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Availability:
In Stock.
Arrives
Thursday, Oct 8
Size: S-11
Features
- Dedicated Circuit Requirements & InstallationThis Westinghouse tankless water heater requires a dedicated 60A double-pole breaker and 8 AWG wire at 240V for stable, safe operation. With 1/2" NPT connections and a compact wall-mountable design that takes zero floor space, this Westinghouse electric tankless water heater offers quick, hassle-free installationwhether new build or replacement, just as you'd expect from a genuine Westinghouse tankless water heater electric.
- 3-Second Instant Heating & On Demand Hot WaterThis 11kW tankless water heater delivers hot water in just 3 seconds with 98% thermal efficiency. The minimum start-up flow rate is 0.53 GPM. When inlet temperature is 62F and outlet is set to 105F, flow reaches 2.6 GPMideal for a single water point, perfect for a shower. This on demand hot water heater brings instant hot water to your daily routine. That's the reliable performance you expect from a Westinghouse electric tankless water heater 240V.
- Smart WiFi , Voice Control & Temperature MemoryCompatible with Alexa and Google Home, this Westinghouse tankless water heater lets you adjust temperature and monitor usage via simple voice commands or the mobile app from anywhere. The new temperature memory function automatically restores your last preset temperature after a power outageno repetitive setup required. This electric tankless water heater makes hot water management as effortless as controlling your smart lights, making it an essential component of any modern smart home, all backed by the trusted Westinghouse name.
- ETL Certified Safe & ReliableThis Westinghouse tankless water heater electric is ETL certified with 4-layer protection (leakage, overheat, dry-fire, over-voltage), IPX4 rating, and separated water-electricity pathway. Upgraded anti-fog technology resists moisture, allowing installation in bathrooms. This 11kW on demand hot water heater is built with safety you can trust from Westinghouse.
- Long-Lasting Durability & Scale Reduction The separated water-electricity pathway in this Westinghouse electric tankless water heater significantly reduces internal corrosion and scale buildup, extending the unit's service life. A removable inlet filter and rotor can be easily taken out by hand for cleaningwe recommend rinsing them every 6 months to remove trapped sediment and scale. This simple maintenance step restores optimal water flow and ensures your instant hot water heater consistently performs at its best, year after year, with the durability that Westinghouse products are famous for.
- Versatile Applications The Ideal Choice for Homes & MoreThis 11kW Westinghouse electric tankless water heater is purpose-built for residential use, perfectly suited for apartments, single-family homes, cabins, office restrooms, and more. Whether it's a hot shower in the bathroom, dishwashing in the kitchen, or handwashing in a commercial restroom, this Westinghouse tankless water heater electric delivers a continuous, steady supply of comfortable instant hot water on demand. Compact size, powerful output, and smart controls make this electric tankless water heater 240v the ultimate upgrade for any modern living spacereliable hot water, wherever you need it.
Description
APOLO 3.0-11kW APOLO 3.0-14kW APOLO-24kW 14kW-Copper Heating 18kW-Copper Heating 24kW-Copper Heating 27kW-Copper Heating
Brand: Westinghouse
Power Source: Hard Wiring Required
Product Dimensions: 9.56"W x 12.59"H
Special Feature: 3s Instant Heating & 98% thermal efficiency, ETL Certified, Easy Installation, Smart WiFi Voice Control with Alexa & Google Home, Temperature Memory Function See more
Color: Gray
Power Source: Hard Wiring Required
Special Features: 3s Instant Heating & 98% thermal efficiency, ETL Certified, Easy Installation, Smart WiFi Voice Control with Alexa & Google Home, Temperature Memory Function
Wattage: 11 KW
Voltage: 240 volts_of_alternating_current
Flow Rate: 2.56 gpm
Maximum Temperature: 140 °F
Heat Output: 11000 watts
Maximum Pressure: 120 psi
Mount Type: Wall
Item Dimensions W x H: 9.56"W x 12.59"H
Material Type: Sheet Metal
Item Highlight: Max 2.6GPM, 1 Point of Use, 86-140℉ Temp.Range, ETL Certified, Compact, Smart Wifi Compatible with Alexa & Google Home
Brand Name: Westinghouse
Model Number: WET011A0G
Number of Items: 1
Unit Count: 1 Count
Manufacturer: Westinghouse
UPC: 850074317357
Included Components: Assembly Kit x 1, Electric Tankless Water Heater x 1, Installation Guide x 1, User's Manual x 1
Manufacturer Part Number: ET011KA1G
Color: Gray
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Oct 8
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Size: M-14
Saves on power
Reviewed in the United States on September 18, 2026 by Amazon Customer
Size: L-24
I really wanted to install this water heater, but my electrician reviewed the power box and determined I did not have enough power to run this model. I had to return this heater and buy a smaller one. I shopped for this and felt it was perfect but did not realize the amps needed. I never even opened the box.
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Reviewed in the United States on August 7, 2026 by Suzanne Sarasin
Size: S-11
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Reviewed in the United States on September 11, 2026 by Amazon Customer
Size: M-14
This was installed in the basement underneath of my kitchen sink to use as a "booster" to my normal tanked electric hot water heater. This model appealed to me because I can set it on my phone and adjust the temperature on the fly. I did manage to DIY an install of this, but I am a handyman with a fair amount of tools and a little bit of experience with plumbing and electrical work and even I really was thinking I should have called a professional halfway thru. This is not a simple install. I would not advise just watching a youtube video. This unit is very compact and will fit a lot of places. It might even fit under your sink if you don't have anything down there, but I have a water purification system. It would be nice to have direct access to the unit without going down in the basement, but the app works well. Overall I am very happy with its performance. Previously the kitchen/laundry room were at the very end of my hot water loop. This meant that it would take over 90 seconds to start getting hot water. That's a lot of wasted water every time I want to just rinse out a cup. Now that I have this installed within 10 seconds I'm getting hot water. Not only that but it greatly improved the performance of my dishwasher. My dishwasher does not preheat the water on its own, it uses water from the hot water tap. This means, especially in efficiency modes, it's using cold water to wash the dishes since it rarely pulls water for more than a couple of minutes. With this hot water heater it's using hot water. I can also use the app to change the water temperature to a much higher setting when I'm washing dishes. Having wireless app control is really incredible. I put an inline filter in when I set mine up, but I still appreciate the removable filter that is easy to clean on this model. A lot of plumbers will tell you not to bother with tankless water heaters because they get gunked up, so being able to clean it easily is very important. This is a very high quality unit. Overall this water heater is remarkably affordable for all of the features it offers. There's other models out there for less but none of them offer the wifi voice control or the cleanable filter. This model isn't going to heat an entire house's water either. This is a good point of use hot water heater, but it's not a whole home replacement.
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Reviewed in the United States on August 1, 2026 by Amazon Reviewer
Size: M-14
Excellent Point-of-Use Tankless Water Heater We have a bathroom at the opposite end of the house from our main water heater. It takes a long time for hot water to reach the sink, and by the time it gets there it has already lost some heat. This unit was a great solution as an under-sink installation to boost both the shower and sink by heating the water much closer to where it's needed. This is not a trivial installation, though. In our case it required opening drywall to access the shower plumbing, and because this is a 14kW unit it also required a dedicated 240V, 60-amp circuit run with 6 AWG wire. The wiring alone cost $400. Depending on your home's layout, running a new circuit can be a significant project. I'd recommend talking with an electrician before purchasing to verify your electrical service has the capacity and to estimate the installation cost. The heater itself is compact, well built, and has some thoughtful features like the removable inlet filter for maintenance. The Wi-Fi functionality is a nice bonus, but the biggest advantage is having hot water where you need it instead of waiting for it to travel across the house. For $284.99 (price at time of order), I think it's a good value as long as it's sized appropriately for the application and you understand the installation requirements. Once installed it works amazing. Instant hot water is a game changer for a quick face or hand wash where we used to wait 30 seconds.
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Reviewed in the United States on August 8, 2026 by Amazon Customer
Size: M-14
This Westinghouse 14kW tankless water heater is a great choice for targeted point of use setups or smaller residential hot water demands. The physical footprint is surprisingly compact at under 13 inches tall, mounting flat against the wall and freeing up valuable floor space. Just make sure your electrical panel is prepped for it, as it requires a dedicated 60A double pole breaker wired with 6 AWG cable at 240V alongside standard 1/2 inch NPT plumbing connections. Performance wise, water heating is virtually instantaneous. It starts warming within seconds of opening a faucet and maintains consistent temperature without noticeable fluctuations. With a max output of around 3.4 GPM, it easily handles two fixtures simultaneously like a bathroom sink and a low flow shower head provided incoming ground water temps are moderate. The smart features and app integration add a lot of convenience. Adjusting temperature setpoints directly from a phone or smart home voice assistant is quick and responsive, and the built in memory restores your preferred settings automatically if power cuts out. With its solid ETL safety ratings and accessible inlet filter for quick sediment maintenance, it offers great value and reliable performance.
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Reviewed in the United States on August 29, 2026 by Chris Brundige
Size: S-11
I spent weeks comparing different models before this one caught my eye—and I'm glad I waited. It's ETL certified with 4-layer protection including leakage, overheat, dry-fire, and over-voltage protection. I installed it near my bathroom, and the IPX4 waterproof rating plus anti-fog technology gave me the confidence to mount it there. The separated water-electricity pathway definitely seems like it'll reduce internal corrosion over time. I've only had it running for about a week, so I can't speak to long-term durability yet, but the build quality is evident the moment you hold it. The removable inlet filter is a smart touch—the manual recommends rinsing it every 6 months, which looks super easy to do by hand. As an early adopter of this newly released model, I can confidently say this on demand water heater delivers on both safety and performance. Highly recommend this Westinghouse tankless water heater electric to anyone considering the switch.
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Reviewed in the United States on August 30, 2026 by javier vasconcelos
Size: M-14
I was definitely surprised by the size of this. I don't know how well it would work on a whole house however, I did do the research and it says it should accommodate a three bedroom home. It'll be advisable to make sure you get a plumber to install this. This is not a DIY afternoon kind of thing. But hooking the water supply up wasn't too bad. The quality of the machine is really nice and has good water flow. I didn't feel like I lost pressure over the entire house. Water temperature it gets hot and stays hot long enough to take a shower, maybe leave a little longer. And I do take fairly long showers.
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Reviewed in the United States on September 22, 2026 by ShabbieRoad