opti15 | 15kW 240V 3.0GPM 25-Year Warranty Electric Tankless Water Heater

opti15 | 15kW 240V 3.0GPM 25-Year Warranty Electric Tankless Water Heater

• Lifetime guarantee - 25 Year Limited Warranty, best warranty in the category

Product Description

The opti15 electric tankless water heater can replace a tank heater for the whole home, act as a point of use, or supplement a hybrid as a booster to extend hot water availability. Refer to the sizing map in the images to learn more about the model that is best for you.

With its powerful 14.5kW heating system and one-of-a-kind ultrasonic design, this water heater is engineered for energy efficiency and space savings.

Expert, in-house, customer support stands behind the industry leading 25-year warranty for reliability you deserve in a product meant to last.

Set it and forget it to the exact temperature you desire for endless hot water with an accuracy of 1°.

Specifications 

• technical specs:

  electrical

  • 14.5 kW (15 kW rated)
  • 240V rated voltage
  • 60A max amp draw
  • 1 x 60 AMP DP breaker required
  • 2 x 6 AWG wire
  • 50/60 Hertz
  • 99% energy efficiency
  • 2 copper-sheathed heating elements

  plumbing

  • 3/4" NPT inlet/outlet connections
  • 0.25 GPM activation flow rate
  • 25-150 PSI dynamic operating pressure
  • 5 GPM max allowable flow
  • Welded copper heat exchanger

  technical

  • Digital temperature control
  • Temperature range: 80°F - 140°F
  • ±1°F temperature accuracy
  • LED display
  • Patented ultrasonic flow sensor

  physical

  • Dimensions: 12.5"H x 11.5"W x 3.5"D
  • Weight: 7.5 lbs
  • Indoor use / Wall mounted
  • 3/4" punchout diameter

  certifications + warranty

  • ETL Listed / Intertek certified
  • Conforms to UL 499 / CSA C22.2#64
  • ANSI/CAN 372:2022 compliant (lead-free)
  • 25-year residential warranty (see warranty page for details)
  • 5-year commercial warranty

install + care + warranty 

The opti15 includes a 25-year residential warranty and 5-year commercial warranty covering all components - heating elements, sensors, heat exchanger, and electronics.

Installation Resources:

• Opti 15 Manual
• Installation Video
• Mounting Instructions
• Link to warranty
  

Professional installation recommended. Requires 240V electrical service, 60A breaker, and basic plumbing connections. All electrical work must comply with local codes.

Need help? Contact our U.S.-based technical support team for installation guidance and troubleshooting.