6 Best Alternatives to the Ecosmart US EcoSmart ECOS 27 Tankless (2026)
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The EcoSmart ECOS 27 delivers consistent 27 kW output and precise temperature control within 1 degree for single-point applications. If you are researching ecosmart us ecosmart ecos 27 tankless alternatives, you may need a different flow rate, size, or feature set for your specific home. This unit excels in tight spaces with its compact 19 x 4.25 x 9.25 inch profile and 96% thermal efficiency. It suits users who prioritize energy savings and reliable performance for bathrooms or small sinks over high-volume whole-house output.
The 6 alternatives listed here were chosen because their specifications overlap with the original 27 kW electric model. You might want a higher flow rate for multiple bathrooms, digital controls for easier monitoring, or a different footprint for your installation space. Each option shares the same 240V voltage requirement and electric fuel type, ensuring compatibility with your existing electrical infrastructure. These units offer varying dimensions and additional features like WiFi connectivity or touch screens. This guide helps you compare these specs to find the best fit for your hot water needs.
Our top pick: EcoSmart 27 kW Electric Tankless Water Heater.
How these alternatives differ
SIVUATEK 27kW Electric Tankless Water Heater
The SIVUATEK TSB-270 matches the EcoSmart ECOS 27 at 27 kW and 240V, but targets whole-house use rather than point-of-use. Its gray casing measures 17.3 by 12.2 inches, offering a slightly different footprint than the EcoSmart’s 19-inch height. This model prioritizes precise temperature control in tight spaces. You get the same power output for simultaneous fixtures, but the design shifts toward broader coverage. It suits homes with strong electrical infrastructure that value space efficiency and consistent heat over the EcoSmart’s specific low-flow optimization. If you need more than one bathroom, this is a practical step up.
NOVIEEX 27kW 7.4 GPM Electric Tankless Water Heater
The NOVIEEX DS-18 delivers 27 kW at 240V but emphasizes high flow rates up to 7.4 GPM for whole-house applications. Its silver unit stands 15.9 inches tall and 14.1 inches wide, providing a slim profile for indoor installation. This model fits homes needing robust electrical setups to support multiple bathrooms simultaneously. It gives up the EcoSmart’s compact point-of-use design for higher volume output. You gain significant flow capacity but require more wall space and stronger wiring. It is ideal if your primary goal is simultaneous hot water for several fixtures rather than a single sink or shower.
WINTEMP 27kW Electric Tankless Water Heater
The Wintemp WM27V offers 27 kW and 240V power with added WiFi capabilities for smart home integration. Its gray body measures 15.9 inches high and 13 inches wide, weighing 21.5 pounds. This model provides verified safety standards and digital management for users with robust electrical capacity. It differs from the EcoSmart by focusing on remote control and high flow rates rather than minimal footprint. You trade the EcoSmart’s simplicity for app-based monitoring and smart features. It is best for users who prioritize digital oversight and modern connectivity over the straightforward, self-modulating operation of the EcoSmart unit.
VEVOR 27 kW Electric Water Heater with Touch Screen
The VEVOR JN27 features a 27 kW output at 240V with a black touch screen interface. It measures 10.9 inches wide and 3.94 inches high, making it notably thinner than the EcoSmart ECOS 27. This model suits whole-house hot water needs with precise digital controls. It requires handling a 120A electrical demand, which is substantial for residential panels. You gain a sleek, low-profile design and easy-to-read digital feedback. However, you must ensure your electrical system can support the high amperage. It is a solid choice for users wanting modern interface controls and a slim installation profile over traditional tankless designs.
Garvee 27 kW Electric Tankless Water Heater
The Garvee PTH_33HB3MVR provides 27 kW at 240V with a stainless steel build and digital controls. Its black casing is 11.4 inches wide and 3.54 inches high, weighing 17.9 pounds. This model is designed for large households needing reliable, simultaneous hot water. It offers digital control precision similar to other modern units but lacks the specific point-of-use optimization of the EcoSmart. You get a durable build and whole-house capacity. It is best for users who prioritize simultaneous multi-fixture use and digital management over the compact, single-point efficiency of the EcoSmart ECOS 27.
Camplux 27 kW Digital Electric Tankless Water Heater
The Camplux TEW27 delivers 27 kW at 240V with a clear digital display for visible temperature settings. Its white unit measures 17.1 inches high and 13.1 inches wide, weighing 20.3 pounds. This model provides reliable whole-house heating with a focus on user feedback. It differs from the EcoSmart by emphasizing visible interface controls over self-modulating technology. You gain immediate visual confirmation of settings, which aids in precise adjustments. It suits homes with adequate 240V wiring and users who value transparent temperature readouts. It is a practical alternative for those wanting clear digital feedback rather than the EcoSmart’s internal monitoring system.
Quick picks
Our 7 picks
EcoSmart 27 kW Electric Tankless Water Heater
Best for: single bathrooms and low-flow point-of-use needs
- Fuel Type
- Electric
- Flow Rate
- 2.7 to 6.6 GPM
- Wattage
- 27 kW
- Voltage
- 240 V
- Temperature Control
- within 1 degree
- Dimensions
- 19 x 4.25 x 9.25 inches
View on Amazon: EcoSmart 27 kW Electric Tankless Water Heater Affiliate link
The EcoSmart ECOS 27 is a 27 kW, 240-volt electric tankless water heater designed for point-of-use or low-flow applications. It delivers between 2.7 and 6.6 gallons per minute, depending on inlet water temperature. The unit maintains water temperature within 1 degree of your selection using self-modulating technology. Its compact dimensions of 19 x 4.25 x 9.25 inches allow for wall mounting, saving space compared to traditional tank heaters. It is ideal for bathrooms, small sinks, or office breakrooms.
Pros
- 96% thermal energy efficiency reduces standby energy loss
- Self-modulating technology keeps temperature within 1 degree
- Compact 19 x 4.25 x 9.25 inch footprint saves space
- Provides 2.7 to 6.6 GPM for low-flow needs
Cons
- Limited to 240V electrical supply
- Flow rate drops significantly with cold inlet water
- Only 1 year limited parts warranty
Good fit if
- You need hot water for a single bathroom or small sink
- You have a 240V electrical circuit available for installation
- You want a compact unit for point-of-use mounting
Skip if
- You require whole-house hot water for multiple simultaneous showers
- You only have a 120V electrical outlet available
- You need higher flow rates regardless of inlet temperature
Verdict: EcoSmart ECOS 27 27kW Electric Heater is a space-saving, efficient option for single-point applications like bathrooms or small sinks where 240V power is available. It suits users who prioritize consistent temperature control and energy savings over high-volume whole-house output.
SIVUATEK 27kW Electric Tankless Water Heater
Best for: Precise temperature control in tight spaces
- Fuel Type
- Electric
- Wattage
- 27 kW
- Voltage
- 240 V
- Temperature Control
- 86°F–131°F, ±1°F
- Certification
- ETL
- Dimensions
- 15.87" x 11.14" x 2.87"
View on Amazon: SIVUATEK 27kW Electric Tankless Water Heater Affiliate link
The SIVUATEK 27kW unit delivers instant hot water for whole-house use at 240V. It features 99.8% thermal efficiency and an LED display for precise temperature control in 1°F increments. The gray unit measures 15.87 x 11.14 x 2.87 inches. It suits households needing steady flow for multiple bathrooms and kitchens without standby energy loss.
Pros
- 27kW heating power supports 4–5 simultaneous usage points
- 99.8% thermal efficiency eliminates standby energy loss
- LED display allows 1°F precise temperature adjustments
- Compact dimensions fit under-sink or wall mounting
Cons
- Requires three 40-amp circuit breakers for installation
- No Wi-Fi or smart app connectivity listed
- Temperature range caps at 131°F
Good fit if
- You need a compact unit for tight spaces
- You want precise temperature settings without guessing
- You have the electrical capacity for three 40-amp breakers
Skip if
- You require smart home integration or remote control
- You cannot install three dedicated 40-amp circuits
- You need water temperatures above 131°F
Verdict: SIVUATEK 27kW Electric Tankless Water Heater is a solid choice for homes with strong electrical infrastructure that prioritize precise temperature control and space efficiency over smart features.
NOVIEEX 27kW 7.4 GPM Electric Tankless Water Heater
Best for: whole-house hot water with high flow needs
- Fuel Type
- Electric
- Flow Rate
- 7.4 GPM
- Wattage
- 27kW
- Installation Location
- Indoor
- Voltage
- 240V
- Temperature Control
- 77°F to 140°F, 1°F increments
View on Amazon: NOVIEEX 27kW 7.4 GPM Electric Tankless Water Heater Affiliate link
The NOVIEEX 27kW unit delivers up to 7.4 GPM at 240V, making it a whole-house solution for 3 to 4 simultaneous outlets. Its 15.9-inch height and slim 3.18-inch depth fit narrow indoor closets. You get precise temperature control in 1°F increments from 77°F to 140°F. This electric model offers 99.8% efficiency and includes an LED display for easy monitoring.
Pros
- High flow rate of 7.4 GPM supports 3-4 fixtures
- Slim 3.18-inch depth saves space in tight closets
- Precise 1°F temperature increments on LED display
- 99.8% energy conversion efficiency
Cons
- Requires 3 separate 40A circuit breakers and 8 AWG wiring
- No WiFi or smart app connectivity mentioned
- Standard 1-year warranty period
Good fit if
- You need high flow for multiple simultaneous showers
- You have the electrical capacity for three 40A circuits
- You want precise temperature control in a compact indoor unit
Skip if
- You only have a single 40A circuit available
- You require smart home integration or remote control
- You are looking for a unit with a longer warranty
Verdict: The NOVIEEX 27kW Electric Tankless Heater fits homes with robust electrical setups needing high flow for multiple bathrooms. Its slim profile and precise controls make it a strong indoor option for whole-house hot water.
WINTEMP 27kW Electric Tankless Water Heater
Best for: Smart homes with strong electrical capacity
- Fuel Type
- Electric
- Flow Rate
- 6.5 GPM
- Wattage
- 27kW
- Voltage
- 240V
- Temperature Control
- 86°F to 140°F
- Certification
- ETL
View on Amazon: WINTEMP 27kW Electric Tankless Water Heater Affiliate link
This Wintemp unit delivers 27 kW of power at 240 volts, supporting up to 6.5 GPM for whole-house use. It features smart WiFi control via the Tuya app, allowing remote temperature adjustments between 86°F and 140°F. The compact design measures 15.9 x 13 x 4.2 inches. You get ETL certification and a 2-year limited warranty. It suits homes needing precise digital management and stable hot water flow.
Pros
- 27 kW output supports up to 6.5 GPM
- WiFi app control for remote temperature settings
- ETL certified for safety and reliability
- Compact dimensions save wall space
Cons
- Requires 3 sets of 8 AWG wiring
- Needs 3 x 40 Amp double-pole breakers
- 2-year limited warranty is shorter than industry standard
Good fit if
- You want remote temperature control via smartphone
- You have a 200 Amp household service
- You need ETL certification for peace of mind
Skip if
- You cannot install heavy-duty 8 AWG wiring
- You lack space for three separate breakers
- You prefer a longer warranty period
Verdict: Wintemp 27kW Electric WiFi Heater offers smart app control and high flow rates for homes with robust electrical infrastructure. It is ideal for users who prioritize digital management and verified safety standards over extended warranty coverage.
VEVOR 27 kW Electric Water Heater with Touch Screen
Best for: Whole-house hot water with digital controls
- Fuel Type
- Electric
- Wattage
- 27 kW
- Voltage
- 240 V
- Temperature Control
- 86°F - 140°F
- Dimensions
- 4 x 11 x 11 in
- Weight
- 13.6 pounds
View on Amazon: VEVOR 27 kW Electric Water Heater with Touch Screen Affiliate link
This VEVOR unit delivers 27 kW of power at 240 volts, providing hot water up to 140°F within seconds. It features an LCD touch screen for real-time temperature monitoring and includes a security lock to prevent accidental changes. The die-cast aluminum heating element separates water and electricity to reduce scale buildup. Weighing 13.6 pounds, it fits in compact spaces. You should consider this if you need a whole-house solution with digital controls.
Pros
- 27 kW heating power at 240V
- LCD touch screen with real-time monitoring
- Security lock for safety
- Die-cast aluminum heating element
Cons
- Requires 3x40A circuit breakers and 8AWG wire
- No remote control included in data
- Limited to 240V input
Good fit if
- You want digital temperature control
- You have the required electrical capacity
- You need a compact 27kW unit
Skip if
- You only have 200A electrical service
- You prefer analog dials over screens
- You need a 208V compatible model
Verdict: VEVOR 27kW Electric Tankless Water Heater suits users who want precise digital control and safety features. It is a solid choice for whole-house hot water if your electrical panel can handle the 120A demand.
Garvee 27 kW Electric Tankless Water Heater
Best for: Whole-house hot water with digital control
- Fuel Type
- Electric
- Wattage
- 27kW
- Installation Location
- Indoor
- Voltage
- 240V
- Features
- Digital Display
- Dimensions
- 11.4 × 11.4 × 3.54 inches
View on Amazon: Garvee 27 kW Electric Tankless Water Heater Affiliate link
The Garvee 27kW electric tankless water heater delivers continuous hot water for whole-house use. It operates on 240V power and features a stainless steel enclosure for durability. The unit includes a digital display for precise temperature control and a self-modulating system to adjust power based on flow. Its compact wall-mounted design saves space. This model suits large homes needing simultaneous hot water access without temperature drops.
Pros
- 27kW high power output for whole-house supply
- Stainless steel enclosure for corrosion resistance
- Digital temperature display with self-modulating system
- Compact wall-mounted design saves floor space
Cons
- No WiFi connectivity mentioned in specifications
- Black color may not match all decor styles
- Weight of 17.9 pounds requires sturdy mounting
Good fit if
- You need hot water for multiple simultaneous uses
- You want a durable stainless steel enclosure
- You prefer precise digital temperature control
Skip if
- You require smart home integration or WiFi
- You have limited space for wall mounting
- You prefer a lighter unit under 15 pounds
Verdict: The Garvee 27kW Electric Tankless Water Heater fits large households needing reliable, simultaneous hot water. Its stainless steel build and digital controls make it a solid choice for whole-house applications.
Camplux 27 kW Digital Electric Tankless Water Heater
Best for: Users wanting digital temperature feedback
- Fuel Type
- Electric
- Wattage
- 27kW
- Voltage
- 240V
- Temperature Control
- 80°F to 140°F
- Certification
- ETL
- Dimensions
- 17.12 x 13.12 x 3.12 inches
View on Amazon: Camplux 27 kW Digital Electric Tankless Water Heater Affiliate link
The Camplux TEW27 delivers 27 kW of power at 240 volts for whole-house hot water. It features a digital display and self-modulating technology to maintain temperatures between 80°F and 140°F. The unit measures 17.1 by 13.1 by 3.12 inches and weighs 20.3 pounds. It includes ETL certification and water-electricity separation for safety. This model suits users who want precise temperature control without waiting for storage tanks to refill.
Pros
- 27 kW output at 240 volts
- Digital display shows current temperature
- Self-modulating technology for efficiency
- ETL certified safety standards
- Water-electricity separation protection
Cons
- Requires 3 x 8AWG wiring
- Minimum activation flow is 0.66 GPM
- No remote control listed in specs
Good fit if
- You need a digital temperature readout
- You have 240V electrical capacity
- You want ETL certified safety
Skip if
- You only have 120V outlets
- You require remote app control
- Your flow rate is below 0.66 GPM
Verdict: Camplux 27kW 240V Electric Tankless provides reliable whole-house heating with a clear digital interface. It fits homes with adequate 240V wiring and users who value visible temperature settings.
Specifications side by side
| Spec | EcoSmart 27 kW Electric Tankless Water Heater | SIVUATEK 27kW Electric Tankless Water Heater | NOVIEEX 27kW 7.4 GPM Electric Tankless Water Heater | WINTEMP 27kW Electric Tankless Water Heater | VEVOR 27 kW Electric Water Heater with Touch Screen | Garvee 27 kW Electric Tankless Water Heater | Camplux 27 kW Digital Electric Tankless Water Heater |
|---|---|---|---|---|---|---|---|
| Fuel Type | Electric | Electric | Electric | Electric | Electric | Electric | Electric |
| Flow Rate | 2.7 to 6.6 GPM | not stated | 7.4 GPM | 6.5 GPM | not stated | not stated | not stated |
| Wattage | 27 kW | 27 kW | 27kW | 27kW | 27 kW | 27kW | 27kW |
| Installation Location | not stated | not stated | Indoor | not stated | not stated | Indoor | not stated |
| Voltage | 240 V | 240 V | 240V | 240V | 240 V | 240V | 240V |
| Temperature Control | within 1 degree | 86°F–131°F, ±1°F | 77°F to 140°F, 1°F increments | 86°F to 140°F | 86°F - 140°F | not stated | 80°F to 140°F |
| Certification | not stated | ETL | not stated | ETL | not stated | not stated | ETL |
| Dimensions | 19 x 4.25 x 9.25 inches | 15.87" x 11.14" x 2.87" | 15.86" H x 14.13" W x 3.18" D | 15.9" H × 13" W × 4.2" D | 4 x 11 x 11 in | not stated | 17.12 x 13.12 x 3.12 inches |
| Use | not stated | Whole House | Whole House | Whole House | not stated | not stated | Whole House |
| Features | not stated | not stated | not stated | WiFi | not stated | Digital Display | Digital Display |
| Weight | 10.9 pounds | not stated | not stated | 21.5 pounds | 13.6 pounds | 17.9 pounds | 20.3 pounds |
| Color | White | Gray | Silver | Gray | Black | Black | White |
| Model | ECOS 27 | TSB-270 | DS-18 | WM27V | JN27 | PTH_33HB3MVR | TEW27 |
| Size | not stated | not stated | not stated | 27 (kW) | 27KW | 27KW | 240V/27kW |
If you need a workspace monitor, you can compare samsung 27 alternatives by panel specifications and refresh rate.
Frequently asked questions
Can these 27 kW tankless heaters replace the EcoSmart ECOS 27 for whole-house use?
Yes, several models support whole-house applications. The SIVUATEK TSB-270 and NOVIEEX DS-18 both offer 27 kW output at 240V. These units are designed to handle higher flow demands than the EcoSmart ECOS 27. They suit homes with robust electrical infrastructure. Check your panel capacity before installation.
What is the size difference between the EcoSmart ECOS 27 and the SIVUATEK TSB-270?
The EcoSmart ECOS 27 measures 19 inches in height and 9.25 inches in width. The SIVUATEK TSB-270 is shorter at 17.3 inches high and wider at 12.2 inches. Both units share the same 27 kW power rating. The SIVUATEK model has a gray casing. These dimensions affect mounting space requirements.
Which alternative offers smart home integration for remote control?
The WINTEMP WM27V includes WiFi connectivity for digital management. This feature allows you to adjust settings remotely. Other models like the VEVOR JN27 and Garvee PTH_33HB3MVR focus on local digital controls. The WINTEMP unit is ideal if you prioritize app-based management over extended warranty coverage.
Do these electric tankless heaters require a 240V electrical connection?
All listed alternatives operate on 240V power. This includes the SIVUATEK, NOVIEEX, WINTEMP, VEVOR, Garvee, and Camplux models. Each unit delivers 27 kW of heating power. You must ensure your home has adequate 240V wiring. This voltage requirement is standard for this power class.
Which model is best for users who want a digital display?
The Camplux TEW27 features a clear digital interface for visible temperature settings. The VEVOR JN27 and Garvee PTH_33HB3MVR also include touch screens or digital controls. These units provide precise feedback on water temperature. This is useful for users who value real-time monitoring during use.
How does the weight of the VEVOR JN27 compare to the EcoSmart ECOS 27?
The VEVOR JN27 weighs 13.6 pounds. The EcoSmart ECOS 27 weighs 10.9 pounds. The VEVOR unit is slightly heavier despite its compact 3.94-inch height. Both units are electric tankless heaters. The weight difference may affect mounting bracket selection. Check your wall support capacity.
Is the NOVIEEX DS-18 suitable for indoor installation?
Yes, the NOVIEEX DS-18 is designed for indoor use. It offers 27 kW output at 240V. The unit has a slim profile measuring 15.9 inches in height. It targets whole-house hot water needs. Ensure your indoor location has proper ventilation and electrical access for safe operation.
What is the flow rate advantage of the NOVIEEX DS-18 over the EcoSmart ECOS 27?
The NOVIEEX DS-18 is rated for 7.4 GPM. The EcoSmart ECOS 27 is better suited for low-flow point-of-use needs. The NOVIEEX model supports simultaneous use in multiple bathrooms. This higher flow rate makes it a strong option for whole-house applications with high demand.