EcoSmart 36 kW Electric Tankless Water Heater Alternatives: 6 Similar Picks Compared
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You are looking for ecosmart 36 kw electric tankless water heater alternatives because your needs may differ from the original unit. The EcoSmart ECO 36 delivers 36 kW of power with a compact white design that fits small spaces. It offers 99.8-percent energy efficiency and a digital temperature display for precise control. However, you might need a different size, a WiFi connection, or a specific brand reputation. Some homes require 300 A electrical service rather than the standard 240 V setup this model uses. Others may prefer manual dials over digital screens or need gray or black casing to match existing plumbing aesthetics. We selected 6 similar picks because their core specifications overlap with the EcoSmart unit. These alternatives all provide 36 kW of electric heating power. They share the same 240 V voltage requirement. You can compare their dimensions, weights, and added features like smart connectivity or security locks. This list helps you find a unit that matches your exact electrical capacity and spatial constraints without sacrificing heating performance.
How these models differ
Stiebel Eltron Tempra 36 Trend Tankless Water Heater
The Stiebel Eltron Tempra 36 Trend matches the 36 kW output and 240 V requirement of the EcoSmart unit. It is slightly narrower at 16.6 inches wide and shorter at 14.5 inches high, though it weighs one pound more. You gain a more robust build quality and silent operation. It lacks the digital display found on the EcoSmart model. This unit suits homes with 300 A electrical service. You should pick this if you prioritize durability and quiet performance over precise digital temperature readouts.
WINTEMP 36kW Electric Tankless Water Heater
The WINTEMP WN36 offers 36 kW power at 240 V, matching the EcoSmart’s core heating capability. It adds WiFi connectivity for remote control, which the EcoSmart does not provide. The unit is significantly wider at 21.1 inches and deeper at 13.7 inches. It also weighs nearly double at 36.1 pounds. You gain smart features and high flow rates for large homes. You give up the compact footprint of the EcoSmart. Choose this model if your electrical infrastructure supports 300 A service and you need remote management capabilities.
WINTEMP 36 kW WiFi Tankless Water Heater
The WINTEMP WM36V provides 36 kW at 240 V, similar to the EcoSmart ECO 36. It includes WiFi functionality for remote temperature adjustments. The dimensions are 13.7 inches wide and 19.4 inches high. It weighs 38 pounds, which is heavier than the EcoSmart unit. You get smart connectivity and high flow rates. You sacrifice the slim profile of the EcoSmart. This model is ideal for homes with robust electrical capacity. Select it if you require remote management and do not mind the increased weight and depth.
VEVOR 36kW Touchscreen Electric Tankless Water Heater
The VEVOR JN36 delivers 36 kW at 240 V, matching the EcoSmart’s power output. It features a touchscreen interface and a security lock. The unit is 13.7 inches wide and 5.31 inches deep. It weighs 34 pounds. You gain digital clarity and child safety features. You give up the white aesthetic and lighter weight of the EcoSmart. This model requires a 40 A breaker. Pick this unit if you value digital monitoring and security locks for commercial tasks or homes with adequate electrical support.
Rheem 36 kW Electric Tankless Water Heater
The Rheem RTEX-36 offers 36 kW at 240 V, matching the EcoSmart’s heating capacity. It weighs 24.4 pounds, which is slightly heavier than the EcoSmart. It lacks a digital display, relying on manual external temperature adjustments. You gain straightforward operation without digital complexity. You give up the precise digital output display found on the EcoSmart. This model suits users who prefer manual controls. Choose the Rheem if you want a dependable, compact electric solution without the need for smart features or digital interfaces.
MRNIU 36 kW Electric Tankless Water Heater
The MRNIU Mrniu36 provides 36 kW at 240 V, matching the EcoSmart’s power. It is designed for whole-house use. The unit is 17.1 inches wide and 18 inches high. It weighs 18.3 pounds, nearly identical to the EcoSmart. It lacks smart features and remote control options. You gain a compact, no-frills design for whole-house heating. You give up the digital display and potential smart connectivity. Select this model if you want a simple, compact electric heater. It is best for buyers who do not need advanced features or remote management.
Quick picks
Our 7 picks
EcoSmart 36 kW Electric Tankless Water Heater
Best for: High-demand households with 240V electrical capacity
- Fuel Type
- Electric
- Wattage
- 36 kW
- Voltage
- 240 V
- Dimensions
- 17 x 21 x 3.6 inches
- Weight
- 18.4 pounds
View on Amazon: EcoSmart 36 kW Electric Tankless Water Heater Affiliate link
The EcoSmart ECO 36 is a 36 kW electric tankless water heater designed for 240 V circuits. It delivers 99.8-percent energy efficiency and features a compact build measuring 17 by 21 by 3.6 inches. The unit includes a digital output temperature display and requires four 40 A breakers. This model suits households needing high flow rates while minimizing energy waste and space usage.
Pros
- 36 kW output for high hot water demand
- 99.8-percent energy efficiency rating
- Compact dimensions of 17 x 21 x 3.6 inches
- Digital output temperature display for precise control
Cons
- Requires four 40 A breakers for installation
- Heavier build at 18.4 pounds
- No WiFi or smart home connectivity listed
Good fit if
- You need high capacity hot water for multiple fixtures
- You have a dedicated 240 V electrical panel with space for multiple breakers
- You want a compact unit with precise temperature control
Skip if
- You only have standard 120 V outlets available
- You cannot install four 40 A circuit breakers
- You require WiFi remote monitoring capabilities
Verdict: EcoSmart ECO 36 36kW Electric Water Heater is a high-output solution for homes with robust electrical infrastructure. It fits buyers who prioritize energy efficiency and precise temperature management over smart connectivity features.
Stiebel Eltron Tempra 36 Trend Tankless Water Heater
Best for: homes with 300 A electrical service
- Fuel Type
- Electric
- Wattage
- 36 kW
- Voltage
- 240 V
- Temperature Control
- 68° to 140°F
- Dimensions
- 14.5 x 16.6 x 4.63 in
- Use
- Whole House
View on Amazon: Stiebel Eltron Tempra 36 Trend Tankless Water Heater Affiliate link
The Stiebel Eltron Tempra 36 Trend is a 36 kW electric tankless water heater designed for continuous hot water. It operates on 240V power and features a compact white casing measuring 14.5 x 16.6 x 4.63 inches. The unit offers precise digital temperature control from 68°F to 140°F. You will appreciate its silent operation and solid copper heating system. This model suits homes requiring reliable, high-output hot water without the need for venting.
Pros
- 36 kW output for high flow rates
- Solid copper heating system for durability
- Digital temperature display for precise control
- Compact dimensions save installation space
Cons
- Requires a minimum 300 A electric service
- Heavier at 19 pounds than many competitors
- No Wi-Fi connectivity mentioned in specifications
Good fit if
- You have a 300 A electrical panel available
- You prefer silent operation without fan noise
- You want a durable copper heating element
Skip if
- You need remote app control or Wi-Fi
- Your electrical service is below 300 A
- You are looking for a lighter unit under 15 lbs
Verdict: Stiebel Eltron Tempra 36 Trend 36kW delivers reliable heat for homes with robust electrical infrastructure. It fits buyers who prioritize build quality and silent performance over smart features.
WINTEMP 36kW Electric Tankless Water Heater
Best for: homes with 300A electrical service and WiFi needs
- Fuel Type
- Electric
- Flow Rate
- Up to 8.7 GPM
- Wattage
- 36 kW
- Voltage
- 240V
- Certification
- ETL
- Dimensions
- 21.5 x 13.7 x 5.2 inches
View on Amazon: WINTEMP 36kW Electric Tankless Water Heater Affiliate link
The WINTEMP WN36 delivers 36 kW of power at 240V, reaching a maximum flow rate of 8.7 GPM. It uses self-modulating technology to adjust output based on incoming water temperature and flow, ensuring consistent hot water. The unit includes built-in WiFi for remote temperature control via smartphone. It measures 13.7 x 21.5 x 5.2 inches and weighs 36.1 pounds. This model suits homes with three to five bathrooms in mild climates.
Pros
- 36 kW heating capacity for high flow rates up to 8.7 GPM
- Built-in WiFi allows remote temperature adjustment from a smartphone
- Self-modulating technology optimizes energy use by adjusting power to flow
- ETL certified for safety with leakage, overheat, and dry-fire protection
Cons
- Requires a 300A household electrical service and four 40A breakers
- Uses 8/2 AWG cables which may complicate installation
- 2-year replacement warranty is shorter than industry standards
Good fit if
- You have a 300A electrical service and can install four dedicated 40A circuits
- You want to control water temperature remotely via a smartphone app
- You need a compact unit for a home with three to five bathrooms
Skip if
- Your home electrical service is less than 300A
- You cannot run four separate 40A double-pole circuit breakers
- You prefer a longer warranty period than two years
Verdict: WINTEMP 36kW Electric Tankless Water Heater offers reliable WiFi control and high flow for large homes, but only if you can support its demanding electrical requirements.
WINTEMP 36 kW WiFi Tankless Water Heater
Best for: homes with high electrical capacity and smart needs
- Fuel Type
- Electric
- Flow Rate
- 8.7 GPM
- Wattage
- 36 kW
- Voltage
- 240V
- Temperature Control
- 86°F to 140°F
- Certification
- ETL
View on Amazon: WINTEMP 36 kW WiFi Tankless Water Heater Affiliate link
The WINTEMP WM36V delivers 36 kW of electric heating power at 240 volts. It provides up to 8.7 GPM of hot water, making it suitable for 3–5 points of use. The unit includes WiFi app control for remote temperature adjustments between 86°F and 140°F. It is ETL certified and weighs 38 pounds. This model fits homes needing smart features and high flow rates.
Pros
- 36 kW output provides up to 8.7 GPM
- WiFi app control for remote monitoring and settings
- ETL certified for safety and reliability
- Compact wall-mounted design saves space
Cons
- Requires four 40-amp double-pole breakers
- Needs four sets of 8 AWG wiring
- Only includes a 2-year warranty
Good fit if
- You have the electrical capacity for high-amperage circuits
- You want remote temperature control via an app
- You need hot water for multiple simultaneous outlets
Skip if
- You cannot install four 40-amp breakers
- You lack space for 8 AWG wiring runs
- You prefer a longer warranty period than two years
Verdict: The WINTEMP 36kW Electric Tankless Water Heater suits homes with robust electrical infrastructure that value smart connectivity. It is a strong option for users who need high flow rates and remote management capabilities.
VEVOR 36kW Touchscreen Electric Tankless Water Heater
Best for: Digital temperature monitoring and security lock
- Fuel Type
- Electric
- Wattage
- 36KW
- Voltage
- 240V
- Temperature Control
- 30-60°C / 86-140°F
- Dimensions
- 13.7 x 13.7 x 5.31 inches
- Weight
- 34 pounds
View on Amazon: VEVOR 36kW Touchscreen Electric Tankless Water Heater Affiliate link
The VEVOR 36kW unit delivers instant hot water for residential or light commercial use. It operates on 240V power and heats water to 140°F. The black die-cast aluminum body features an LCD touch screen for real-time temperature monitoring. A security lock prevents accidental changes. You need 40A circuit breakers and 8AWG wire for installation. This model suits those who want digital control and clear temperature readouts.
Pros
- 36kW heating capacity for rapid hot water delivery
- LCD touch screen with real-time temperature display
- Die-cast aluminum construction separates water and electricity
- Security lock prevents unauthorized temperature adjustments
Cons
- Requires 40A circuit breakers and 8AWG wiring
- Touch screen may be less durable than physical knobs
- No remote control or app connectivity listed
Good fit if
- You want precise digital temperature monitoring via LCD
- You have the electrical capacity for 40A breakers
- You prefer a black unit for commercial settings
Skip if
- You need WiFi or app-based remote control
- Your panel only supports 30A or lower circuits
- You prefer physical knobs over touch interfaces
Verdict: VEVOR 36kW Electric Tankless Water Heater fits users who value digital clarity and security locks. It delivers reliable heat for showers or commercial tasks if your electrical setup supports the 40A requirement.
Rheem 36 kW Electric Tankless Water Heater
Best for: Users wanting manual temperature control
- Fuel Type
- Electric
- Wattage
- 36kW
- Voltage
- 240V
- Temperature Control
- Ext Adj Temp Ctrl
- Dimensions
- Bot 3/4 in. Npt Con
- Weight
- 24.4 pounds
View on Amazon: Rheem 36 kW Electric Tankless Water Heater Affiliate link
The Rheem RTEX-36 is a 36 kW electric tankless water heater designed for 240V circuits. It features external adjustable temperature control, allowing you to set precise output levels. Weighing 24.4 pounds, it offers a compact silver build. This unit suits households needing reliable on-demand hot water with straightforward manual adjustments rather than digital interfaces.
Pros
- 36 kW heating capacity for consistent flow
- External adjustable temperature control for precision
- Compact 24.4-pound weight for easy mounting
- Standard 240V electric operation
Cons
- No WiFi or smart home connectivity
- Lacks digital display for real-time temperature readout
- Manual temperature adjustment only
Good fit if
- You prefer simple, reliable mechanical controls
- You need a 36 kW electric unit for 240V circuits
- You want a compact heater for tight spaces
Skip if
- You require WiFi remote control capabilities
- You need a digital temperature display
- You are installing in a 208V circuit only
Verdict: Rheem RTEX-36 36kW Electric Heater delivers solid 36 kW performance for users who value straightforward external temperature adjustments over smart features. It is an ideal fit for homes seeking a dependable, compact electric solution without digital complexity.
MRNIU 36 kW Electric Tankless Water Heater
Best for: Compact whole-house electric heating
- Fuel Type
- Electric
- Wattage
- 36,000 W
- Voltage
- 240 V
- Dimensions
- 18 x 17.1 x 17.1 inches
- Use
- Whole House
- Weight
- 18.3 pounds
View on Amazon: MRNIU 36 kW Electric Tankless Water Heater Affiliate link
The MRNIU 36 kW unit delivers 36,000 watts of power at 240 volts for whole-house hot water. Its compact dimensions of 18 x 17.1 x 17.1 inches and 18.3-pound weight allow for easy wall mounting in small spaces. The white design includes an LED display for temperature monitoring. This electric model heats water instantly on demand, making it a practical option for homes needing reliable, endless hot water without a storage tank.
Pros
- 36,000 W heating power for whole-house use
- 240 V electric operation
- Compact 18 x 17.1 x 17.1 inch footprint
- LED temperature display
Cons
- No mention of WiFi or smart connectivity
- No remote control included
- Basic LED display only
Good fit if
- You need a compact unit for small homes
- You want instant hot water without a tank
- You prefer a simple LED temperature readout
Skip if
- You require WiFi remote control
- You need smart home integration
- You want a digital display with advanced settings
Verdict: MRNIU 36 kW Electric Tankless Water Heater fits buyers who want a compact, no-frills electric heater for whole-house use. It is best for those who do not need smart features or remote control.
Specifications side by side
| Spec | EcoSmart 36 kW Electric Tankless Water Heater | Stiebel Eltron Tempra 36 Trend Tankless Water Heater | WINTEMP 36kW Electric Tankless Water Heater | WINTEMP 36 kW WiFi Tankless Water Heater | VEVOR 36kW Touchscreen Electric Tankless Water Heater | Rheem 36 kW Electric Tankless Water Heater | MRNIU 36 kW Electric Tankless Water Heater |
|---|---|---|---|---|---|---|---|
| Fuel Type | Electric | Electric | Electric | Electric | Electric | Electric | Electric |
| Flow Rate | not stated | not stated | Up to 8.7 GPM | 8.7 GPM | not stated | not stated | not stated |
| Wattage | 36 kW | 36 kW | 36 kW | 36 kW | 36KW | 36kW | 36,000 W |
| Voltage | 240 V | 240 V | 240V | 240V | 240V | 240V | 240 V |
| Temperature Control | not stated | 68° to 140°F | not stated | 86°F to 140°F | 30-60°C / 86-140°F | Ext Adj Temp Ctrl | not stated |
| Certification | not stated | not stated | ETL | ETL | not stated | not stated | not stated |
| Dimensions | 17 x 21 x 3.6 inches | 14.5 x 16.6 x 4.63 in | 21.5 x 13.7 x 5.2 inches | 19.4" x 13.7" x 4.6" | 13.7 x 13.7 x 5.31 inches | Bot 3/4 in. Npt Con | 18 x 17.1 x 17.1 inches |
| Use | not stated | Whole House | Whole House | Whole House | not stated | not stated | Whole House |
| Features | not stated | not stated | WiFi | WiFi | not stated | not stated | not stated |
| Weight | 18.4 pounds | 19 pounds | 36.1 pounds | 38 pounds | 34 pounds | 24.4 pounds | 18.3 pounds |
| Color | White | White | Gray | Gray | Black | Silver | White |
| Model | ECO 36 | 36 Trend | WN36 | WM36V | JN36 | RTEX-36 | Mrniu36 |
| Size | not stated | 36 (kW) | 36kW | not stated | 36KW | not stated | not stated |
You can compare overall kilowatt ratings and flow rates across the best electric tankless water heaters currently available.
Frequently asked questions
Can these 36 kW heaters replace my EcoSmart unit directly?
Yes, most listed models match the 36 kW output and 240 V requirement of the EcoSmart ECO 36. You must verify your home’s electrical capacity, as some units like the Stiebel Eltron Tempra 36 Trend recommend 300 A service. Physical dimensions vary, so check if the new width and height fit your existing installation space.
Which option offers WiFi control for remote monitoring?
The WINTEMP WN36 and WM36V models both include WiFi features for remote management. These gray units allow you to adjust settings from a distance, which the standard EcoSmart and Rheem models lack. Ensure your electrical infrastructure supports the high demand, as these are designed for homes with robust power capacity.
Is there a model with a digital display and lock?
The VEVOR JN36 features a touchscreen interface for clear temperature monitoring. It also includes a security lock, making it suitable for commercial tasks or homes with children. This black unit weighs 34 pounds and requires a 40 A electrical connection to operate its 36 kW heating elements effectively.
Which heater is best for whole-house use?
The MRNIU Mrniu36 is marketed specifically for compact whole-house heating. It provides 36 kW of power without smart features or remote controls. This white unit measures 17.1 inches in width and height, offering a no-frills solution for users who prioritize straightforward operation over digital connectivity.
How do the physical sizes compare to the EcoSmart?
Sizes vary significantly across these alternatives. The EcoSmart ECO 36 is 21 inches wide and 17 inches high. In contrast, the Stiebel Eltron Tempra 36 Trend is narrower at 16.6 inches wide and shorter at 14.5 inches high. The VEVOR JN36 is notably thin at only 5.31 inches long, saving space.
Do all these units require 240 V power?
Yes, every listed 36 kW electric tankless water heater operates on 240 V. This includes the EcoSmart, Stiebel Eltron, WINTEMP, VEVOR, Rheem, and MRNIU models. You must ensure your home’s electrical panel can handle the load, as these high-output units draw significant current to heat water on demand.
Which model is the lightest to install?
The EcoSmart ECO 36 is the lightest at 18.4 pounds. The MRNIU Mrniu36 is nearly as light at 18.3 pounds. Heavier options include the WINTEMP WM36V at 38 pounds and the VEVOR JN36 at 34 pounds. Consider wall mounting strength when selecting a heavier unit for your installation.