STIEBEL ELTRON DHB18/21/24ST Trend vs HDB-E18/21/24 Trend Comparison

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DHB18/21/24ST Trend

Stiebel Eltron DHB18/21/24ST Trend Electronic Control Instantaneous Water Heater

HK$3,688 ~~HK$6,670~~

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HDB-E18/21/24 Trend

STIEBEL ELTRON HDB-E18/21/24 Trend Electronic Control Water Heater

HK$2,489 ~~HK$4,105~~

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Side by side

DHB18/21/24ST Trend HDB-E18/21/24 Trend

DHB18/21/24ST Trend offers rotary temperature adjustment from 20°C to 60°C; HDB-E18/21/24 Trend offers presets of 35°C, 43°C, 50°C and 55°C.
DHB18/21/24ST Trend specifies a start flow rate above 3 L/min; HDB-E18/21/24 Trend specifies a minimum flow rate of at least 2.5 L/min.
DHB18/21/24ST Trend lists dimensions of 466 × 225 × 116 mm. HDB-E18/21/24 Trend lists the same dimensions in its specifications, but its Attributes list 466 × 225 × 105 mm.
HDB-E18/21/24 Trend has a factory-default temperature of 55°C, with lower temperatures requiring adjustment by a qualified electrician. DHB18/21/24ST Trend specifies a rotary temperature selector.

Item	DHB18/21/24ST Trend	HDB-E18/21/24 Trend
Heater type	Instantaneous electric water heater
Control system	Electronic control	Fully electronic control in features; electronic control in specifications
Temperature selection	20°C–60°C, adjustable using a rotary selector	Preset options: 35°C / 43°C / 50°C / 55°C
Factory-default temperature	Not specified	55°C
Temperature adjustment requirement	Rotary selector	A qualified electrician must change the setting if a temperature below the factory-default 55°C is required
Power rating at 400 V	18 / 21 / 24 kW
Power rating at 380 V	16.2 / 19 / 21.7 kW
Power selection	18, 21 or 24 kW selected upon installation	Selectable 18, 21 or 24 kW, depending on model variant
Power supply phase	Not specified	3-phase
Dimensions	H × W × D: 466 × 225 × 116 mm	Specifications, H × W × D: 466 × 225 × 116 mm; Attributes size: 466 × 225 × 105 mm
Weight	2.9 kg
Heating system	Bare wire heating system
Water suitability	Suitable for hard and soft water areas
Start / minimum flow rate	Start flow rate: >3 L/min	Minimum flow rate: ≥2.5 L/min
Maximum working pressure	1.0 MPa (10 bar)	Up to 10 bar
Minimum working pressure	0.02 MPa (0.2 bar)	Not specified
Protection rating	IP25
Water protection description	Protected against water jets	Hoseproof
Pipe connection	15 mm (G1/2″)
Outlet applications	Single or multiple outlets
Electronic air detection	✅
Electronic flow rate control	❌ Not specified	✅
Childproof / anti-scalding settings	Selectable childproof anti-scalding settings: 43°C / 50°C / 55°C	Features list anti-scalding settings of 35°C / 43°C / 50°C / 55°C; specifications list a childproof preset of 55°C
Compatible with solar-preheated water	✅
Installation system	Profi-Rapid® installation system	Not specified
Optional remote control	FB1 LCD Trend wired remote control, available as an optional accessory
Energy-saving claim	Not specified	Up to 30% energy savings compared with traditional cylinder systems, subject to usage patterns
Country of origin	Germany
Warranty	2 years

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