3 Best Tankless Electric Smart Water Heaters of 2026
If you’re exploring the best tankless electric smart water heaters for 2025, you’ll find options that prioritize instant hot water, energy efficiency, and smart controls. Models like the EcoSmart ECO 18 and ECO 27 offer remarkable features, including digital temperature adjustments and high efficiency ratings up to 99.8%. Whether you’re fitting a small apartment or a busy household, these units promise reliable performance—yet choosing the right one depends on your specific hot water needs and setup. Let’s find out which models stand out in today’s market.
EcoSmart ECO 18 Electric Tankless Water Heater
- Configured for climates where incoming water temperature is 62 degrees F and above.
- Capable of heating over 2.5 gpm.
- Digital temperature control allows temperature settings in 1 degree increments.
Looking for a small, energy-saving way to get hot water whenever you need it? The EcoSmart ECO 18 Electric Tankless Water Heater might be just right for you. It’s a compact unit with 18 kW power that runs on 240V single-phase electricity. This heater has a digital thermostat that you can adjust in 1-degree steps, so you can set it exactly how you like.
The heater’s size is just 17 by 14 inches. That means it doesn’t take up much space and can fit in tight spots at home. It weighs only 14 pounds, so it’s easy to handle. It can warm water at a flow rate of up to 3.51 gallons per minute (GPM), which is enough for small households or specific sink-and-shower setups. Plus, it’s very efficient — 99.8% — so it uses less energy and helps lower your bills.
The LED display shows the current water temperature. This makes it simple to keep track of your settings and make quick adjustments.
This heater works well if you live in a climate where the incoming water temperature is around 62°F or higher. It’s great for those who want a space-saving, energy-efficient hot water option.
Pros:
- Small and light, easy to install in tight spaces.
- Very efficient, saving energy and money.
- Digital control with LED display makes adjustments simple.
Cons:
- Limited flow rate; it’s not good if you need hot water for multiple bathrooms at once.
- Installing it may require upgrading your electrical system, which can be costly and take time.
- Parts and installation services might have long shipping times or be expensive.
This heater is perfect if you need hot water in a small area or for a specific task. It helps save space and energy, making your home more eco-friendly and affordable.
EcoSmart ECO 27 Tankless Water Heater
- Configured for climates where incoming water temperature can reach as low as 37 degrees.
- Capable of heating nearly 3 gpm.
- Digital temperature control allows temperature settings in 1 degree increments.
The EcoSmart ECO 27 is a tankless electric water heater. It is a good choice for homes in cold areas or homes that need a lot of hot water. It has a strong 27 kW power, so it heats water fast. It is very efficient, with an efficiency of 99.8%. The heater is small, measuring about 17 by 17 inches, and lightweight. This makes it easy to install, but you should hire a professional to do the wiring. It can produce up to 6.6 gallons of hot water per minute. This makes it good for filling large tubs or running many faucets at once. It works best with water below 45°F. This means it can handle tough environments and multiple fixtures at the same time. No longer do you have to wait a long time for hot water.
Best For: Homes in cold places or big families that need a lot of hot water. It is good for running many fixtures or filling large tubs quickly.
Pros:
- Very energy-efficient, saving money on power bills
- Can give out up to 6.6 gallons of hot water per minute
- Small and wall-mounted, making it easy to install and saving space
Cons:
- Needs a professional to install the wiring and breaker
- Costs about $360 more than traditional tank heaters upfront
- Hot water may take a few seconds longer to arrive compared to tank units
14kW Tankless Electric Water Heater with Digital Display
- Note: Things to know before buying, Our Orbek tankless water heater electric 14kw requires a 240V/60AMP two-pole breaker, 1 set of 6 AWG wires and 1/2" NPT...
- Instant Hot Water Supply: Orbek electric tankless water heater 240v can provides up to 3.38 GPM of on demand endless hot water and ensure comfortable hot water...
- High Energy Efficiency: This on demand hot water heater electric utilizes water-electricity separation to minimize scale and corrosion. It provides endless hot...
Looking for hot water fast and without a big tank? The 14kW tankless electric water heater with a digital display can help. It heats water instantly whenever you need it. It runs on 240V and needs a 60AMP breaker.
This heater is small—only 14.2 inches tall—and saves more than half the space that traditional tank heaters take up. It’s easy to install and fits into small spots. It can supply up to 3.38 gallons of hot water per minute. That’s enough for 2-3 faucets or showers at the same time. Plus, it heats water in just 3 seconds, so you won’t wait long.
The digital display is clear and high definition. It lets you set the water temperature between 86°F and 140°F easily. You can keep the water warm just how you like it. Safety features are built-in, so it’s reliable and safe to use.
This heater is best for homeowners and small businesses. It gives you quick, steady hot water and simple temperature control. Its small size makes it easy to fit wherever you need.
Keep in mind, it needs a 240V power supply and a 60AMP breaker. If your electrical setup is different, you might need help installing it. The flow rate of 3.38 GPM might not be enough if you have many hot water uses at once. Also, it doesn’t come with remote control or smart features.
In short, this small, quick heater offers fast hot water, saves space, and is easy to control. It’s perfect for homes or small businesses that want reliable hot water without waiting.
Factors to Consider When Choosing Smart Water Heaters Tankless Electric
When choosing a smart tankless electric water heater, you’ll want to take into account your power capacity needs because undersized units can leave you shivering, while oversized ones might blast your electricity bill. Installation and wiring are equally important; understanding your home’s setup helps avoid surprises like rewiring or mounting difficulties. Finally, features like flow rate capacity, energy efficiency, durability, and support ensure your new heater keeps up with your demands and lasts through the years—because nobody wants a hot water hiccup right before the big breakfast.
Power Capacity Needs
Have you ever wondered how much power your tankless electric water heater needs? The answer depends on your family’s hot water needs and the heater’s power, measured in kilowatts (kW). If you have a small household or just one thing running, like one shower, an 18 kW heater usually works fine. But if your family showers at the same time, uses the dishwasher, and runs the washing machine, you may need a 27 kW unit.
Heaters with more power can make more hot water per minute, so everyone gets hot water without waiting. To make sure you pick the right size, you should find out your peak usage—when everyone is using hot water at once. This helps you avoid wasting energy or ending up with cold water. Picking the right heater size keeps everyone comfortable and saves energy.
Installation and Wiring
Installing a tankless electric water heater isn’t hard, but you need to follow some safety rules. First, your electrical system must have a special breaker. This breaker should be double-pole and rated at 40 amps. Think of it as giving your heater its own lane in the breaker box so it gets enough power safely.
Next, the wiring needs to meet local electrical rules. Usually, 8 AWG copper wires work well because they can carry 112 amps or more. Before installing, check if your main or subpanel has enough space and power for the heater. It’s important to plan this step carefully.
During installation, make sure the heater is grounded properly. Follow the wiring diagram that comes with the heater to avoid mistakes. Proper wiring and grounding keep everything safe and help your warranty stay valid.
Since working with electricity can be tricky, it’s a good idea to hire a professional electrician. They will make sure everything is installed safely, correctly, and up to code. This way, your heater will work well and stay safe to use.
Flow Rate Capacity
Ever wonder how much hot water your tankless electric heater can give you at once? The answer is in its flow rate capacity. This is measured in gallons per minute (GPM). It shows how much water the heater can move through it each minute. A higher GPM means it can run more fixtures or appliances at the same time without cold water. For example, a 5 GPM heater can handle a shower plus a sink running together. But if you want to run several showers or appliances at once, you need a bigger capacity. The capacity depends on the water temperature coming into your home and the temperature you want out. It can change a lot. To keep everything working smoothly, choose a heater that matches your household’s water needs during busy times. If not, you might end up with cold water when everyone showers at the same time!
Energy Efficiency Features
Looking to get the best energy use from your tankless electric water heater? Pick a model with a high energy efficiency rating, like 99.8%. This helps save on your electricity bills. Digital temperature controls are a helpful feature. They let you set the heat just right, so no energy is wasted. Self-modulating technology is another smart feature. It adjusts the heat automatically based on how much hot water you need. This makes the heater more efficient without you doing anything extra. Safety features like leak detection and over-temperature shutoff are important. They help prevent energy loss and protect your home. Make sure to choose a unit that fits your hot water needs. An undersized heater will struggle to keep up, and an oversized one wastes energy. Find the right size for your household. When you do, you’ll get instant hot water that doesn’t cost much to run.
Durability and Support
When picking a tankless electric water heater, how long it lasts and the support you get matter a lot. Quality parts like copper heat exchangers and stainless steel pieces keep the unit from rusting. This makes your water heater last longer. Brands that offer a lifetime warranty on parts like heating elements and electronics show they are confident in their product. Good support services, like easy-to-reach technical help and helpful troubleshooting guides, help keep your heater working smoothly. Regular maintenance, such as flushing out minerals and checking electrical connections, can also help it last longer and save you money on repairs. Brands that sell replacement parts easily make fixing the heater simple, so you’re less likely to be left without hot water unexpectedly.
FAQs
How Do Smart Features Improve Water Heater Efficiency?
Smart features boost your water heater’s efficiency by allowing you to monitor usage, adjust settings remotely, and optimize heating times, which reduces energy waste. You gain better control, save money, and enjoy consistent hot water.
What Is the Lifespan of These Tankless Electric Water Heaters?
You’ll find that tankless electric water heaters typically last around 20 years with proper maintenance. Regular inspections, descaling, and prompt repairs help extend their lifespan, ensuring you enjoy efficient, reliable hot water for years to come.
Are Smart Water Heaters Compatible With Existing Home Automation Systems?
You can typically integrate smart water heaters with your existing home automation system if they support standard protocols like Wi-Fi, Zigbee, or Z-Wave, allowing you to control and monitor them remotely for added convenience and efficiency.
What Safety Certifications Should I Look for in 2025 Models?
You should look for safety certifications like UL, ETL, or CSA in 2025 models. These guarantee the heater meets safety standards, preventing electrical hazards and ensuring reliable performance, so you can trust your appliance’s safety and efficiency.
How Do I Troubleshoot Common Issues Remotely?
When troubleshooting remotely, check the user manual for error codes, guarantee your app is updated, reset the unit if needed, and contact customer support if the issue persists. Regular maintenance also helps prevent problems.
DK is a technology expert who specializes in AI tools, software, and tech gadgets. He writes for How to Tech Info, providing detailed reviews and practical guides. DK helps readers discover the best AI applications, navigate new software, and choose the right tech gadgets.
Last update on 2026-01-14 / Affiliate links / Images from Amazon Product Advertising API This site is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.
