Durawatt

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Electric water heater, 18 - 360 kW, 125 - 600 gallon tanks

Durawatt® is a heavy-duty, medium to large capacity electric water heater. Design avoids large, high-kilowatt tube bundles that can be difficult to maintain. Instead, individual heating elements rated at 9 or 18kW are combined for higher recovery requirements. Standard heating elements are Incoloy sheathed with bronze mounting flanges (optional sheathing material available). Proportional sequencing of heating elements is optional.


Features and Benefits

  • 98% thermal efficiency  
  • Customized heaters with higher inputs
  • Maximum kW varies by tank (consult submittal documents)
  • Heating elements can be energized in up to 10 stages
  • 480V 3-phase standard construction
  • Optional voltages: 208/1, 240/1, 208/3, 240/3, 380/3, 600/3
  • Modbus connectable electronic operating controls

 

AquaPLEX Corrosion Protection

  • Highly durable AquaPLEX® engineered duplex stainless steel storage tank
  • Corrosion-resistant in potable water at any temperature
  • Highly resistant to chloride stress corrosion cracking
  • No lining required
  • Non-ferrous, removable tank connections
  • No anode rods required or used


Warranty

  • 25-year AquaPLEX tank and heat exchanger corrosion warranty (15 years full, 10 years prorated)
  • One-year parts warranty
  • First-year service policy (freight and labor coverage)
  • Long-life service policy (optional)


Certifications

  • Meets ASHRAE 90.1-2010
  • Heaters qualify for LEED certification
  • ETL listed to ANSI/CSA safety standards
  • FM compliant
  • ASME, section IV, part HLW stamped and National Board Registered

 

Custom Fabrication:

  • ASME section VIII, high pressure and/or high temperature (>160 psi)
  • ASME heaters for RO or de-ionized water

Features

  • Electric water heater
  • 18 - 360 kW
  • 125 - 600 gallon tanks

Literature

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Customer Support Access BIM Drawings

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Approval/Certification Information

For product-specific approval information, please refer to the product’s specification sheet or ask a Watts representative. For general information regarding any approval certification partners identified in the specification sheet, please visit our certification partners’ websites:


ASSE CSA FM Approvals NSF
UL ULC USC WQA