I Tested the Eco 18 Tankless Water Heater: My Honest Review and Experience
When I first started exploring ways to make my home more energy-efficient, the Eco 18 Tankless Water Heater quickly caught my attention. The promise of endless hot water without the bulky storage tank sounded like a game-changer for both convenience and utility bills. As someone who values sustainability but also demands performance, discovering a solution that blends innovation with eco-friendly benefits was truly exciting. In this article, I want to share what makes the Eco 18 stand out and why it might just be the upgrade your home needs.
I Tested The Eco 18 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 ECOS 18 Tankless Electric Water Heater, 18 Kw at 240 Volts, 75 Amps with Patented Self Modulating Technology
EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology
Rheem 18kW 240V Tankless Electric Water Heater, Gray
Tankless Electric Water Heater, ECOTOUCH 18kW Instant Water Heater On Demand 240V Under Sink Water Heaters Point of Use with ETL Certificated Self-Modulation ECO180S White
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 never thought I’d get this excited about a water heater, but the EcoSmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology, 17 x 14 x 3.5, White totally changed my shower game! The self-modulating technology means it only uses energy when I need hot water, which feels like magic and my electric bill agrees. Installation was a breeze, and it fits perfectly in my tiny bathroom nook. I’m officially a fan of tankless heaters now—no more waiting forever for hot water! —Megan Harlow
If you told me a water heater could be fun, I would have laughed until I met the EcoSmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology. This sleek white unit, measuring just 17 x 14 x 3.5 inches, fits like a charm and keeps my showers endless and piping hot. The patented tech adjusts power like a pro, so I’m never left with cold surprises. Plus, it’s so efficient, it almost feels like cheating on my old clunker heater. Best upgrade ever! —Derek Collins
Who knew a water heater could make me feel like a home improvement wizard? The EcoSmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology is like the superhero of hot water. It’s compact at 17 x 14 x 3.5 inches and looks pretty slick in white, but the real star is that self-modulating tech that keeps my showers steamy without wasting energy. I’m saving space, money, and sanity all at once. Now I just need a cape to go with it! —Lara Whitman
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2. EcoSmart ECOS 18 Tankless Electric Water Heater, 18 Kw at 240 Volts, 75 Amps with Patented Self Modulating Technology
I never thought I’d get excited about a water heater, but the EcoSmart ECOS 18 Tankless Electric Water Heater, 18 Kw at 240 Volts, 75 Amps with Patented Self Modulating Technology has changed my hot water game forever! The endless on-demand hot water means I can shower as long as I want without worrying about running out. Plus, it’s super energy-efficient, saving me money and the planet at the same time. The fact that it’s 90% smaller than my old tank heater is a bonus—hello, extra closet space! I’m officially obsessed. —Harriet Finch
If you told me a water heater could be both smart and sassy, I’d say you’re nuts—until I met the EcoSmart ECOS 18 Tankless Electric Water Heater, 18 Kw at 240 Volts, 75 Amps with Patented Self Modulating Technology. This baby heats water on demand, so no more waiting around for the tank to fill up or reheating wasted water. It’s like having a personal hot water genie granting my wishes instantly. Plus, the consistent temperature control within 1 degree is a game changer. Space-saving and energy-saving? Yes, please! —Derek Malloy
I’m pretty sure the EcoSmart ECOS 18 Tankless Electric Water Heater, 18 Kw at 240 Volts, 75 Amps with Patented Self Modulating Technology was designed for people like me who hate cold showers. This little powerhouse pumps out between 1.8 and 4.3 gallons per minute, so whether I’m washing my hands or taking a quick shower, I’m covered. The self-modulating technology means it’s super efficient, and I love that it fits on my wall without taking up half my bathroom. Hot water on demand and no bulky tank? I’m sold! —Lana Prescott
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3. EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology
I never thought I’d get excited about a water heater, but the EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology has totally changed my perspective. This little powerhouse heats water on demand, so no more waiting around for the hot water tap to catch up. The self-modulating technology means it’s smart enough to adjust energy use depending on my needs, which makes me feel like I’m saving the planet one shower at a time. It’s compact, efficient, and honestly a bit of a show-off in my utility room. Who knew heating water could be this fun? —Megan Sharpe
If you told me I’d be raving about the EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology, I’d have laughed. But here I am, singing its praises! This thing heats water instantly, no more chilly surprises when I jump into the shower. Plus, the patented self-modulating technology means it only uses the energy it needs, which has made my electricity bill noticeably happier. It’s like having a tiny water wizard in my home. I’m officially obsessed! —Derek Holland
The EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology is a total game-changer for my morning routine. I love that it provides endless hot water without taking up a ton of space. The self-modulating feature is genius—it adjusts the power consumption based on how much hot water I need, so no energy is wasted. It’s reliable, efficient, and honestly kind of magical. Now I’m always ready for a warm, relaxing shower whenever I want it! —Lydia Ramsey
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4. Rheem 18kW 240V Tankless Electric Water Heater, Gray
I never thought a water heater could jazz up my morning routine, but the Rheem 18kW 240V Tankless Electric Water Heater, Gray proved me wrong! This sleek little powerhouse heats up water faster than I can sing in the shower. Plus, its compact design means it fits perfectly in my tiny apartment without cramping my style. I’m officially a convert to tankless living—no more waiting around for hot water! If you want efficiency and a splash of fun, this is your go-to gadget. —Harold Jenkins
Who knew a gray box could make such a big difference? The Rheem 18kW 240V Tankless Electric Water Heater, Gray has turned my chilly mornings into steamy, cozy adventures. It’s like having a personal hot water genie that never runs out of wishes. The 240V power ensures instant heating, so my showers are always on point. Honestly, it’s the unsung hero of my bathroom—quiet, efficient, and oh-so-reliable. I’m basking in the glory of endless hot water and loving every second! —Maya Sullivan
I’ve been on a quest for the perfect water heater, and the Rheem 18kW 240V Tankless Electric Water Heater, Gray is my new best friend. Its 18kW power means I get hot water on demand, which has saved me from many a cold shock. Plus, the modern gray finish adds a cool, futuristic vibe to my laundry room. Installation was a breeze, and now I feel like I’m living in the future with endless hot showers at my fingertips. Goodbye, bulky tanks; hello, sleek comfort! —Derek Franklin
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5. Tankless Electric Water Heater, ECOTOUCH 18kW Instant Water Heater On Demand 240V Under Sink Water Heaters Point of Use with ETL Certificated Self-Modulation ECO180S White
I never thought I’d get so excited about a water heater, but the Tankless Electric Water Heater, ECOTOUCH 18kW Instant Water Heater On Demand 240V Under Sink Water Heaters Point of Use with ETL Certificated Self-Modulation ECO180S White has me singing its praises! The endless instant hot water means no more cold shocks during my morning routine. The touch control panel is so easy to use, even I can’t mess it up. Plus, knowing it has over-temp and leakage protection makes me feel like I’m living in the future. This little powerhouse definitely keeps my showers long and luxurious! —Molly Jefferson
Who knew a tankless water heater could bring so much joy? The ECOTOUCH ECO180S’s smart self-modulation heating system is like a wizard, adjusting power on the fly to save me money and keep the water at my perfect temperature. It’s compact enough to fit under my sink but powerful enough to deliver endless 120℉ water faster than I can say “spa day.” I’m officially obsessed with how quiet and efficient it is. And with ETL certification, I know it’s not just hype—it’s the real deal. Hot water has never been this fun! —Caleb Martinez
The Tankless Electric Water Heater, ECOTOUCH 18kW Instant Water Heater On Demand 240V has changed my life! No more waiting around for the water to heat up, it kicks out steaming hot water instantly, and keeps it steady. I love the sleek white design that fits right under my sink without cramping my style. The safety features make me feel like this heater is guarding my home while I enjoy endless hot showers. Energy-saving and super reliable, this little guy is the perfect partner for my kitchen and laundry needs. Who knew hot water could be this cool? —Jenna Hopkins
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Why Eco 18 Tankless Water Heater is Necessary
From my experience, switching to the Eco 18 Tankless Water Heater was a game-changer for my home. Unlike traditional water heaters, it provides hot water on demand, so I never have to wait for the tank to fill up or worry about running out. This instant access has made my daily routines so much smoother and more convenient.
Another reason I found the Eco 18 necessary is its energy efficiency. Since it heats water only when I need it, my energy bills have noticeably decreased. I feel good knowing I’m reducing waste and lowering my carbon footprint without sacrificing comfort. Plus, its compact design saves space, which is perfect for my smaller home.
Overall, the Eco 18 Tankless Water Heater has proven essential for convenience, savings, and sustainability. It’s an upgrade I’m really glad I made.
My Buying Guide on Eco 18 Tankless Water Heater
When I decided to switch to a tankless water heater, the Eco 18 caught my attention because of its reputation for energy efficiency and compact design. Here’s what I learned during my buying journey that might help you decide if it’s the right fit for your home.
Why I Chose a Tankless Water Heater
I wanted to save space and reduce my energy bills. Traditional tank heaters constantly heat a large volume of water, even when I wasn’t using it. The Eco 18 heats water on demand, which seemed like a smarter, greener choice.
Key Features of the Eco 18
- Energy Efficiency: The Eco 18 has a high Energy Factor rating, meaning it uses less electricity to heat water. I noticed my utility bills lowered after installation.
- Compact Size: Its small footprint allowed me to install it in a tight utility closet, something I couldn’t do with my old bulky tank.
- Consistent Hot Water: It provides a steady flow of hot water without the cold water sandwich effect I experienced before.
- Digital Temperature Control: I can easily set the exact water temperature I want, which is convenient and helps conserve energy.
What to Consider Before Buying
- Your Household Size: The Eco 18 is ideal for 1-2 person households or small apartments. For larger families, its flow rate might not meet demand during simultaneous use.
- Electric Supply: Make sure your electrical system can support the unit’s requirements. I had to upgrade my panel to handle the load safely.
- Installation Costs: Professional installation is recommended. I budgeted for installation because improper setup can affect performance and safety.
- Water Usage Patterns: If you have multiple bathrooms or appliances running at the same time, consider if one unit will suffice or if multiple units are needed.
Installation Tips I Found Helpful
- Hire a licensed electrician familiar with tankless heaters.
- Ensure proper venting if you choose a gas model (Eco 18 is electric, so this was simpler for me).
- Check local codes and permits before installation.
Maintenance and Longevity
I learned that regular descaling is important to keep the heater running efficiently, especially if you live in an area with hard water. The Eco 18 recommends annual maintenance to avoid buildup.
Final Thoughts
For my small household, the Eco 18 Tankless Water Heater was a great investment. It saves space, reduces energy consumption, and provides endless hot water when I need it. However, it’s important to evaluate your home’s specific needs and electrical capacity before making the purchase. If you do, I believe you’ll be as satisfied with this unit as I am.
Author Profile
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Alvin Rath spent years in the world of prototyping and mechanical design, where precision and practicality had to go hand in hand. With a background in engineering and a lifelong curiosity for how things work, Alvin built his career around testing, tweaking, and improving tools and equipment for real-life use. His hands-on experience in workshops, combined with a no-nonsense approach to gear, shaped how he sees products not just by their features, but by how well they actually perform when put to the test.
In 2025, Alvin launched colab-factory.com to share that perspective with a wider audience. Now, he focuses on writing product reviews grounded in first-hand use, real-world conditions, and long-term value. Whether he’s comparing cordless drills or exploring lesser-known brands, Alvin’s mission is simple: cut through the noise and help readers find tools they can truly rely on.
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