Opti 12kW 208-Volt 2.5GPM 25-Year Warranty Electric Tankless Water Heater
- Point-of-use tankless water heater for endless hot water
- Lifetime guarantee with a best in class 25 year warranty
- Heater requires a 6 AWG wire, 60 AMP double pole breaker
- View More Details
Free & Easy Returns In Store or Online
Return this item within 90 days of purchase.
Ask about this product
Get an answer now with AI
Magic Apron Assistant is an AI virtual assistant. By proceeding, you consent to the recording and use of your information by The Home Depot (and authorized third parties). More information
Product Details
About This Product
The opti12 electric tankless water heater can replace a tank heater 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 12kW 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°.
Highlights
- Point-of-use tankless water heater for instant, endless hot water
- Save up to 50% on your water heating costs
- Save space and reclaim an entire closet worth of storage
- 25-year residential warranty covers all components including heat exchanger
- Patented US design is the only water heater with ultrasonic flow technology
- In-house, expert support is here to answer all your water heating questions
- Advanced, built in diagnostics make troubleshooting easy
- Dry-fire protection prevents elements from burning out
- Straightforward installation with standard 3/4 in. water connections and no venting needed
- Built in LED diagnostics let you monitor system status at a glance
- Looking for app control and remote monitoring? Check out our opti plus models
- Return Policy
Product Information
Specifications
Dimensions: H 12.5 in, W 11.5 in, D 3.5 in
Dimensions
Kilowatt | 12 |
|---|---|
Product Depth (in.) | 3.5 in |
Product Height (in.) | 12.5 in |
Product Width (in.) | 11.5 in |
Water Connection Size (in.) | 3/4 |
Details
Amperage (A) | 57 A |
|---|---|
Application Type | Residential |
Efficiency Level | Super High |
First Hour of Delivery (gallons/hr) | 152 |
Flow Rate @ 35°F Rise (gallons/min) | 2.54 gal (US)/min |
Flow Rate @ 45° Rise (gallons/min) | 1.97 gal (US)/min |
Indoor/Outdoor | Indoor |
Maximum Flow Rate (gallons per minute) | 2.5 |
Number of Showers | 1-2 |
Power Options | Hardwired |
Product Weight (lb.) | 8 lb |
Remote Access | No Remote Access |
Required Volt Connection | 240 volt |
Requires Hub? | No Hub Required |
Returnable | 90-Day |
Smart Home | Smart Home Enabled |
Smart Home Protocol | Wi-Fi |
Uniform Energy Factor | 0.99 |
Water Heater Features | Digital Display, Freeze Protection, Leak Detection, Overheat Protection, Vacation Mode, Wall Mounted |
Water Heater Type | Electric |
Wattage (watts) | 12000 W |
Warranty / Certifications
Certifications and Listings | ETL Listed |
|---|---|
Part Warranty | 25 Year |
Questions & Answers
Does all three elements turn on every time the hot water is turned on at the faucet
Hi Mark, To answer your question briefly: no. Our product adjusts power based on the flow rate and the set temperature, then distributes the necessary power among each element. For example, if the unit requires 10 kW to achieve the desired temperature, it will divide that 10 kW among all the elements. If you have any further questions or need additional assistance, please don't hesitate to contact our customer support team at 386-678-4625 or email us at Sales@itsoptimal.com.
Are these tankless heaters only meant to backup heaters to the bigger water heaters?
Hi Debra, This unit can serve as a booster to enhance your existing tank heater, providing approximately 60% more hot water. Alternatively, it can function as a standalone water heater for your entire home. If you choose to use it as a whole-home system, we recommend consulting our sizing guide to ensure you select the right unit for your needs.
Can this be used in a barn? 3 washer bay for horses and a close washer. The washer will most likely not be running when washing horses.
Hi Paul, this will depend on your flow rate in each wash bay. The Opti 15 can provide up to 3.0 GPM at 105°F with an incoming water temp of 72°F. For more details, please contact our sales team at 386-678-4625. Thank you.
Can this product work with two full bathrooms washer and dishwasher?
Hi Brandon. Sizing varies by state due to different incomming water temperatures. In most cases, the Opti 18 can handle 3 to 4 GPM, which is enough to run 2 showers and a small sink simultaneously. To confirm sizing, please contact our sales team at 386-678-4625 or visit our sizing guide at https://itsoptimal.com/pages/calculator. Thank you.
Can I use this electric water heater in Mexico?
Hi Montero, yes as long the home has 240v and at least a 150 amp services panel for the whole home. Please contact our support team if you have any more questions 386-678-4625.
Would this support 2 full baths, washer machin and a dishwasher in Rocky Mount NC Thank you!
Hi Mike, great question. If you're looking to run all of these appliances simultaneously, I would recommend the Opti 27kw, as it will provide 3.5 to 4.0 GPM in your area. If you are more likely to run one or two appliances simultaneously (sink & shower), then the Opti 18 will be sufficient. When sizing an electric tankless water heater, it is essential to understand the simultaneous usage in order to size a product correctly. Don't hesitate to contact our sales team if you have any further questions. 386-678-4625 option 1. Thank you.
The 27 KW you require 3 -40 amp breakers and it’s single phase. How are you splitting up the phases. Do you need to run a 3 wire cable . Please send a wiring diagram. I see the 2 terminal blocks.
The Opti 27Kw is a single-phase unit that requires 3 DP 40 amp breakers with three sets of 8/2 Romex to 8 AWG wire. You will need to run three separate circuits for each 40-amp breaker.
Will the tank work with well water?
All Optimal heaters are equipped with durable copper-sheathed heating elements. If you are using a well system and don’t have an inline filter, we recommend performing yearly maintenance to extend the lifespan of the heating element.
Viewing 1-8 of 15
Customer Reviews
4.8 out of 5
5
36
4
2
3
0
2
1
1
1
If the breaker tripped after 30 seconds, it may indicate a concern with the wiring or the breaker size. Generally, if the unit itself were the cause, the breaker would trip immediately.
Please let me know if you would like a member of our support team to contact you directly. We would be happy to assist you and work to resolve this as soon as possible.
Loading Recommendations
Compare Key Features
Product Snapshot | |||
|---|---|---|---|
Great for homeowners looking for on-demand hot water, making showers more enjoyable with continuous hot water. | Ideal for homeowners looking for on-demand hot water, making showers and faucet use easier and more efficient. | Ideal for homeowners looking for an energy-efficient water heater, the Tempra 15 Trend boasts a compact design and delivers endless hot water for 1-1.5 bathrooms. | Ideal for homeowners looking for an energy-efficient water heater , making hot water delivery easier and more efficient . This tankless water heater provides endless hot water on demand , saving energy and money .. |
Flow Rate | |||
2.5 GPM | 3.51 GPM | 2.81 GPM | 3.75 GPM |
Power Output | |||
12 kW | 18 kW | 14.4 kW | 19.2 kW |
Temperature Control | |||
Heats to within 1° of set temperature | Electronic temperature control adjustable in 1-degree increments from 80-140 degrees F | 68 to 140°F | 68 to 140°F |
Maximum Temperature | |||
140 F | 140 F | 140 F | 140 F |
Smart Connectivity | |||
Related Products
Opti 18kW 240-Volt 3.7GPM 25-Year Warranty Electric Tankless Water Heater
The opti18 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 18kW 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°.
Opti 27kW 240-Volt 4.5GPM 25-Year Warranty Electric Tankless Water Heater
The opti27 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 27kW 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°.
Performance 18 kW 3.51 GPM 240-Volt Self-Modulating Electric Tankless Water Heater
Get hot water for your space with this Performance Self-Modulating Tankless Electric Water Heater. This energy-efficient tankless water heater delivers an endless hot water supply and consistent temperature with a self-modulating technology that adjusts energy based on your hot water needs. With the electronic thermostatic temperature, you can easily read the incoming water temperature and control it in one-degree increments. Point-of-use installation and compact size makes this Performance tankless water heater a convenient choice.
Opti Plus 12kW 208-Volt 2.5GPM Wifi Enabled 25-Year Warranty Electric Tankless Water Heater
The opti12 plus wifi enabled electric tankless water heater can replace a tank heater for 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. Connect to optimal intelligence with the Optimal App. Track your usage, adjust your temperature, and get real-time notifications. With its powerful 12kW 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°.
