Stiebel DEL 18 Plus Instant Electric Hot Water System

Stiebel DEL 18 Plus Instant Electric Hot Water System

Designed in Germany, the 3-phase, high-performance Stiebel DEL 18 Plus electric instantaneous hot water system provides exact, energy-efficient hot water without a tempering valve by including advanced 3i technology and electronic output control. With memory temperature settings, ECO water-saving modes, and a built-in child safety lock for anti-scalding protection, the DEL 18 Plus—designed for durability and user comfort—is perfect for home and light business use, it guarantees AS3498 criteria’ consistent hot water delivery at up to 50°C.

FEATURES:

Heating Method:
Electric – bare wire heating system with electronic output control

Hot Water Supply:
Instantaneous – heats water on demand, no storage tank required

Recovery Time:
Instantaneous – delivers continuous hot water as required

Installation Location:
Indoor wall-mounted installation (undersink or oversink configuration)

Water Pressure:

  • Maximum: 1000 kPa
  • Minimum operating (switch-on flow rate): 2.5 L/min

Energy Efficiency:
N/A – no energy star rating assigned, but energy-saving ECO modes available

Operating Costs:
Reduced through on-demand heating and selectable ECO levels limiting water flow to 6, 7, or 8 L/min

Best for:

  • Homes with 1–2 bathrooms
  • Apartments and offices
  • Eco-conscious households seeking space-saving electric solutions

Number of Bathrooms and People (Capacity):

  • Suitable for 1–2 bathrooms
  • Best for 2–4 people, depending on local water temperature and application

Additional features:

  • Factory pre-set max outlet temperature of 50°C – no tempering valve needed (AS3498 compliant)
  • ECO Mode with three flow restriction settings (6, 7, 8 L/min)
  • Memory function for two custom temperatures
  • Backlit multifunctional LCD display
  • Child safety and anti-scalding protection via internal limiters
  • Compatible with optional wireless remote control (FFB 4 Set)
  • Built-in diagnostics with fault code display

Specifications

Hot Water Delivery: 9.9 L/min @ 28 K temperature rise (415V)
5.6 L/min @ 50 K temperature rise (415V)
Weight (Empty) Approx. 3.2kg
Height 466 mm
Width 225 mm
Depth 116 mm

Warranties

Manufacturers Tank Warranty (Domestic) 7 years
Manufacturers Parts & Labour Warranty (Domestic) 1 year

Technical Specifications

Powerpoint Required: Permanent connection, 3-phase
Hot Water Connection: G 1/2 (standard BSP thread)
Rated Power: 19.4 kW
Rated Current: 27 A
IP Rating: IP25
Temperature Range: >20°C to 50°C
WaterMark Approved: Licence No. WMKA00301