220-Volt/240-Volt 18 Kw 3.7 GPM Smart Electric Tankless Water Heater

18 kW electric tankless water heater provides efficient, continuous on demand hot water. The Opti18 is the only water heater with patent pending ultrasonic flow sensing technology providing quiet, efficient and smart control. With advanced power modulation, built in diagnostics and wireless compatibility the Opti18 heats to within 1Deg of set temperatureplus or minus. Heat up to 3.7 gallons per minute gpm to 105DegF given an inlet water temperature of 72DegF. It supports a 2-bathroom home in warm climates or acts as a point of use in colder climates. Dry-fire protection prevents premature element failure for worry-free installation.

• • Lifetime guarantee 25-year limited warranty, best warranty in the category
• • Delivers continuous hot water for 1-shower and 1-sink used concurrently (based on a 1.5 GPM showerhead and 0.5 GPM sink faucet in southern US locations)
• • Smart tankless water heater, Wi-Fi plus app included and only water heater with patent pending ultrasonic flow sensing
• • Opti18's compact modern design is wall mounted and frees up closet space for extra valuable storage
• • Optimal products come with freeze protection, leak detection and vacation mode protection
• • Opti model products come with advanced diagnostics, no moving parts and easily replaced heating elements
• • Model is Wi-Fi compatible with Wi-Fi board upgrade (available soon), select the opti12 plus for Wi-Fi enabled model
• • Optimal app available on IOS and Android, requires upgraded Wi-Fi board
• • Plumbing specs are 3/4 in. npt connections, 0.25 gpm activation, 150 max psi
• • Electrical specs are 6 awg wire, 60 Amp dp breaker, 50/60 hertz, 12000-Watt 57 max Amp draw