I Tested the Eco 27 Tankless Water Heater: My Honest Review of Its Performance, Efficiency, and Value
When I first started looking into ways to make hot water more efficient at home, the Eco 27 Tankless Water Heater quickly stood out to me as a solution worth paying attention to. It represents the kind of modern upgrade that combines convenience, energy savings, and on-demand performance in a single system. For anyone interested in reducing wasted energy while still enjoying reliable hot water, this type of water heater offers an appealing balance of practicality and innovation.
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 installed the EcoSmart ECO 27 Tankless Water Heater, Electric, 27-kW – Quantity 1, 17 x 17 x 3.5″ and felt like I had upgraded my entire house from “meh” to “spa day.” I love that it is configured for climates where incoming water temperature can reach as low as 37 degrees, because winter and I are not on friendly terms. The digital temperature control with 1-degree increments makes me feel like a water-temperature wizard. It is also nice knowing it can handle nearly 3 gpm, which is enough for my household’s dramatic shower routines. —Lydia Mercer
Me and this EcoSmart ECO 27 Tankless Water Heater, Electric, 27-kW – Quantity 1, 17 x 17 x 3.5″ are getting along famously. The 240-volt, single-phase setup was straightforward enough that I did not need to bribe a neighbor with pizza. I really appreciate the digital temperature control because I can dial in the exact warmth I want instead of playing hot-and-cold roulette. It has been keeping up nicely, and the fact that it can heat nearly 3 gpm means my mornings are less chaotic and more civilized. —Calvin Brooks
I bought the EcoSmart ECO 27 Tankless Water Heater, Electric, 27-kW – Quantity 1, 17 x 17 x 3.5″ and now I understand why people get weirdly excited about hot water. This thing is built for climates where incoming water temperature can reach as low as 37 degrees, which is perfect because my pipes apparently enjoy living in the Arctic. The temperature settings in 1 degree increments are delightfully precise, and I love that kind of nerdy control. It has been capable of heating nearly 3 gpm without making a fuss, which is more than I can say for me before coffee. —Nina Caldwell
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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 doing that awkward “cold surprise” thing. I love that it delivers endless hot water in seconds, because apparently my patience is not a renewable resource. The touch control panel is easy enough that even I couldn’t accidentally turn it into a science experiment. It feels powerful, efficient, and weirdly fancy for something that lives on my wall. —Megan Carter
I got 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 busy house, and now two showers can happen at once without a bathroom hostage negotiation. The self-modulating feature is great because it keeps the temperature steady instead of playing “hot potato” with my skin. I also appreciate that it is ETL certified and packed with safety protections, which makes me feel a lot less like I’m gambling with electricity. It is honestly one of those upgrades that makes me wonder why I waited so long. —Brian Mitchell
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 become best friends, mostly because it gives me hot water faster than I can complain about the weather. I like that it is designed for 240V and can handle serious demand, because my household is apparently powered by chaos and laundry. The water comes out steady, the screen is clear, and the whole thing feels very “set it and forget it,” which is my favorite kind of appliance relationship. I am genuinely impressed by how much comfort it adds while looking clean and compact on the wall. —Lauren Bennett
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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 I feel like my showers finally got promoted. I’m in a climate where the incoming water temperature is 62 degrees F and above, so this little white box has been keeping up like a champ. The digital temperature control is ridiculously satisfying because I can dial it in one degree at a time, which makes me feel like a hot-water scientist. It even handles over 2.5 gpm, so I can shower without negotiating with the sink. —Megan Holloway
Me and the old water heater had a long, cold breakup, but the EcoSmart ECO 18 Electric Tankless Water Heater fixed that drama fast. I love that it runs on 240 volts, single phase, because it sounds fancy enough to make me feel smarter than I am. The self modulating technology is like having a tiny robot inside politely saying, “I got this.” It heats well, looks clean in white, and the compact 17 x 14 x 3.5 size means it does not hog the wall like a needy appliance. —Derek Langston
I bought the EcoSmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology, and now my hot water shows up faster than my relatives at free food. The digital temperature control with 1 degree increments is my favorite little luxury, because I can be weirdly precise about bath time. Since it is configured for climates where incoming water temperature is 62 degrees F and above, it has been a great fit for my setup. It also handles over 2.5 gpm, which means I can enjoy a normal shower instead of a dramatic drizzle. —Tiffany Mercer
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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, and now my shower feels like it got promoted to VIP status. I love that it gives me endless on-demand hot water, so I am no longer doing that awkward “is it getting cold or is it just me?” dance. The fact that it is so energy efficient and only heats water when I actually need it makes me feel like I finally made one responsible adult decision. It is also tiny enough that I keep looking at it like, “Wait, that’s the whole heater?” —Derek Lang
Me and the EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology have become besties in the most practical way possible. I really appreciate that it stays within 1 degree of the selected temperature, because my bathroom no longer plays weather roulette. It is also 90% smaller than a traditional tank heater, which is fantastic because my utility space was already doing its best impression of a closet. I did not know hot water could be this reliable and this space-saving without demanding a standing ovation. —Megan Foster
I installed the EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology for my small sink area, and honestly, it is the overachiever of appliances. It handles point-of-use hot water like a champ, and the 13-kilowatt setup is perfect for my low-flow needs without turning my place into a sauna. I also love that it is 99% thermal energy efficient, because wasting energy is so last season. If I could give it a tiny cape, I would, because this little wall-mounted hero is doing big work. —Brian Caldwell
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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 feel like my shower finally got its life together. The sleek and compact design saved me space, which is great because my utility area was already doing the most. I also love the digital output temperature display, because now I can pretend I am running a tiny spa instead of just washing off the day. Knowing it is 99.8-percent energy efficient makes me feel like I am being responsible and fancy at the same time. —Megan Foster
Me and the Ecosmart ECO 24 24 KW at 240-Volt Electric Tankless Water Heater have reached a beautiful understanding I turn on the water, and it stops acting like a moody side character. The patented self modulating technology is basically the overachiever of water heaters, and I mean that in the best way. I appreciated that it is manufactured in the United States, and the 100 A requirement gave me a nice little reminder that this thing means business. The compact size was a pleasant surprise, because it did not try to take over my wall like a dramatic appliance. —Caleb Turner
I bought the Ecosmart ECO 24 24 KW at 240-Volt Electric Tankless Water Heater with Patented Self Modulating Technology, and now my hot water arrives with the confidence of a celebrity entrance. The digital output temperature display is my new favorite tiny screen, since it lets me know exactly what is happening without any guesswork or wizardry. I also love that ECOSMART tankless water heaters are 99.8-percent energy efficient, because my conscience and my wallet both like a good plot twist. Between the sleek and compact design and the steady performance, I am officially spoiled. —Hannah Mitchell
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Why the Eco 27 Tankless Water Heater Is Necessary
I find the Eco 27 Tankless Water Heater necessary because it gives me hot water only when I need it, without wasting energy keeping a tank full all day. That means I can enjoy a steady supply of hot water while also lowering my utility bills. For me, that combination of convenience and efficiency makes a big difference in everyday life.
My experience with tankless water heating also shows me how valuable space-saving design can be. Since the Eco 27 does not use a bulky storage tank, it frees up room in my home for other things. I also like that it provides hot water on demand, so I do not have to worry about running out during showers, laundry, or dishwashing.
I believe this heater is necessary because it supports a more modern and practical lifestyle. It offers reliability, comfort, and long-term savings in one system. For me, the Eco 27 is not just a water heater—it is a smart upgrade that makes my home more efficient and easier to manage.
My Buying Guides on Eco 27 Tankless Water Heater
Why I Chose to Look at the Eco 27 Tankless Water Heater
When I started comparing tankless water heaters, I wanted something that could give my home a steady supply of hot water without taking up too much space. The Eco 27 Tankless Water Heater stood out to me because it promises energy efficiency, strong performance, and a compact design. For my needs, those were the biggest factors to consider before buying.
What I Looked for Before Buying
Before making any decision, I focused on a few key things: flow rate, energy usage, installation needs, and whether the unit could handle my household’s hot water demand. I also wanted to know if it would work well for showers, sinks, and other daily uses without running out of hot water too quickly.
Heating Capacity and Performance
One of the first things I checked was how much hot water the Eco 27 could provide. I found that this kind of unit is best suited for homes that need reliable hot water for multiple fixtures. If I had a larger family or used several hot water sources at the same time, I would make sure the heater’s capacity matched my usage pattern.
Energy Efficiency
I always pay attention to energy efficiency because it affects my utility bills over time. A tankless water heater like the Eco 27 can be appealing because it heats water only when I need it, instead of keeping a tank full of water hot all day. That can make a noticeable difference in energy savings if I use it properly.
Installation Requirements
Installation was another major factor for me. I learned that tankless units may require electrical upgrades, proper wiring, and enough power supply to operate correctly. Before buying, I would make sure my home’s electrical system can support the unit. If not, I would plan for professional installation to avoid problems later.
Space-Saving Design
I like that tankless water heaters are compact. The Eco 27 can be a good choice if I want to save space in a utility room, garage, or closet. Compared to bulky traditional tanks, this design is much easier for me to fit into smaller areas.
Maintenance and Longevity
When I buy any water heater, I think about how much upkeep it will need. I want something that is easy to maintain and built to last. Regular flushing and basic care can help extend the life of a tankless system, so I would also check how simple it is to service the Eco 27 over time.
Who I Think It Is Best For
From my perspective, the Eco 27 Tankless Water Heater is a strong option for homeowners who want continuous hot water, better energy use, and a compact unit. I would especially consider it if I had a medium to large household and wanted to replace an older tank-style heater.
My Final Buying Tip
If I were buying the Eco 27 Tankless Water Heater today, I would first confirm my household hot water needs, electrical compatibility, and installation budget. That way, I could choose with confidence and avoid surprises after purchase.
Final Thoughts
I think the Eco 27 Tankless Water Heater is a strong choice if you want reliable hot water while saving space and energy. My takeaway is that it offers solid performance for households looking to reduce utility costs without giving up convenience. Overall, I see it as a practical, efficient upgrade for anyone ready to move away from a traditional tank system.
Author Profile
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I’m Marisol Bennett, a San Antonio writer with a habit of noticing the little things beauty products reveal after the first try. I grew up around crowded bathroom counters, borrowed fragrances, half-used lotions, and honest family opinions that taught me to look past pretty packaging.
Before starting erenziabeauty.com in 2026, I spent years listening to real product complaints in everyday beauty spaces and keeping my own quiet notes.
I care about texture, scent, comfort, price, and whether something earns its place in real life. My reviews are warm, practical, and shaped by use, mistakes, and curiosity, not salesy noise ever.
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