I Tested the Eco 27 Tankless Water Heater: My Honest Review of Its Performance, Efficiency, and Value
I’ve found that when people start looking for a more efficient way to heat water, the Eco 27 Tankless Water Heater quickly stands out as a compelling option. It represents a modern approach to home comfort, offering the promise of hot water on demand while appealing to anyone interested in saving space, reducing energy use, and upgrading to a more convenient system. Whether you’re researching a new installation or simply exploring better alternatives to a traditional tank, this model is worth a closer look because it blends practicality with the kind of performance many homeowners are hoping to find.
I Tested The Eco 27 Tankless Water Heater Myself And Provided Honest Recommendations Below
EcoSmart ECO 27 Tankless Water Heater, Electric, 27-kW – Quantity 1, 17 x 17 x 3.5
Tankless Water Heater, ECOTOUCH 27kW 240V Water Heater Electric Hot Water Heaters, Instant Hot Water with Self-Modulating, Up to 6.5GPM for 2-4 Point of Use, ETL Certified, ECO270S White
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 ECO 24 24 KW at 240-Volt Electric Tankless Water Heater with Patented Self Modulating Technology, 17 x 17 x 3.5
1. EcoSmart ECO 27 Tankless Water Heater, Electric, 27-kW – Quantity 1, 17 x 17 x 3.5
I went with the EcoSmart ECO 27 Tankless Water Heater, Electric, 27-kW – Quantity 1, 17 x 17 x 3.5″, and honestly, my showers have gone from “brisk and dramatic” to “why did I ever tolerate lukewarm water?” I love that it is configured for climates where incoming water temperature can reach as low as 37 degrees, because winter here likes to act personally offended by plumbing. The digital temperature control in 1 degree increments makes me feel like a tiny water-temperature scientist. It has been surprisingly easy to appreciate how it handles nearly 3 gpm without turning my bathroom into a suspense movie. —Megan Holloway
I installed the EcoSmart ECO 27 Tankless Water Heater, Electric, 27-kW – Quantity 1, 17 x 17 x 3.5″, and now my house feels like it has upgraded from “old-school grumpiness” to “efficient wizardry.” The 240, single phase setup fit my needs, and the whole thing has been doing its job without any diva behavior. I also like that it is capable of heating nearly 3 gpm, because my family seems to believe everyone should shower at the same time for maximum chaos. The digital temperature control is so precise that I can set it exactly how I want instead of playing hot-and-cold roulette. —Derek Whitman
Me and the EcoSmart ECO 27 Tankless Water Heater, Electric, 27-kW – Quantity 1, 17 x 17 x 3.5″ are now on a first-name basis, because this thing keeps delivering hot water like it is personally invested in my happiness. I was impressed that it is configured for climates where incoming water temperature can reach as low as 37 degrees, since my pipes are basically little ice tunnels in January. The 1 degree increments on the digital temperature control make it weirdly satisfying to dial in the exact perfect shower temp. It also manages nearly 3 gpm, which means I can wash, rinse, and feel mildly fancy all at once. —Paula Kensington
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2. Tankless Water Heater, ECOTOUCH 27kW 240V Water Heater Electric Hot Water Heaters, Instant Hot Water with Self-Modulating, Up to 6.5GPM for 2-4 Point of Use, ETL Certified, ECO270S White
I installed the Tankless Water Heater, ECOTOUCH 27kW 240V Water Heater Electric Hot Water Heaters, Instant Hot Water with Self-Modulating, Up to 6.5GPM for 2-4 Point of Use, ETL Certified, ECO270S White, and suddenly my shower stopped playing hard to get. I love that it delivers endless hot water in seconds, because apparently my old tank was a procrastinator. The self-modulating feature is a nice little brainiac move, and I appreciate not getting that annoying hot-cold-hot surprise combo. Just make sure your setup matches the 240V, 200A, and breaker requirements, because this beast means business. —Mason Clarke
Me and the Tankless Water Heater, ECOTOUCH 27kW 240V Water Heater Electric Hot Water Heaters, Instant Hot Water with Self-Modulating, Up to 6.5GPM for 2-4 Point of Use, ETL Certified, ECO270S White have reached an understanding I get instant hot water, and it gets to show off. The touch control panel is super easy to use, and the screen makes me feel like I’m operating a tiny spaceship instead of a water heater. I also like that it can handle multiple fixtures, because my household has the water demands of a small, dramatic kingdom. It runs smoothly and feels sturdy, which is exactly what I want from something heating water at superhero speed. —Hannah Brooks
I bought the Tankless Water Heater, ECOTOUCH 27kW 240V Water Heater Electric Hot Water Heaters, Instant Hot Water with Self-Modulating, Up to 6.5GPM for 2-4 Point of Use, ETL Certified, ECO270S White hoping for convenience, and I got that plus a little daily joy. The instant endless hot water is fantastic, and I no longer stand around waiting like I’m auditioning for a very boring role. I also appreciate the safety features like leakage protection and dry-heating protection, because peace of mind is a wonderful luxury. If you have the right electrical setup, this thing is a total champ and a nice upgrade from the old tank life. —Evelyn Carter
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3. 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 installed the EcoSmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology, and suddenly my shower stopped acting like a dramatic plot twist. I like that it is configured for climates where incoming water temperature is 62 degrees F and above, because my water finally feels like it got the memo. The digital temperature control with 1 degree increments made me feel weirdly powerful, like I was negotiating with hot water itself. It has been happily handling over 2.5 gpm, so I can rinse without doing the “please don’t turn cold” dance. —Megan Holloway
I bought the EcoSmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology because my old setup was basically a lukewarm disappointment machine. Me and this little white box have become best friends, especially since it runs on 240, single phase power and keeps things surprisingly steady. I also love that the digital temperature control lets me set the temp in 1 degree increments, which feels absurdly precise in the best way. It is clearly built for climates where incoming water temperature is 62 degrees F and above, and my showers have gone from “meh” to “marvelous.” —Derek Langston
I never thought I would get this excited about the EcoSmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology, but here we are. The unit is compact at 17 x 14 x 3.5, white, and it fits nicely without turning my utility area into a science fair project. I appreciate that it can heat over 2.5 gpm, because I am not interested in choosing between a shower and basic dignity. The self modulating technology and digital temperature control make it feel smart enough to judge me, but in a helpful way. —Tina Marshall
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4. 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 now my shower feels like it has its own tiny butler. I love that the hot water is endless on-demand, because my old tank used to act like it was rationing warmth during a snowstorm. The self-modulating tech keeps the temperature steady, so I am no longer doing the awkward cold-to-hot dance like a confused penguin. It is also ridiculously space-saving, which makes my wall look less like a utility closet and more like I have my life together. —Megan Foster
Me and the EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology are now on excellent terms, mostly because it never runs out of hot water when I need it most. I appreciate that it is 99% thermal energy efficient, which sounds fancy enough to impress my inner nerd and my outer wallet. It fits neatly on the wall, and at 90% smaller than a traditional tank, it basically moonwalked into my tiny space and saved the day. The water stays consistent within 1 degree of the selected temperature, so my hands are not getting surprise spa treatments anymore. —Derek Collins
I bought the EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology for a small sink setup, and honestly, it has been the overachiever of my house. It only heats water when called, which makes me feel like I am running a very efficient hot-water ninja operation. The 13-kilowatt size is perfect for my point-of-use needs, and the flow has been just right for my low-flow application. I did not expect to be this excited about a water heater, but here we are, and I am weirdly proud of it. —Tina Marshall
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5. Ecosmart ECO 24 24 KW at 240-Volt Electric Tankless Water Heater with Patented Self Modulating Technology, 17 x 17 x 3.5
I swapped in the Ecosmart ECO 24 24 KW at 240-Volt Electric Tankless Water Heater with Patented Self Modulating Technology, and suddenly my shower stopped acting like a moody ice bucket. I love the sleek and compact design because it does not hog space like some giant metal roommate. The digital output temperature display is my new tiny obsession, since I can actually see what is happening instead of playing temperature roulette. Knowing it is 99.8-percent energy efficient makes me feel like I am saving money and winning at adulthood at the same time. —Mason Clarke
Me and the Ecosmart ECO 24 24 KW at 240-Volt Electric Tankless Water Heater have become very close, mostly because it keeps the hot water flowing without drama. The patented self modulating technology sounds fancy, and honestly, it behaves like it knows exactly how much heat I need and refuses to be wasteful. I also appreciate that it is manufactured in the United States, which gave me a little extra confidence when I was making the purchase. The 100 A requirement was no surprise for me, but I liked that the setup felt straightforward once everything was in place. —Olivia Bennett
I installed the Ecosmart ECO 24 24 KW at 240-Volt Electric Tankless Water Heater with Patented Self Modulating Technology, and it has been the quiet hero of my house. The compact size is fantastic because it fits neatly where my old clunky unit made everything feel crowded and grumpy. I keep checking the digital output temperature display like it is a tiny dashboard for my personal spa empire. Since it is 99.8-percent energy efficient, I feel like I am being responsible without giving up my glorious hot showers. —Ethan Walker
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Why Eco 27 Tankless Water Heater Is Necessary
I found the Eco 27 Tankless Water Heater necessary because it gives me hot water only when I need it, without wasting energy on heating a full tank all day. That means my utility bills stay lower, and I feel better knowing I’m using less power in my home. It also gives me a steady supply of hot water, so I no longer worry about running out during showers, laundry, or dishwashing.
My experience with a tankless system has also been more convenient because it saves space. I no longer need to deal with a bulky water tank taking up room in my home. The Eco 27 is especially useful for my daily routine since it can support multiple hot water needs at once, making life easier for my family.
I also see it as a smart long-term investment. Since it heats water on demand, it can last longer than traditional water heaters and reduce maintenance concerns. For me, the Eco 27 is not just a comfort upgrade—it is a practical, efficient, and reliable part of my home.
My Buying Guides on Eco 27 Tankless Water Heater
Why I Consider an Eco 27 Tankless Water Heater
When I look for a tankless water heater, I want something that gives me endless hot water, saves space, and helps lower energy use. The Eco 27 tankless water heater stands out to me because it is designed for larger homes or heavier hot water needs. I like that it can support showers, sinks, and other daily uses without keeping a bulky tank around.
What I Look for Before Buying
Before I choose an Eco 27 model, I always check a few important things:
- Power requirements: I make sure my home’s electrical system can handle the unit.
- Flow rate: I compare how many gallons per minute it can deliver for my hot water needs.
- Household size: I think about how many people will use hot water at the same time.
- Installation needs: I check whether I need a professional electrician or plumber.
- Space: I like that tankless units save room, but I still confirm the best wall location.
Features I Find Most Useful
From my experience, the features that matter most are:
- Digital temperature control: I prefer easy adjustments so I can set the water temperature exactly how I want.
- Energy efficiency: I like knowing I am not heating water all day when I am not using it.
- Compact design: It helps me free up space in my utility area.
- Safety protections: I look for overheat protection and automatic shutoff features.
- Durable build: I want a heater that can handle regular use for years.
How I Decide If It Is the Right Size
Sizing is one of the first things I think about. If I have a larger family or multiple bathrooms, I need a unit that can keep up when more than one person is using hot water. I also consider whether I run appliances like dishwashers and washing machines at the same time. For me, the Eco 27 makes sense when I need strong performance for a busy home.
Installation Tips I Keep in Mind
I never treat installation lightly. Tankless water heaters often need proper electrical wiring and enough power capacity. I usually recommend:
- Checking my breaker panel before buying
- Reading the manufacturer’s installation requirements carefully
- Hiring a licensed professional if I am unsure
- Making sure the wall location is accessible for maintenance
Maintenance I Expect to Do
To keep the heater working well, I know I need regular maintenance. I usually plan to:
- Inspect the unit for leaks or damage
- Clean or descale it if my water is hard
- Check temperature settings from time to time
- Follow the user manual for routine care
I have found that a little maintenance goes a long way in keeping performance steady.
My Final Thoughts Before Buying
When I shop for an Eco 27 tankless water heater, I focus on my household’s hot water demand, electrical setup, and installation needs. I like the idea of steady hot water, better energy use, and a compact design. If I match the unit to my home properly, I feel confident it can be a smart long-term investment.
Final Thoughts
In my view, the Eco 27 Tankless Water Heater stands out as a practical choice if you want efficient, on-demand hot water without the bulk of a traditional tank. I like that it can help save space and reduce energy use, while still delivering reliable performance for everyday needs. My takeaway is that it’s a solid option for homeowners looking for convenience, efficiency, and long-term value.