DEL 18 / DEL 27 Plus 3 Phase Electric Instantaneous Water Heater - Heating & Cooling NZ | ArchiPro

DEL 18 / DEL 27 Plus 3 Phase Electric Instantaneous Water Heater

The STIEBEL ELTRON DEL Plus three-phase 415V electric mains pressure instantaneous hot water systems provide instant hot water up to a maximum of 50°C with the reliability you have come to expect from STIEBEL ELTRON. These instant hot water heaters utilise sophisticated electronic technology to maintain a hot water delivery temperature not exceeding 50°C. This overcomes the need for a separate tempering valve in situations where 50°Celsius hot water is required.

Engineering excellence from STIEBEL ELTRON

  • Made in Germany, designed for New Zealand conditions
  • Electronically controlled to accurately regulate the water temperature
  • Electronic safety system with air detection
  • LED display shows hot water temperature selection
  • Memory function and TMax function for premium comfort and safety
  • WaterMark Lic No. WMKA00301, AS3498

Efficient by design

  • Heats water to a maximum of 50°C
  • Point of use installation saves water by not waiting for hot water to arrive at the outlet
  • The three-phase water heater saves power due to the fact that no water is stored

Installation flexibility

  • Maximum hot water output temperature 50°C, no tempering valve needed (complies with the G12 New Zealand Building Code)
  • Bare wire element provides quick control over the water temperature and is suitable for hard or soft water areas
  • Compact in size for space saving installation
  • No safe tray required
  • No ventilation required

Available in electrical size:

  • DEL 18 AU - 19.4kW, 27 Amps per phase, three phase 415V
  • DEL 27 AU - 28kW, 40 Amps per phase, three phase 415V


  • 5 year full parts and labour domestic warranty*

*Conditions apply - refer warranty policy for full details.

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