You could have to take a chilly shower if you don’t have an EcoSmart tankless water heater! Curious to learn more about it? Okay, let’s take a tour of this article.? Here, you will get a detailed guide on the EcoSmart tankless water heater including the 7 Best EcoSmart Tankless Water Heaters.?
You see, tank-style water heaters can only produce a certain amount of hot water, whereas a tankless heater like the EcoSmart can continuously produce scalding water. I will explore this sleek, no-nonsense tankless water heater in-depth and objectively through this review. If it isn’t on your shortlist currently, the EcoSmart is definitely worth a second look.
| Best Overall | Best for Moderate Demand | Best for Small Homes | Best Point-of-Use |
| EcoSmart ECOS 27 | EcoSmart ECOS 18 | EcoSmart ECO 11 | EcoSmart POU 4T |
| Highest capacity in this lineup, with self-modulating technology and strong performance for higher hot-water demand. | A balanced option for households needing more capacity without stepping up to the ECOS 27. | Compact and suitable for one or two applications, making it a practical choice for smaller households. | A compact, affordable option designed for one low-flow faucet or other point-of-use applications. |
| $549.00 | $411.73 | $249.00 | $166.72 |
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7 Best EcoSmart Tankless Water Heaters to Share the Warmth
We’re here to help since it’s important to conduct your research before making such a serious approach. This section will cover the benefits and drawbacks of each model as well as the features and technical details of the top 7 EcoSmart tankless water heaters.
| Model | Best For | Power | Price |
| EcoSmart ECOS 27 | Best overall / high demand | 27 kW | $549.00 |
| EcoSmart ECOS 18 | Smaller whole-home applications | 18 kW | $411.73 |
| EcoSmart ECO 11 | Small homes / point of use | 13 kW | $249.00 |
| EcoSmart POU 4T | One low-flow faucet | 3.5 kW | $166.72 |
| EcoSmart ECO 8 | Compact point-of-use use | 8 kW | $218.85 |
| EcoSmart SmartBoost ECOTB240 | Boosting an existing tank | 7.2 kW | $319.51 |
| EcoSmart ECOMINI6 | Small stored-hot-water needs | 6 gal | $215.00 |
1. EcoSmart ECOS 27: Best overall for high-demand electric Tankless Electric Water Heater
The EcoSmart ECOS 27 is the strongest candidate in this lineup for buyers who need substantial electric heating capacity. Its 27-kW output operates at 240 volts and draws up to 112.5 amps. EcoSmart recommends a 200-amp household electrical service, along with three 40-amp double-pole breakers.
That electrical requirement is the biggest consideration. In other words, this is not a simple plug-and-play replacement for a conventional tank. However, once the electrical infrastructure is properly sized, the ECOS 27 offers strong on-demand performance without a storage tank or gas venting. EcoSmart rates the ECOS 27 at a UEF of up to 0.94 and gives it digital temperature controls adjustable in 1-degree increments. The unit also has a stainless-steel heat exchanger, a 0.3-GPM activation flow, and a compact wall-mounted design.
For households in warmer climates where incoming groundwater is relatively warm, this model can support multiple fixtures simultaneously. Colder incoming water, however, reduces the flow available at a given temperature rise, so proper sizing remains critical.
Key Specifications
- Power: 27 kW
- Voltage: 240V
- Maximum amperage: 112.5A
- Recommended household service: 200A
- Breakers: 3 × 40A double-pole
- Wire: 8 AWG
- Water connections: 3/4-inch NPT
- Activation flow: 0.3 GPM
- Dimensions: 19 × 9.25 × 4.25 inches
- UEF: Up to 0.94
- Warranty: 5 years leaks / 1 year parts
Core Features
- Self-modulating technology adjusts power according to demand.
- Digital thermostatic control allows 1-degree temperature adjustments.
- No gas venting is required.
- Compact wall-mounted construction saves installation space.
- Stainless-steel heat exchanger provides corrosion resistance.
- 0.3-GPM activation flow starts heating when sufficient water flow is detected.
- No standby tank losses because water is heated as it is needed.
Pros
- Excellent output for a high-demand electric model
- Compact compared with a traditional storage tank
- Self-modulating operation
- No gas line or venting required
- Strong choice for warmer climates
- Stainless-steel heat exchanger
Cons
- Requires substantial electrical capacity
- Installation can be expensive
- May require electrical panel upgrades
- Cold incoming water can limit simultaneous flow
Best For
- Large households, high hot-water demand, warmer climates, and homeowners with adequate electrical service.
Price: $549.00
2. EcoSmart ECOS 18: Best for moderate hot-water demand Tankless Water Heater
The EcoSmart ECOS 18 takes a step down from the ECOS 27 while retaining the same general philosophy: compact construction, on-demand heating, self-modulation, and digital temperature control. At 18 kW and 240 volts, it draws up to 75 amps. EcoSmart lists a recommended 150-amp household electrical service and two 40-amp double-pole breakers for this model.
That makes it considerably less demanding than the 27-kW version, although it still requires professional electrical planning. EcoSmart says ECOS models are designed for applications ranging from point-of-use installations to residential hot-water needs. The supplied product information lists a flow range of approximately 1.8 to 4.3 GPM, depending on incoming water temperature. That distinction matters because GPM and temperature rise work together. A heater may deliver impressive flow with warm incoming water but less flow when groundwater is cold.
For many homes, the ECOS 18 strikes a useful middle ground. It offers more capacity than small point-of-use units without jumping all the way to the electrical demand of the ECOS 27.
Key Specifications
- Power: 18 kW
- Voltage: 240V
- Amperage: 75A
- Recommended household service: 150A
- Breakers: 2 × 40A double-pole
- Wire: 8 AWG
- Dimensions: approximately 19 × 9.25 × 4.25 inches
- Flow: Approximately 1.8–4.3 GPM depending on inlet temperature
- Warranty: 5 years leaks / 1 year parts
Core Features
- 18-kW heating capacity
- Self-modulating technology
- Digital temperature adjustment
- Compact wall-mounted design
- No gas venting
- Stainless-steel heat exchanger
- On-demand operation
Pros
- Stronger than small point-of-use models
- Smaller electrical requirement than ECOS 27
- Compact footprint
- No standby tank
- Easy digital temperature adjustment
Cons
- Still requires significant electrical capacity
- Performance depends on incoming water temperature
- Professional installation is recommended
- Not necessarily suitable for very high simultaneous demand
Best For
- Moderate residential demand, smaller homes, and applications where ECOS 27 capacity is unnecessary.
Price: $411.73
3. EcoSmart ECO 11: Best for small homes and point-of-use Electric Tankless Water Heater
The EcoSmart ECO 11 is one of the more practical choices for buyers who do not need a large whole-home heater. Despite the product listing sometimes using confusing capacity information, EcoSmart’s current documentation identifies this model as a 13-kW, 240-volt electric tankless heater with a maximum draw of 54 amps.
EcoSmart positions the ECO 11 for one or two applications. In warmer climates, it can accommodate a shower, while lower-flow applications such as bathroom faucets are more appropriate where incoming water is colder. The compact 11.4 × 7.9 × 3.7-inch design is particularly appealing when installation space is tight. It also uses a copper heat exchanger and self-modulating technology.
Another advantage is its relatively straightforward electrical requirement compared with the larger models. EcoSmart specifies a 60-amp double-pole breaker and 6 AWG wire. Still, this is a high-power appliance, so the circuit should be designed and installed according to local code.
Key Specifications
- Power: 13 kW
- Voltage: 240V
- Amperage: 54A
- Breaker: 1 × 60A double-pole
- Wire: 6 AWG
- Dimensions: 11.4 × 7.9 × 3.7 inches
- Activation flow: 0.3 GPM
- Heat exchanger: Copper
- Warranty: Limited lifetime
Core Features
- Self-modulating technology
- Digital temperature adjustment
- Compact point-of-use design
- Copper heating elements
- Copper heat exchanger
- No gas venting
- 0.3-GPM activation flow
Pros
- Compact
- Lower power requirement than larger models
- Good for one or two applications
- Lifetime limited warranty
- Digital temperature controls
Cons
- Limited simultaneous-flow capability
- Cold groundwater can reduce performance
- Requires a dedicated high-amperage circuit
- Not ideal for a large family with multiple showers
Best For
- Small homes, apartments, bathroom faucets, and warmer-climate shower applications.
Price: $249.00
4. EcoSmart POU 4T 3.5-kW Point-of-Use: Best for a single low-flow faucet Tankless Water Heater
If your goal is simply to get hot water to a small sink without running a long hot-water line, the EcoSmart POU 4T makes a lot of sense. It is a genuine point-of-use tankless model rather than a whole-home system. The unit operates at 3.5 kW and 120 volts and is designed for one low-flow faucet. EcoSmart specifically recommends it for applications such as a small sink, bathroom, office breakroom, wet bar, or RV.
Its thermostatic control adjusts in 1-degree increments from 80°F to 140°F. EcoSmart also includes optional 0.35-GPM aerators designed to help maintain consistent temperature and flow. The 7 × 11 × 3-inch body is remarkably compact. In addition, it needs only one 30-amp single-pole breaker and 10 AWG wire according to EcoSmart’s current specifications.
This isn’t the model to buy for several showers. However, for a single low-flow faucet, it can be just the ticket.
Key Specifications
- Power: 3.5 kW
- Voltage: 120V
- Amperage: 29A
- Breaker: 1 × 30A single-pole
- Wire: 10 AWG
- Dimensions: 7 × 11 × 3 inches
- Activation flow: 0.25 GPM
- UEF: Up to 0.95
- Warranty: 5 years leaks / 1 year parts
Core Features
- Thermostatic temperature control
- 1-degree temperature adjustments
- 120V operation
- Compact point-of-use design
- No venting
- Self-modulating operation
- Optional low-flow aerators
Pros
- Very compact
- Uses ordinary 120V household voltage
- Excellent for one faucet
- High efficiency
- No storage tank
- Easy point-of-use placement
Cons
- Not a whole-house heater
- Limited flow
- Requires a dedicated 30A circuit
- Not suitable for multiple fixtures
Best For
- Kitchen sinks, bathroom sinks, wet bars, offices, RVs, and other low-flow applications.
Price: $166.72
5. EcoSmart ECO 8: Best for compact low-demand installations Electric Tankless Water Heater
The EcoSmart ECO 8 sits between a small point-of-use heater and the larger ECO series models. It provides 8 kW of heating capacity at 240 volts and is designed for smaller applications. EcoSmart’s current electrical documentation lists a maximum draw of 33 amps, with a 40-amp breaker and 8 AWG wire.
This model is better suited to modest hot-water requirements than demanding whole-home applications. Therefore, buyers should pay close attention to groundwater temperature and desired flow rate. One advantage of the ECO 8 is its small form factor. It can work well when space is limited, while its digital temperature display makes everyday adjustment straightforward.
However, it is important not to confuse compact size with unlimited capacity. A tankless heater still has a maximum heating output. If several fixtures demand hot water simultaneously, the ECO 8 may struggle to maintain the desired temperature.
Key Specifications
- Power: 8 kW
- Voltage: 240V
- Maximum amperage: 33A
- Breaker: 1 × 40A
- Wire: 8 AWG
- Heating element: 1
- Temperature display: Digital
- Warranty: Limited lifetime in the U.S., with registration requirements
Core Features
- Self-modulating heating
- Compact construction
- Digital temperature display
- Copper heating element
- Point-of-use suitability
- No gas venting
Pros
- Compact
- More affordable than high-capacity models
- Digital controls
- Suitable for lower-demand applications
- No standby tank losses
Cons
- Limited output
- Not ideal for multiple simultaneous showers
- Requires a dedicated 240V circuit
- Cold water reduces available flow
Best For
- Small homes, low-demand bathrooms, offices, and point-of-use installations.
Price: $218.85
6. EcoSmart SmartBoost ECOTB240 7.2-kW: Best for extending an existing tank’s hot-water
The EcoSmart SmartBoost ECOTB240 deserves a special mention because it is not a replacement for a standalone tankless water heater. Instead, it works with an existing storage-tank water heater. EcoSmart says SmartBoost can increase deliverable hot water by up to 45% and installs on the tank outlet, either directly or on a nearby wall.
This approach makes sense for households that already have a functioning tank but regularly run out of hot water. Rather than replacing the entire system, SmartBoost adds electric tankless heating capacity downstream. The 240V model uses 7.2 kW and draws 30 amps. EcoSmart specifies a 30-amp double-pole breaker and 10 AWG wire. It also has a digital display showing inlet and outlet temperature, flow rate, operating status, and electricity load.
So, if your existing tank is still in good shape, this model could be a cost-effective middle ground.
Key Specifications
- Power: 7.2 kW at 240V
- Amperage: 30A
- Breaker: 1 × 30A double-pole
- Wire: 10 AWG
- UEF: Up to 0.96
- Flow activation: 0.3 GPM
- Dimensions: 8 × 11.5 × 3.75 inches
- Weight: 5.4 lb
- Warranty: Limited lifetime with registration
Core Features
- Up to 45% more deliverable hot water
- Tank outlet installation
- Digital temperature and flow display
- Self-modulating operation
- Eco mode
- Vacation mode
- Freeze protection
- Compact construction
Pros
- Extends an existing tank
- Can reduce the need for a full replacement
- Compact
- Strong efficiency rating
- Useful digital monitoring
Cons
- Requires an existing tank
- Not a standalone whole-house tankless heater
- Requires a 240V circuit
- Installation can be more complicated than a simple point-of-use unit
Best For
- Homes with an existing tank that need more usable hot water without replacing the entire system.
Price: $319.51
7. EcoSmart ECOMINI6: Best for small stored-hot-water Electric Mini Tank Water Heater
The EcoSmart ECOMINI6 needs one important clarification: it is a 6-gallon mini-tank water heater, not a tankless model. EcoSmart lists its MiniTank products separately from its electric tankless range. That doesn’t make it a bad product. In fact, a small tank can be a sensible solution for a sink, office, guest room, or other low-demand application where you want a small reserve of hot water.
The supplied listing describes a compact design, digital output temperature display, and 12-amp electrical demand. The 6-gallon capacity provides stored hot water, so its operating behavior differs from the tankless products above.
If your goal is specifically zero standby storage and true on-demand heating, choose one of the tankless models instead. On the other hand, if you want a compact reserve of hot water without installing a full-size tank, the MiniTank can be a practical alternative. EcoSmart currently lists its MiniTank range with a separate warranty structure: six years for leaks and two years for parts.
Key Specifications
- Capacity: 6 gallons
- Type: Mini-tank
- Power: Electric
- Electrical draw: 12A according to supplied listing
- Display: Digital output temperature
- Color: White
- Design: Compact
Core Features
- 6-gallon storage capacity
- Compact construction
- Digital temperature display
- Electric operation
- Designed for smaller hot-water needs
Pros
- Provides stored hot water
- Compact compared with full-size tanks
- Useful for isolated applications
- Easy to understand and operate
Cons
- Not tankless
- Has stored-water capacity
- Can experience standby heat loss
- Not designed for whole-home demand
Best For
- Offices, guest spaces, utility sinks, small bathrooms, and locations where a compact hot-water reserve is more useful than true on-demand heating.
Price: $215.00
What Are the Types of EcoSmart Tankless Water Heaters?
Since tankless water heaters save space, are more energy-efficient, and are generally better for the environment, tankless water heaters are a recent product that is in high demand. The EcoSmart and the Rheem Performance tankless water heater are fairly comparable products. Both are typically regarded as the top tankless electric water heaters available today.
These appliances are also referred to as demand-type or instantaneous water heaters and give their users hot water whenever they need it. In this market, EcoSmart water heaters are available in 6 different types.
Tankless Electric Water Heaters
A tankless electric water heater with self-modulating technology, the EcoSmart point-of-use thermostatic series model number 4T only uses the energy required for each use. The POU 4T and POU 6T variants are equally suitable for bathrooms, wet bars, and office breakrooms and are excellent for handwashing in cooler climes. For example, EcoSmart ECO 11 Electric Tankless Water Heater will be the best choice for the tankless electric water heater.
Tankless Gas Water Heaters
Designed for infinite hot water, ultra-low NOx, and mid-efficiency tankless gas water heaters. Hot-start programming reduces “cold water sandwich” a fluctuation in water temperature that occurs during periods of frequent on/off operation. When used the water savings setting can help homes save up to 1,100 gallons of water annually by reducing the flow of water through the pipes until the temperature is at the set point for the heater.
In this case, you can try EcoSmart Tankless Gas Water Heater to get the best experience.
Condensing Tankless
Tankless gas water heaters with high-efficiency condensing technology are made to provide limitless hot water. Dual heat exchangers are used in condensing tankless heaters to maximize the system’s utilization of energy. In this regard, ESGH-95 Indoor Direct Vent Condensing Tankless Gas Water Heater will be the top-rated condensing tankless EcoSmart water heater.
Water Heater Boosters
A device that can be connected to your current hot water heater is called a hot water heater booster. It is designed to work with a tank in order to supply extra hot water. You can choose SmartBoost from EcoSmart for your new or existing hot water heater to get the most out of it. Your existing gas or electric tank will become 45% more effective and perform to the level of a much larger tank thanks to SmartBoost.
ECO Mini
You can find good things in tiny containers. From your garage or outdoor kitchen to your recreational vehicle, EcoSmart ECO MINI 2.5 delivers hot water exactly where you need it. This handy little problem-solver offers warmth wherever you go. By avoiding the delay for hot water to reach the faucet, water can be saved.
Pool & Spa Heaters
For on-demand pool heating, the Smart POOL Series like Smart Pool 27 can deliver a temperature increase of 1° to 1.5° F every hour. Rather than the conventional pressure switch activation and contactors, EcoSmart Pool Heaters use the most recent flow sensor technology. It will help to boost functionality and dependability while lowering the danger of burned components.
Why Should You Choose EcoSmart Tankless Water Heater?
EcoSmart wants to create and market high-quality, cost-effective green energy solutions for consumers. The field of water heating is where EcoSmart mostly focuses. Since energy used to heat water can make up as much as 25% of the average energy bill due to antiquated practices like tank storage, it is their mission to help consumers save money. When compared to a storage tank, EcoSmart’s proprietary self-modulating technology can help clients save up to 50% on their water heating costs.
The secret to energy conservation for customers and the environment is on-demand hot water. This is the driving force behind EcoSmart’s creation of a whole array of tankless technology for different residential and business applications.
Patented Self-Modulating Technology
With the exception of the POU models, all EcoSmart electric tankless water heaters activate at .25 GPM and use Flow Sensor technology. To match the demand for hot water, the flow sensor regulates energy use. Instead of modulating, flow switch activation turns on or off the power to the heating components to turn the device on.
On the other hand, currently available tankless water heaters use a flow switch to function. When hot water is required, the flow switch is activated by being pushed or moved by the water flow. The majority of flow switches are made to turn on the devices at flow rates between ? to 1 GPM.
Temperature Control
Except for POU versions, all EcoSmart electric tankless water heaters have a digital display that shows the outlet water temperature setting. The digital temperature control has a range of 80 to 140 degrees Fahrenheit and may be changed to 1degrees Fahrenheit. You may set the temperature controls and forget about them.
Heat Exchangers & Elements
The components that the water flows through to heat up are heat exchangers and elements. The exchangers contain the components, which are used to heat the water. Standard heating elements composed of either copper or stainless steel are included with all EcoSmart electric tankless water heaters. To avoid electrolysis and make it simple to screw in and out, these elements have a brass cap that fits over the top of the exchangers, which can also be constructed of copper or stainless steel depending on the model.
These components are frequently enclosed with a poly-plastic exchanger, which reduces energy efficiency and increases heat dissipation. EcoSmart tankless water heaters contain heat exchangers and standard, dependable elements that are 99.8% efficient at using energy.
Design
The unit’s simplicity and the way its various parts work together as a whole are taken into account in the overall design in order to maximize functionality, serviceability, and longevity. Instead of a manually resettable thermostat, all EcoSmart electric tankless water heaters have an automated reset feature. For the installer and user’s convenience, all components are integrated, and easy connections are used.
Certifications
Every EcoSmart tankless water heater complies with UL 499 and is ETL CERTIFIED. This symbol ensures a safe and dependable product and serves as evidence of conformity with North American safety requirements. Customers should check the certification of the electric tankless water heater before purchasing it to verify compliance with safety standards. An independent agency for product safety certification called Underwriters Laboratories Inc. (UL) creates standards and test methods for electrical heating appliances like tankless water heaters.
The purpose of the CSA is to create strict standards for the performance and safety of electrical and electronic equipment. Although adherence to these standards is not required, doing so is advantageous for businesses and customers and further proves that EcoSmart satisfies safety requirements.
Notable Features of EcoSmart Tankless Water Heater
- Precision Control: The capacity to raise the temperature of the water leaving the system in 1-degree increments.
- Self-Modulating Technology: The unit adjusts how much electricity it uses depending on how much hot water is needed. This enables the appliance to provide hot water while using less energy.
- Digital Temperature Display: The precise temperature of the water as it exits the water heater will be displayed on the digital temperature display.
- Compact Size: The EcoSmart Eco27 can fit into small places because of its svelte, compact design.
- Unlimited On-Demand Hot Water & Consistent: You will get unlimited hot water and never-ending hot water when you need it; Efficiency and consistency are guaranteed within one degree of the chosen temperature thanks to continuously monitor water temperature and controlled flow rates.
- Saving Space: EcoSmart tankless electric water heaters can be mounted on a wall or at the point of use, and they are 90% smaller than conventional tank heaters.
- Save Energy: Compared to tank heaters, which maintain the water at a constant temperature even when not in use, EcoSmart tankless electric water heaters only heat the water when it is necessary, making them 99% more energy-efficient thermally. The Department of Energy claims that you can reduce your water heating costs by up to 50%.
Benefits of EcoSmart Tankless Water Heater
- Installation: Although they do demand a significant amount of electricity to run, electric tankless water heaters are made to be housed indoors and do not require the pricey venting that a gas tankless indoor heater does.
- Performance: All EcoSmart electric tankless water heaters activate at .25 GPM and use Flow Sensor technology. To match the demand for hot water, the flow sensor regulates energy use.
- Easy Maintenance: Even though installation must be done by a professional, upkeep is simple enough for the average person to handle. You only need a screwdriver to maintain your EcoSmart Tankless Water Heater functionality, making repairs simple and affordable.
- Lifetime Warranty: The guarantee will only be valid if the equipment is professionally fitted soon after purchase. The EcoSmart Tankless Water Heater is covered by a lifetime warranty should any part malfunction and require repair if you take the time to double-check that everything is in working condition.
What Factors Should You Consider When Choosing an EcoSmart Tankless Water Heater?
A smart home improvement is switching from a conventional water tank to an EcoSmart tankless electric water heater. Tankless electric water heaters promise a greener, more durable, and technologically advanced water heating system while lowering water heating expenses in households by up to 50%, saving money and space.
To choose the right EcoSmart tankless water heater, you should consider the following factors.
Location
When choosing the best water heater for the job, EcoSmart considers a number of variables. A homeowner in Minnesota would be advised to order the ECO 27 for the identical application, whereas a resident in Southern Florida, where the inlet water temperature is 77 degrees, would use an ECO 11 to heat one faucet and one shower.
The rationale is that models with more power are needed to heat the water in colder climates, such as Minnesota, where the input temperature is 37 degrees. In North America, EcoSmart provides 11 variants for various tankless electric applications.
Gallons Per Minute (GPM)
Start by finding the hue of your North American region on the map and checking the sizing guide. Next, determine how many fixtures will require hot water simultaneously. This will estimate your gallons per minute (GPM) and help you choose the best water heater for bathroom. Make sure you have the necessary electrical service to support the Rinnai tankless water heater you choose by checking its electrical requirements.
Advanced Features
Even on the coldest days, EcoSmart tankless electric water heaters provide an unending supply of hot water. Rheem’s top brand EcoSmart offers the most cutting-edge, self-modulating technology on the market right now. Each unit has digital temperature controls with 1-degree increments and regulates energy use based on needs. “Set it and forget it” is that easy to do!
EcoSmart tankless electric water heaters are among the most energy-efficient and cutting-edge devices available since they are made specifically for each application, environment, and home size.
How Much Does It Cost to Install an EcoSmart Tankless Water Heater?
Tankless heater installation typically costs between $4,500 and $6,500, with an average cost of roughly $5,500. (including the water heater, warranty, and tune-ups). Without the unit, the tankless installation can be anywhere from $1800 to $3500, with an average price of around $2650. The typical pricing point for a gas-powered unit will be closer to $3,500.
Labor rates are one of the major factors. According to data from Energy Sage, an electric tankless water heater will likely cost roughly $2,500, this price covers both the equipment and the installation.
How Long Do EcoSmart Tankless Water Heaters Last?
Due to their 90% smaller size compared to tank-style heaters, EcoSmart electric tankless water heaters may be installed practically everywhere. Compared to other types of water heaters, tankless water heaters have a lifespan of over 20 years. The lifespan of tanks is 10–12 years. A limited lifetime warranty from EcoSmart ensures that you will use this product for a very long period.
Some Drawbacks of EcoSmart Tankless Water Heaters
EcoSmart tankless water heaters have a variety of advantages over traditional tank-style water heaters. What are some of the EcoSmart water heater’s drawbacks, despite the fact that it has many benefits to offer? These water heaters have the following shortcomings:
- Fuel Cost: Since electricity is typically more expensive than natural gas, the Eco 27 will cost more to run than a gas tankless water heater. Despite the fact that electric tankless heaters are more environmentally friendly, there is some trade-off involved.
- Instant Hot Water: When you open a hot water tap, the Eco 27 immediately turns on. However, there will be a delay for the hot water to reach the faucet as it travels through your home’s plumbing. This is true with all water heaters, and if having instant hot water is important to you, consider installing a small tankless unit at the source.
- Critical Size: If you want to have an unending supply of hot water, you must buy the proper size tankless. When in doubt, it’s preferable to buy a larger unit.
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Our Top Picks
We’ve narrowed down the top-performing models based on performance, features, value, and overall reliability
| Best Overall | Best for Moderate Demand | Best for Small Homes | Best Point-of-Use |
| EcoSmart ECOS 27 | EcoSmart ECOS 18 | EcoSmart ECO 11 | EcoSmart POU 4T |
| Highest capacity in this lineup, with self-modulating technology and strong performance for higher hot-water demand. | A balanced option for households needing more capacity without stepping up to the ECOS 27. | Compact and suitable for one or two applications, making it a practical choice for smaller households. | A compact, affordable option designed for one low-flow faucet or other point-of-use applications. |
| $549.00 | $411.73 | $249.00 | $166.72 |
Wrap Up
Choosing the best EcoSmart tankless water heater ultimately comes down to your household’s hot-water demand, available electrical capacity, and installation needs. The EcoSmart ECOS 27 stands out as the best overall pick because it offers the highest capacity in this lineup and is well suited to higher hot-water demand. It is a strong choice for households that need more consistent hot water. For moderate demand, the EcoSmart ECOS 18 offers a balanced combination of capacity. Meanwhile, the EcoSmart ECO 11 is a practical option for smaller homes and limited applications. If you only need hot water at a single low-flow faucet, the EcoSmart POU 4T is the most affordable choice.
Overall, these best EcoSmart tankless water heater reviews show that there is no one-size-fits-all solution. Check your water temperature, flow requirements, and electrical service before buying. Choose the model that fits your needs, and you’ll be on the right track to reliable on-demand hot water without paying for more capacity than you actually need.
FAQs
Is the EcoSmart ECOS 27 good for a large family?
Yes. The ECOS 27 is designed for homes with higher hot-water demand and can serve multiple fixtures at once. However, its actual performance depends on incoming water temperature, desired outlet temperature, and total simultaneous flow. Colder water or higher demand can reduce the available hot-water flow.
What is the best EcoSmart tankless water heater for a small home?
The EcoSmart ECO 11 is a practical choice for smaller homes and limited hot-water needs. With 13 kW of power, it can handle one or two hot-water applications efficiently, making it especially suitable for warmer climates. Its compact design also helps save valuable installation space while providing reliable on-demand hot water for daily use at home
Are EcoSmart tankless water heaters energy efficient?
Yes. They heat water only when there is demand rather than continuously maintaining a tank of hot water. Self-modulating models can also adjust power according to water flow and temperature requirements.
What is the difference between ECOS 27 and ECOS 18?
The main difference is heating capacity. The ECOS 27 provides 27 kW, while the ECOS 18 provides 18 kW. The ECOS 27 can handle greater demand but also requires substantially more electrical capacity.
Is the EcoSmart POU 4T a whole-house water heater?
No. The POU 4T is designed for point-of-use applications, particularly a single low-flow faucet. It is not intended to supply multiple showers or meet the hot-water needs of a large household. Its compact design makes it better suited for sinks, small spaces, and other individual fixtures.
Can I install an EcoSmart tankless water heater myself?
Professional installation is recommended, especially for larger models. High-powered electric heaters require properly sized circuits, breakers, wiring, and electrical service. Before installation, verify the unit’s electrical requirements and ensure your home’s system can safely handle the load. A qualified electrician can confirm compatibility and complete the work.
How long do EcoSmart tankless water heaters last?
Service life depends on installation quality, water conditions, usage, and maintenance. Following the manufacturer’s maintenance recommendations can help maintain performance and extend useful life.
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