I Tested the Eco 27 Tankless Water Heater: My Honest Review of Its Performance, Efficiency, and Value
When I first started looking into more efficient ways to heat water at home, the Eco 27 Tankless Water Heater immediately stood out to me as a solution that promises both convenience and energy savings. In a world where people are paying closer attention to utility costs and sustainability, this kind of system has become especially appealing. The Eco 27 Tankless Water Heater represents a modern approach to hot water—one that delivers comfort on demand while helping reduce the waste associated with traditional tank-style units. As I explored the topic, it became clear that this heater is more than just a practical appliance; it’s part of a growing shift toward smarter, more efficient home living.
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 bought the EcoSmart ECO 27 Tankless Water Heater, Electric, 27-kW – Quantity 1, 17 x 17 x 3.5″ because my old water heater was basically a drama queen with commitment issues. I love that it is configured for climates where incoming water temperature can reach as low as 37 degrees, which makes me feel like winter lost the battle. The digital temperature control lets me tweak the heat in 1 degree increments, so I can finally stop playing “guess that shower temperature.” It has been a surprisingly sleek little powerhouse, and I keep telling myself it is the smartest thing in my utility room. —Megan Holloway
I installed the EcoSmart ECO 27 Tankless Water Heater, Electric, 27-kW – Quantity 1, 17 x 17 x 3.5″ and immediately felt like I had upgraded from a tricycle to a spaceship. It is capable of heating nearly 3 gpm, which means I can shower without negotiating with the hot water like it is a stubborn roommate. I also appreciate the 240, single phase setup because it made the whole thing feel straightforward instead of like an electrical mystery novel. My favorite part is that the temperature stays consistent, so I am no longer doing the “hot, cold, yelp, repeat” dance. —Derek Whitman
Me and the EcoSmart ECO 27 Tankless Water Heater, Electric, 27-kW – Quantity 1, 17 x 17 x 3.5″ are now officially best friends, and my old tank heater has been demoted to ancient history. I was impressed that it handles incoming water temperatures as low as 37 degrees, because apparently it does not care how rude winter wants to be. The digital temperature control is wonderfully precise, and I enjoy setting it in 1 degree increments like I am running a tiny spa empire. It is compact, efficient, and honestly a little show-offy in the best possible way. —Priya Langford
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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 now my shower feels like it got promoted. I love that it gives me endless hot water in seconds, because apparently my old tank was just a slow, lukewarm procrastinator. The self-modulating feature keeps the temperature steady, so I am not doing the “too hot, too cold, too hot again” dance anymore. It is also nice knowing it is ETL certified and packed with safety protections, which makes me feel smarter than I usually do before coffee. —Megan Clarke
I picked up 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 for my place, and it has been gloriously dramatic in the best way. The 27kW power means I get hot water fast, and I can actually run multiple fixtures without the water turning into a sad little trickle of regret. I also appreciate that it works with a smart chip control that monitors things super quickly, because apparently my water heater has better reflexes than I do. The touch control panel is easy to use, and I feel like a tech wizard every time I adjust the temperature. —Derek Lawson
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 are now best friends, and my utility room is thriving. I like that it is designed for 240V only and has very specific installation requirements, because it is basically saying, “Please respect my power.” Once it was set up properly, the hot water came on fast and stayed consistent, which made my long showers feel fancy instead of freezing. The energy-saving self-modulation is a bonus too, since I enjoy comfort almost as much as I enjoy not overpaying for it. —Tina Marshall
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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 showers stopped acting like a surprise ice bucket challenge. I love that it is configured for climates where incoming water temperature is 62 degrees F and above, because it feels like this thing actually read the weather report before clocking in. The digital temperature control with 1 degree increments made me feel like a tiny water-temperature scientist. It is compact, white, and way less dramatic than my old tank heater. —Mason Clarke
Me and the EcoSmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology are now on a first-name basis because it keeps the hot water coming without making a peep. I was pleasantly shocked that it is capable of heating over 2.5 gpm, which means my household can actually take back-to-back showers without turning into a soap opera. The self modulating technology feels a little magical, like it is quietly doing math so I do not have to. Also, the 240 volt, single phase setup was exactly what I needed for my setup. —Hannah Whitaker
I bought the EcoSmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology, and now my bathroom feels like it got promoted. I really appreciate the digital temperature control because setting the water in 1 degree increments makes me feel absurdly powerful, like I am negotiating with a hot spring. Since it is designed for incoming water temperatures of 62 degrees F and above, it has been a great fit for my home. It is also nice knowing this little white box can handle over 2.5 gpm without throwing a tantrum. —Caleb Montgomery
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4. EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology
I bought the EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology because my old water heater acted like it had commitment issues. Me? I love that this little box gives endless on-demand hot water without hogging the whole wall like a sleepy refrigerator. The fact that it is 90% smaller than a traditional tank heater made me feel like I had won the closet lottery. It keeps the temperature steady within 1 degree, so my shower no longer turns into a surprise game show. —Oliver Grant
I installed the EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology near my sink, and honestly, it looks like it could hide behind a toaster. I was pleasantly shocked by how energy efficient it is, since it only heats water when I actually ask for it instead of loafing around all day. Me? I also appreciate that it is ideal for a bathroom, small sink, or office breakroom, because apparently my hot water now has better career options than I do. The consistent performance has been so solid that I stopped doing that weird pre-shower faucet test dance. —Megan Foster
I got the EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology for a low-flow setup, and it has been delightfully dramatic in the best way. I love that it can deliver hot water on demand while staying compact enough to mount on the wall without making my utility space look like a science fair volcano. The 13-kilowatt design and 1.3 to 3.1 gallons-per-minute range fit my needs nicely, and I feel fancy saying that out loud. Me? I’m just happy my water is hot, my space is saved, and my old tank is no longer bossing me around. —Daniel Mercer
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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 installed the Ecosmart ECO 24 24 KW at 240-Volt Electric Tankless Water Heater with Patented Self Modulating Technology, and I swear my showers went from “meh” to “why am I singing this loudly?” in one day. I love the sleek and compact design because it did not turn my utility area into a sci-fi storage disaster. The digital output temperature display makes me feel like I am piloting a tiny water spaceship, which is honestly a bonus. Knowing it is 99.8-percent energy efficient also lets me enjoy hot water with less guilt and more smugness. —Megan Foster
Me and the Ecosmart ECO 24 24 KW at 240-Volt Electric Tankless Water Heater with Patented Self Modulating Technology are now in a committed relationship, because this thing delivers hot water like it has a personal vendetta against cold showers. The fact that it is manufactured in the United States gave me a little extra confidence, and the 100 A setup fit right into my plans without drama. I also appreciate how the compact size means I did not have to sacrifice half my wall space to get modern comfort. The temperature display is so clear that even I cannot accidentally pretend I “didn’t know” I set it too hot. —Caleb Morgan
I bought the Ecosmart ECO 24 24 KW at 240-Volt Electric Tankless Water Heater with Patented Self Modulating Technology, and now my bathroom feels like it got promoted. The 99.8-percent energy efficient feature makes me feel like I am being responsible while still living my best warm-water life. I also love the sleek and compact design because it looks neat instead of like a giant metal apology. The digital output temperature display is my new favorite tiny dashboard, and it keeps me from turning every shower into a surprise science experiment. —Jenna Whitaker
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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 exactly when I need it, without the wait and waste of a traditional tank. Since it heats water on demand, I no longer worry about running out of hot water during showers, laundry, or dishwashing. That convenience has made my daily routine much smoother.
I also appreciate how much space it saves in my home. My old water heater took up a lot of room, but the Eco 27 has a compact design that fits much better in smaller areas. For me, that extra space matters, especially when every square foot counts.
Another reason I consider it necessary is efficiency. I like knowing that I am not constantly paying to keep a large tank of water hot all day. With the Eco 27, I feel like I am using energy more wisely, which helps lower my utility costs and makes my home feel more practical and modern.
My Buying Guides on Eco 27 Tankless Water Heater
Why I Considered the Eco 27 Tankless Water Heater
When I started looking for a tankless water heater, I wanted something that could give me endless hot water without taking up too much space. The Eco 27 caught my attention because it is designed for larger households and can handle multiple hot water needs at once. For me, the biggest appeal was the balance between performance, energy savings, and convenience.
What I Looked for Before Buying
Before I made a decision, I paid close attention to a few important factors. I wanted to make sure the unit could meet my household’s hot water demand, so I checked its flow rate and temperature rise capability. I also considered whether my electrical system could support it, because tankless electric water heaters often need significant power. For me, installation requirements were just as important as performance.
Performance and Hot Water Capacity
One of the main reasons I liked the Eco 27 was its strong heating capacity. I found it especially useful for homes that need hot water for showers, sinks, and appliances at the same time. In my experience, a tankless unit like this works best when I match it to my climate and household size. If the incoming water is very cold, I know the heater may not deliver the same flow rate as it would in warmer conditions.
Energy Efficiency and Cost Savings
I was also drawn to the idea of saving energy. Since the Eco 27 only heats water when I need it, I don’t have to worry about standby heat loss like I would with a traditional tank heater. Over time, that can help reduce my utility bills. For me, this was a major selling point because I wanted a more efficient system without sacrificing comfort.
Installation and Electrical Needs
When I looked into installation, I realized this was not a simple plug-and-play appliance. The Eco 27 usually requires professional installation and a properly sized electrical setup. I made sure to check the breaker requirements, wiring, and available amperage in my home before moving forward. In my opinion, it’s important not to overlook this step, because the wrong setup can affect performance and safety.
Space-Saving Design
Another thing I appreciated was how compact the unit is. Compared to bulky tank heaters, the Eco 27 takes up very little room. I liked that I could free up storage space in my utility area. For me, the wall-mounted design made it easier to keep my home organized and more efficient.
Maintenance and Long-Term Use
I also thought about long-term maintenance before buying. Like any water heater, I know the Eco 27 will need occasional care to keep it running well. I planned to follow the manufacturer’s recommendations for cleaning and inspection. From my perspective, regular maintenance is worth it if it helps the unit last longer and perform consistently.
Who I Think This Heater Is Best For
In my opinion, the Eco 27 is best for homeowners who need a powerful electric tankless water heater and have the electrical capacity to support it. I would especially recommend it for larger households, people who want to save space, and anyone looking for a more energy-efficient hot water solution. If someone has a smaller home or lower hot water demand, I think they may want to consider a smaller model.
My Final Thoughts
Overall, my buying guide for the Eco 27 Tankless Water Heater comes down to matching the unit with my home’s needs. I looked at capacity, efficiency, installation, and maintenance before making a choice. For me, the Eco 27 stands out as a strong option when I want reliable hot water, better energy use, and a compact design. If I were shopping again, I would use the same checklist to make sure it fits my household perfectly.
Final Thoughts
In my view, the Eco 27 Tankless Water Heater stands out as a strong choice for anyone looking to save space and enjoy a more efficient hot water system. I like that it delivers hot water on demand, which can help reduce energy waste compared to traditional tanks. My takeaway is that it’s a practical option for households that want reliable performance and long-term savings.
Author Profile
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I'm Steven Dawson, a Bozeman, Montana writer who has always preferred weekends outdoors to weekends indoors. Over the years, I found myself paying close attention to the gear that quietly made every trip easier and the products that never lived up to their promises.
Friends often asked for my opinion before buying something because they knew I'd give an honest answer, not the popular one. That habit eventually became River Road Rally Park, where I share practical.
First-person thoughts on products I use, compare, or carefully research. I believe the best recommendations come from everyday experience, curiosity, and learning from plenty of small mistakes.
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