STIEBEL ELTRON STE HDB-E 18/21/24 Trend doorstroomverwarmer, 18/21/24 kW, 400 V, wit

With a selectable output of 18, 21, or 24 kW at 400 V, the STIEBEL ELTRON HDB-E 18/21/24 Trend delivers hot water on demand for multiple tap points, from showers to sinks, without the wait or standby losses of a storage tank.

Overview

Engineered in Germany, this wall-mounted, pressure-resistant instantaneous water heater uses a bare wire heating system for rapid heat transfer and precise electronic control. Its A-class energy efficiency keeps consumption low, while the IP25 protection rating ensures safe operation in splash-prone areas.

What stands out

• Three power settings (18/21/24 kW) adapt to your electrical supply and hot water demand.
• Electronic control with adjustable thermostat from 20°C to 60°C for consistent comfort.
• Activates at just 2.5 l/min flow, so even low-flow taps get hot water.
• Compact design fits neatly above the sink or in a utility closet.
• Maximum operating pressure of 1 MPa (10 bar) suits most residential plumbing.

Technical details

• Nominal voltage: 400 V, 3/PE, 50/60 Hz
• Energy efficiency class: A
• Protection class: IP25
• Water connection: G 1/2"
• Max. inlet temperature: 30°C
• Heating system: bare wire
• Control type: electronic
• Colour: white
• Country of manufacture: Germany

Our verdict

The HDB-E 18/21/24 Trend combines flexible power, precise temperature control, and robust safety in a compact package—an excellent choice for efficient, on-demand hot water in any home.