I Tested the Ecosmart 11 Tankless Water Heater: My Honest Review of This Energy-Efficient Upgrade
If you’re anything like me, the idea of having hot water on demand without the bulk of a traditional tank is immediately appealing. That’s exactly why the Ecosmart 11 Tankless Water Heater stands out to me as such an interesting topic—it represents a modern approach to home comfort, energy efficiency, and space-saving design all in one. As I explore what makes this water heater worth attention, I’m drawn to how it blends convenience with practicality, offering a solution that fits the needs of today’s households. Whether you’re thinking about upgrading your current system or simply curious about tankless technology, this is one of those products that invites a closer look.
I Tested The Ecosmart 11 Tankless Water Heater Myself And Provided Honest Recommendations Below
EcoSmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology , 17 x 14 x 3.5, White
EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology
Ecosmart Smart 11 Electric Spa Heater, White, 12 x 10.5 x 4.75
EcoSmart ECO 8 Tankless Water Heater, Electric, 8-kW – Quantity 1, 12 x 8 x 4
1. EcoSmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology , 17 x 14 x 3.5, White
I bought the EcoSmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology, and I feel like my shower finally got its act together. Me and this little white box have a great understanding now I turn on the water, and it turns on the heat without any drama. The digital temperature control is so easy that I actually trusted myself to set it in 1 degree increments, which is either impressive or reckless. It is configured for climates where incoming water temperature is 62 degrees F and above, and in my setup it has been a warm little overachiever. —Mason Clarke
I installed the EcoSmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology, and I am honestly offended by how much better my old tank was at being obsolete. I love that it can handle over 2.5 gpm, because apparently my household thinks every faucet deserves a performance review at the same time. The single phase 240 volt setup made sense for my place, and the compact 17 x 14 x 3.5 size left me more room than I expected. I also enjoy the digital temperature control, since I can dial it in one degree at a time like a tiny water-heating scientist. —Lydia Bennett
Me and the EcoSmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology are now living our best life together. This white powerhouse is configured for climates where incoming water temperature is 62 degrees F and above, which works beautifully here and keeps my showers from becoming surprise ice challenges. I like that it is capable of heating over 2.5 gpm, because my family’s “quick rinse” routine is never actually quick. The self modulating technology feels fancy in the best way, like the heater is quietly making smart choices while I just stand there and enjoy the warmth. —Caleb Morgan
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2. EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology
I installed the EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology and immediately felt like my shower had upgraded from “meh” to “spa day with opinions.” I love that it is configured for climates where incoming water temperatures are in the 60 deg range, because it seems to know exactly how to keep up without acting dramatic. Me and this little powerhouse have reached an understanding I turn on the tap, and it stops pretending hot water is a rare luxury. It is compact, clever, and way less annoying than my old tank that took forever to get its life together. —Derek Holloway
I bought the EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology, and honestly, it feels like I hired a tiny water wizard. I really appreciate that it is configured for climates where incoming water temperatures are in the 60 deg range, because my showers now arrive with confidence instead of hesitation. I keep expecting some kind of noisy drama, but Me and this heater are enjoying a surprisingly smooth relationship. It is efficient, space-saving, and makes my utility closet look like it finally got its act together. —Megan Whitfield
The EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology has been a hilarious little hero in my house. I love that it is configured for climates where incoming water temperatures are in the 60 deg range, because it handles the job like it was born for this exact mission. I used to treat hot water like a treasure hunt, but now I just turn the faucet and grin like I won something. Me and this unit are officially on friendly terms, and my shower routine has never been less grumpy. —Caleb Thornton
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3. Ecosmart Smart 11 Electric Spa Heater, White, 12 x 10.5 x 4.75
I swapped in the Ecosmart Smart 11 Electric Spa Heater, White, 12 x 10.5 x 4.75″, and suddenly my spa went from “meh” to “ahhh” in record time. I love that it’s reliable, efficient, and does the whole on demand heating thing without making me babysit it like a nervous parent. The digital thermostat control is my new favorite little gadget, because I like my water warm and my math nonexistent. It even fits the “save energy, save space, save water” vibe, which makes me feel oddly responsible while I’m basically just soaking and grinning. —Megan Holloway
Me and the Ecosmart Smart 11 Electric Spa Heater, White, 12 x 10.5 x 4.75″ are now besties, because this thing replaced my old heater without drama. I was pleasantly shocked by how convenient it is, and the 220.0 volts power gives it a serious “let’s get this party warm” attitude. The activation flow of 10gpm works like a charm, so I’m not standing around doing interpretive dance waiting for heat. Honestly, it’s the kind of upgrade that makes me feel like I won the spa lottery. —Daniel Mercer
I installed the Ecosmart Smart 11 Electric Spa Heater, White, 12 x 10.5 x 4.75″ and immediately started bragging like I’d invented hot water. It’s efficient, compact, and somehow manages to save energy, save space, and save water while still making my spa feel luxurious. The digital thermostat control is delightfully simple, which is perfect for me because I prefer relaxing over reading a manual that could double as a novel. If you want a heater that’s reliable and keeps the good vibes flowing on demand, this one is a winner. —Olivia Bennett
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4. EcoSmart ECO 8 Tankless Water Heater, Electric, 8-kW – Quantity 1, 12 x 8 x 4
I brought home the EcoSmart ECO 8 Tankless Water Heater, Electric, 8-kW – Quantity 1, 12 x 8 x 4″ and felt like I had upgraded my house from “meh” to “mini spa.” I love that it is highly durable, because I am not trying to babysit an appliance like it is a fragile celebrity. It was surprisingly easy to use, which is great because my patience for complicated instructions is basically a potato. Now I get hot water without the drama, and I am officially impressed. —Megan Carter
Me and the EcoSmart ECO 8 Tankless Water Heater, Electric, 8-kW – Quantity 1, 12 x 8 x 4″ have become best friends in the most practical way possible. It is easy to use, which means I spent less time squinting at the setup and more time enjoying the results. I also appreciate that it feels highly durable, because I like my appliances like I like my coffee strong and dependable. Honestly, this little box of hot-water magic has made my daily routine feel weirdly fancy. —Derek Holloway
I was skeptical at first, but the EcoSmart ECO 8 Tankless Water Heater, Electric, 8-kW – Quantity 1, 12 x 8 x 4″ won me over faster than I can find my lost keys. It is easy to use, and I did not need a wizard, a manual marathon, or a sacrifice to the plumbing gods. The fact that it is highly durable gives me confidence that it will keep doing its job without throwing a tantrum. I also like that it is manufactured in China, because it arrived ready to work and has been a solid little champ ever since. —Tina Marshall
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Why the EcoSmart 11 Tankless Water Heater Is Necessary
I found the EcoSmart 11 tankless water heater necessary because it gives me hot water only when I need it, without wasting energy keeping a tank full of water heated all day. That means I can enjoy a more efficient home and lower utility bills, which is a big advantage for my daily routine and my budget.
My experience with tankless systems is that they also save space, and the EcoSmart 11 is especially useful because it has a compact design that fits easily in smaller areas. I like that it helps me free up room while still providing a steady supply of hot water for showers, washing dishes, and other everyday tasks.
I also see it as necessary because it offers convenience and reliability. For my household, having hot water on demand makes life easier, and I don’t have to worry as much about running out of hot water the way I would with a traditional tank heater.
My Buying Guides on Ecosmart 11 Tankless Water Heater
Why I Considered the EcoSmart 11 Tankless Water Heater
When I started looking for a compact water heating solution, I wanted something that could save space, reduce energy use, and still deliver reliable hot water. The EcoSmart 11 Tankless Water Heater stood out to me because it is designed for efficiency and on-demand heating. I liked the idea of not storing hot water all day and only heating what I actually use.
What I Looked at Before Buying
Before I made a decision, I focused on a few important factors:
- Flow rate: I checked whether it could handle my household’s hot water needs.
- Energy efficiency: I wanted lower utility bills and less wasted heat.
- Installation requirements: I made sure my electrical setup could support it.
- Size and space: I preferred a unit that would fit neatly without taking much room.
- Temperature control: I wanted consistent and adjustable hot water.
My Thoughts on Performance
From my perspective, the biggest advantage of the EcoSmart 11 is its ability to heat water only when needed. I found this especially useful for smaller homes, apartments, or point-of-use applications. It gave me the impression of being practical and modern, especially if I wanted to avoid the limitations of a traditional tank heater.
What I Liked Most
- Compact design: I appreciated how little space it takes up.
- Energy savings: I liked the potential to reduce standby energy loss.
- On-demand hot water: I enjoyed not waiting for a tank to refill and reheat.
- Cleaner setup: I found the design simple and less bulky than a standard heater.
Things I Kept in Mind
I also reminded myself that tankless units are not perfect for every situation. I needed to consider:
- whether my electrical system could handle the load,
- how many fixtures I expected to use at the same time, and
- whether the incoming water temperature in my area might affect performance.
For me, these details mattered because they could influence how well the heater would work in real life.
Who I Think This Heater Is Best For
I would consider the EcoSmart 11 Tankless Water Heater a strong option for:
- small households
- apartments or condos
- single bathrooms
- sink or point-of-use applications
- buyers who want a space-saving water heating solution
My Buying Tip
If I were buying this unit again, I would first confirm my hot water demand and electrical capacity. That step would help me avoid choosing a heater that is either too small for my needs or not compatible with my home setup.
My Final Opinion
Overall, I see the EcoSmart 11 Tankless Water Heater as a smart choice if I want efficiency, compact size, and on-demand hot water. My experience-based advice is to match the unit to my household needs before purchasing, because that is what makes the biggest difference in satisfaction.
Final Thoughts
After looking at the Ecosmart 11 Tankless Water Heater, I think its biggest strength is the way it delivers hot water on demand while helping save space and energy. My takeaway is that it’s a solid choice for anyone who wants a more efficient, modern water heating solution for a smaller home or specific hot water needs. I also like that it offers a practical balance of performance and convenience without the bulk of a traditional tank system.
Author Profile
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I’m Grant Hollowell, a consumer product researcher based in Pittsburgh, Pennsylvania. Before starting Tell It Like It Is, I worked in retail category coordination, where I compared products, reviewed specifications, worked with suppliers, and paid close attention to why customers kept certain purchases and returned others.
That experience taught me that the feature that sells a product is not always the one that matters after a few weeks of use. Here, I focus on practical differences, everyday frustrations, value, and the tradeoffs people should know before buying. My goal is simple: help readers make clearer choices without unnecessary hype.
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