Lifetime warranty
18 kW electric tankless water heater provides efficient, continuous on demand hot water. Opti+ WiFi board and Opti+ App Included.
• Lifetime guarantee 25-year limited warranty, best warranty in the category
• Delivers continuous hot water for 2-showers 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 includes Wi-Fi
• Optimal app available on IOS and Android
• Plumbing specs are 3/4 in. npt connections, 0.25 gpm activation, 150 max psi
• Requires 2x DP 40 AMP breakers with #8 AWG wire and has a max draw of 75 amps
Lifetime warranty. 12+ kW electric tankless water heater provides efficient, continuous on demand hot water. The Opti12+ 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 (with Wi-Fi board upgrade) the Opti12 heats to within 1° of set temperature(plus or minus). Heat up to 2.5 gallons per minute (GPM) to 105°F given an inlet water temperature of 72°F.
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. The Opti12 comes with a 25-year residential warranty and a 5 year commercial warranty. Covers all components and ground shipping. For more information on installation, best practices and the warranty, please use the Additional Resources links.
Full Specs
| Amperage (A) | 75 A |
| Application Type | Residential |
| Certifications and Listings | ETL Listed |
| Electricity Phase | Single Phase |
| Finish Family | White |
| First Hour of Delivery (gallons/hr) | 211 |
| Flow Rate @ 35°F Rise (gallons/min) | 3.50 gal (US)/min |
| Flow Rate @ 45° Rise (gallons/min) | 2.72 gal (US)/min |
| Flow Rate @ 55° Rise (gallons/min) | 2.23 gal (US)/min |
| Flow Rate @ 65° Rise (gallons/min) | 1.88 gal (US)/min |
| Heat Exchanger Warranty | 25 Year |
| Indoor/Outdoor | Indoor |
| Labor Warranty | No Warranty |
| Maximum Flow Rate (gallons per minute) | 3.5 |
| Maximum Temperature (F) | 140 F |
| Minimum Activation Rate (gpm) | 0.25 |
| Minimum Temperature (F) | 72 F |
| Number of Elements | 2 |
| Pack Size | 1 |
| Part Warranty | 25 Year |
| Product Depth (in.) | 3.5 in |
| Product Height (in.) | 16.9 in |
| Product Weight (lb.) | 12 lb |
| Product Width (in.) | 11.4 in |
| Required Volt Connection | 240 volt |
| Uniform Energy Factor | 0.99 |
| Water Connection Location | Bottom |
| Water Connection Size (in.) | 3/4 |
| Water Heater Features | WiFi;Wall Mounted;Digital Display;Leak Detection;Freeze Protection;Vacation Mode |
| Water Heater Type | Electric |
| Wattage (watts) | 18000 W |
| Smart Home | Smart Home Enabled |
| Requires Hub? | No Hub Required |
| Smart Home Protocol | Wi-Fi |
| Works With | Proprietary App |
| Voice Control Requirements | No Voice Control |
| Power Options | Hardwired |
| Remote Access | Remote Access |
