Optimal 220/240 Volt 18 Kw 3.7-GPM Smart Electric Tankless Water Heater
Lifetime warranty. 18 kW electric tankless water heater provides efficient, continuous on demand hot water. The Opti18 is the only water heater with patented 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 1° of set temperature (plus or minus). Heat up to 3.7 gallons per minute (gpm) to 105°F given an inlet water temperature of 72°F. It supports a 2- 3 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 Opti18 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.
Highlights
- 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 compatible and only water heater with patented ultrasonic flow sensing
- The 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
Specifications
| General |
| Color/Finish Family | White | Use Location | Indoor |
| Type | Tankless | Display Type | Digital |
| Power Source | Electric | Installation Type | Wall mount |
| Grade | Commercial/Residential | | |
| Dimensions |
| Depth (Inches) | 3.5 | Water Connection Size | 3/4-in |
| Family Size | 4 | Weight (lbs.) | 12 |
| Height (Inches) | 16.9 | Width (Feet) | 11.4 |
| Features |
| Annual Fuel Utilization Efficiency % (Percentage) | 0 | Point of Use | No |
| Grid Capable | No | Scale Prevention | No |
| High Efficiency | Yes | Super High Efficiency | Yes |
| Leak Detection | Yes | Uniform Energy Factor | 0.99 |
| Maximum Gallons per Minute | 3.5 | Voltage (Volts) | 240 |
| Maximum Temperature (Fahrenheit) | 140 | Water Connection Location | Bottom |
| Minimum Temperature (Fahrenheit) | 72 | Water Heater Style | Short |
| Overheat Shut-Off | Yes | Wattage (Watts) | 18000 |
| Compatibility |
| App Compatibility | Yes | Works with Apple HomeKit | No |
| Bluetooth Compatibility | No | Works with iOS | Yes |
| Smart Compatible | Yes | Works with SmartThings | No |
| Wi-Fi Compatibility | Yes | Works with the Google Assistant | No |
| Works with Amazon Alexa | No | For Use with Mobile Homes | No |
| Works with Android | Yes | For Use with RVs | No |
| Warranty |
| Warranty | 25-year limited | | |
| Certifications |
| CA Residents: Prop 65 Warning(s) | No | Safety Listing | ETL safety listing |
| ENERGY STAR Certified | No | AHRI Certified | No |
| Miscellaneous |
| UNSPSC | 40101800 | | |
