or kitchen sink without running a cylinder for occasional use.
Holiday lets & annexes
Instant, on-demand hot water with no standing heat loss when the property is unoccupied.
Compact commercial spaces
Suited to cafés, clinics, or utility rooms needing dependable hot water from a small footprint.
Preheated water systems
Suitable for reheating pre-warmed water from solar thermal or heat pump systems, only adding the energy needed to reach the target temperature.
Technical Specifications
Electrical & Performance
Rated output (230V)
6.6 / 8.7 kW
Rated current
28.5 / 38.0 A
Fuse protection
30 / 40 A
Phases
1/N/PE (single phase)
Temperature adjustment range
20–60°C
Switch-on water flow rate
1.3 l/min
Energy efficiency class
A
Construction & Fitting
IP rating
IP25 (hoseproof)
Water connection
1/2" brass, bottom-mounted
Dimensions (H × W × D)
372 × 217 × 109 mm
Range / Part no.
DCE-S / 238153
Country of manufacture
Germany
Frequently Asked Questions
How many taps can the DCE-S 6/8 Plus supply?
It is designed for one or two draw-off points, such as a kitchen sink and a washbasin used one at a time, or a single shower.
What is 3i technology?
It refers to Stiebel Eltron's three-sensor electronic closed-loop control, which continuously adjusts heating output to deliver the exact selected temperature without needing to mix in cold water at the tap — the manufacturer states this can save up to 30% in energy and water versus less precise controls.
Can the temperature be limited for safety?
Yes. An internally adjustable static temperature limit can be set to 43°C, 50°C or 55°C to reduce scalding risk.
Does it need a specific fuse or circuit?
Yes — the unit requires a dedicated 30/40 A circuit depending on the selected output, on a single-phase 230V supply. Installation must be carried out by a qualified electrician in line with wiring regulations.
Is it suitable for hard water areas?
Yes. The rapid bare-wire heating element is suitable for both hard and soft water.
What is the difference between the 6/8 Plus and 10/12 Plus?
The 10/12 Plus delivers a higher rated output (up to 13.1 kW) for greater flow at a given temperature rise, making it better suited to single-shower installations with higher hot water demand, while the 6/8 Plus reviewed here suits washbasin and dual-sink applications.
