Stiebel Eltron Tempra 29 Plus Electric Tankless Water Heater Alternatives: 6 Similar Picks Compared
As an Amazon Associate we earn from qualifying purchases. Links on this page are affiliate links.
The Stiebel Eltron Tempra 29 Plus electric tankless water heater delivers high capacity with a 28.8 kW output. It requires a robust 200-amp electrical service and three dedicated 40-amp breakers. This setup supports hot water for multiple bathrooms simultaneously. You might look elsewhere if your home lacks this electrical infrastructure. The unit’s large dimensions also require significant wall space. Some buyers prefer compact models for single-fixture installations. Others seek lower power units that fit standard circuits.
This list compares 6 similar electric tankless water heaters. We selected these alternatives because their specifications overlap with the Tempra 29 Plus in key areas like voltage and fuel type. All options use 240V electric power. The selection includes smaller 8 kW units for point-of-use applications. It also features mid-range models for mild climates. Each product offers a different balance of flow rate, size, and electrical demand. You can choose based on your specific hot water needs and installation constraints.
Our top pick: Stiebel Eltron Tempra 29 Plus 28.8kW Tankless.
How these options compare to the Tempra 29 Plus
Rheem 8 kW Multi-Fixture Tankless Water Heater
The Rheem RTEX-08 offers 8 kW of power, significantly lower than the Tempra 29 Plus 28.8 kW. It measures 12.6 x 8.25 x 3.63 inches and weighs only 8 pounds. This compact size suits single-fixture installations where space is tight. You give up multi-bathroom capacity for a unit that fits easily in small closets. The Rheem model targets users who need precise temperature control for one tap rather than whole-house flow. It shares the 240V electric requirement but demands far less electrical infrastructure. Pick this if your home cannot support the Tempra’s heavy electrical load.
Ranein 8kW Electric Tankless Water Heater
The Ranein RE8K-U provides 8 kW of heating power, much less than the Tempra 29 Plus. Its dimensions are 9.06 x 9.06 x 6.7 inches. This square footprint differs from the Tempra’s rectangular shape. It weighs no data but is designed for single-sink or shower use. You trade high flow volume for a budget-friendly, compact solution. The Ranein unit fits point-of-use applications where only one fixture needs hot water. It requires 240V service like the Tempra but lacks the capacity for simultaneous use in multiple bathrooms. Choose this alternative if you prioritize cost and space over high output.
WINTEMP 13.8kW Electric Tankless Water Heater
The WINTEMP WN13 delivers 13.8 kW, roughly half the power of the Tempra 29 Plus. It measures 9.7 x 9.7 x 14.1 inches and weighs 9.85 pounds. This size is smaller than the Tempra’s 16.6 x 14.5 x 4.63 inches. It suits point-of-use applications in mild climates or as a booster. You sacrifice the ability to heat water for several bathrooms at once. The WINTEMP unit requires 240V power and strong electrical infrastructure. It is ideal for single fixtures in warm areas. Select this model if you need moderate output without the Tempra’s high electrical demands.
VEVOR 8 kW Electric Tankless Water Heater
The VEVOR JN08 provides 8 kW of power, far below the Tempra 29 Plus 28.8 kW. It is extremely compact at 9.7 x 3.3 x 14 inches and weighs 6.83 pounds. This unit fits single bathroom sink applications where space is critical. You give up high flow capacity for a digital, space-saving design. The VEVOR model requires 240V service. It is best for low-demand spots where only one tap needs hot water. The Tempra serves whole-house needs, while the VEVOR targets specific, low-flow installations. Pick this alternative if your electrical system is limited and you only need hot water for one fixture.
WINTEMP 8kW Single Fixture Tankless Water Heater
The WINTEMP YQ-WN88K offers 8 kW of heating power, significantly less than the Tempra 29 Plus. It measures 9.7 x 9.7 x 14 inches and weighs 7.9 pounds. This unit is designed for single sink hot water in small spaces. You trade multi-fixture capability for a practical, compact solution. The WINTEMP model requires 240V electrical setup. It suits users who only need hot water for hand washing or dish cleaning. The Tempra supports several bathrooms, while this unit handles one sink. Choose this alternative if you have the required electrical infrastructure and need a dedicated single-fixture heater.
Camplux 8 kW Point-of-Use Water Heater
The Camplux TEW08N provides 8 kW of power, much lower than the Tempra 29 Plus. It measures 8.5 x 8.5 x 12.2 inches and weighs 8.8 pounds. This compact design fits low-flow point-of-use installations. You sacrifice high flow capacity for a space-saving, certified safety feature. The Camplux unit requires 240V service. It is ideal for buyers who prioritize compact size and safety over heating multiple fixtures. The Tempra serves whole-house needs with 28.8 kW output. Pick this alternative if you need a safe, small heater for a single application and cannot support the Tempra’s electrical requirements.
Quick picks
Our 7 picks
Stiebel Eltron Tempra 29 Plus 28.8kW Tankless
Best for: homes with high electrical capacity
- Fuel Type
- Electric
- Wattage
- 28.8 kW
- Voltage
- 208 V, 240 V
- Dimensions
- 14.5 x 16.6 x 4.63 in
- Use
- Whole House
- Weight
- 19 pounds
View on Amazon: Stiebel Eltron Tempra 29 Plus 28.8kW Tankless Affiliate link
This unit delivers 28.8 kW of power at 240 volts, making it the strongest option on this list. It measures 14.5 by 16.6 inches and weighs 19 pounds. The device uses two temperature memory presets for easy adjustment. You need three dedicated 40-amp breakers and 8-gauge copper wiring to install it. It suits homes with high hot water demands that can support the required electrical service.
Pros
- 28.8 kW output at 240V
- Two temperature memory presets
- Compact 14.5 x 16.6 inch footprint
- No venting required
Cons
- Requires three 40-amp breakers
- Needs 8-gauge copper wiring
- 200-amp total service minimum
Good fit if
- You have a 200-amp electrical panel
- You need high flow for multiple fixtures
- You want precise temperature presets
Skip if
- You only have a 100-amp service
- You cannot install three 40-amp breakers
- You prefer plug-in installation
Verdict: Stiebel Eltron Tempra 29 Plus 28.8kW provides the highest power output among these electric options. It fits homes with robust electrical systems that need reliable hot water for several bathrooms simultaneously.
Rheem 8 kW Multi-Fixture Tankless Water Heater
Best for: single fixture installations with space constraints
- Fuel Type
- Electric
- Voltage
- 240V
- Wattage
- 8 kW
- Dimensions
- 12.6 × 8.25 × 3.63 inches
- Weight
- 8 pounds
View on Amazon: Rheem 8 kW Multi-Fixture Tankless Water Heater Affiliate link
The Rheem 8kW model delivers up to 1.95 GPM of hot water at 240V. It features digital thermostatic controls adjustable in 1-degree increments from 80°F to 140°F. The compact unit measures 12.6 by 8.25 by 3.63 inches and weighs just 8 pounds. This space-saving design suits single-fixture applications where high flow is not required.
Pros
- Provides up to 1.95 GPM flow rate
- Digital controls allow 1-degree temperature adjustments
- Compact dimensions save significant floor space
- Lightweight at only 8 pounds
- Heats water only when needed to save energy
Cons
- Lower flow rate limits use to single fixtures
- Requires a 40-amp double-pole breaker
- Needs #8 AWG copper wiring for installation
Good fit if
- You need a heater for a single sink
- You have limited space for installation
- You want precise temperature control settings
Skip if
- You need high flow for multiple fixtures
- Your electrical panel is less than 100 amps
- You cannot install a 40-amp circuit
Verdict: Rheem 8kW Electric Tankless Water Heater is a compact solution for single-fixture needs. It fits users who prioritize space savings and precise temperature settings over high flow volume.
Ranein 8kW Electric Tankless Water Heater
Best for: single sink or shower installations
- Fuel Type
- Electric
- Flow Rate
- Up to 1.9 GPM
- Wattage
- 8 kW
- Voltage
- 240 V
- Temperature Control
- 86°F to 131°F, 1°F increments
- Dimensions
- 9.06" × 6.7" × 2.34"
View on Amazon: Ranein 8kW Electric Tankless Water Heater Affiliate link
The Ranein 8kW unit delivers 1.9 GPM at 240V for single-fixture use. Its compact 9.06 x 6.7 x 2.34 inch frame fits tight spaces. You get precise temperature control from 86°F to 131°F in 1°F increments. The LED display and knob controls make adjustments simple. This model suits buyers needing a basic, space-saving solution for one sink or shower.
Pros
- 8 kW power output for instant heating
- Compact dimensions: 9.06 x 6.7 x 2.34 inches
- Precise 1°F temperature adjustment increments
- LED display shows current settings
- 99% thermal efficiency rating
Cons
- Low 1.9 GPM flow rate limits simultaneous use
- Requires a dedicated 40-amp circuit breaker
- Knob controls lack digital precision
Good fit if
- You need a heater for a single sink or shower
- You have limited installation space under a cabinet
- You want precise temperature adjustments in 1°F steps
Skip if
- You need hot water for multiple fixtures at once
- You cannot install a 40-amp electrical circuit
- You prefer a larger flow rate above 2 GPM
Verdict: Ranein 8kW Electric Tankless Heater provides reliable single-point hot water with precise temperature control. It fits buyers who prioritize compact size and exact temperature settings over high flow capacity.
WINTEMP 13.8kW Electric Tankless Water Heater
Best for: point-of-use applications in mild climates
- Fuel Type
- Electric
- Flow Rate
- Up to 3.1 GPM
- Wattage
- 13.8kW
- Voltage
- 240V
- Temperature Control
- 86°F–140°F
- Certification
- ETL
View on Amazon: WINTEMP 13.8kW Electric Tankless Water Heater Affiliate link
The WINTEMP 13.8kW unit delivers up to 3.1 GPM at 240V. Its self-modulating heating adjusts power based on real-time flow and inlet temperature. This maintains stable outlet temperatures between 86°F and 140°F. The compact 9.7 x 14.1 x 3.3-inch design fits under sinks. It suits one-shower applications in mild climates or point-of-use needs in colder regions.
Pros
- Delivers up to 3.1 GPM flow rate
- Self-modulating heating for stable temperature control
- Compact 9.7-inch width saves space
- ETL certified for safety
Cons
- Requires a 60A double-pole breaker
- Needs 6 AWG copper wiring
- Limited to one shower in warm climates
Good fit if
- You need a compact unit for point-of-use
- You have the required 60A electrical capacity
- You live in a mild climate
Skip if
- You cannot install a 60A breaker
- You need simultaneous multi-fixture hot water
- You lack 6 AWG wiring capability
Verdict: WINTEMP 13.8kW Electric Tankless Water Heater fits homes with strong electrical infrastructure needing efficient point-of-use heating. It works best for single fixtures in warm areas or as a booster.
VEVOR 8 kW Electric Tankless Water Heater
Best for: single bathroom sink applications
- Fuel Type
- Electric
- Wattage
- 8KW
- Voltage
- 240V
- Temperature Control
- 86°F-140°F or higher
- Dimensions
- 3.3"W x 14"H x 9.7"L
- Weight
- 6.83 pounds
View on Amazon: VEVOR 8 kW Electric Tankless Water Heater Affiliate link
The VEVOR 8kW unit provides instant hot water using a 240V electric system. It features an LCD touch screen for precise temperature control between 86°F and 140°F. The compact black design measures 14 inches high and weighs 6.83 pounds. This model suits single-fixture applications like a bathroom sink where high flow rates are not required.
Pros
- 8kW heating capacity for instant hot water
- LCD touch screen for digital temperature control
- Compact wall-mount design saves space
- Over-temperature protection for safety
Cons
- 8kW output limits flow to single fixtures
- Requires professional installation with 40A breaker
- No remote control or smart connectivity listed
Good fit if
- You need hot water for a single bathroom sink
- You prefer digital touch controls over dials
- You have a 240V circuit available
Skip if
- You need to run multiple fixtures simultaneously
- You want a higher flow rate for a shower
- You require a unit with smart home integration
Verdict: VEVOR 8kW Electric Tankless Water Heater is a compact, digital solution for low-demand spots. It fits perfectly in small bathrooms where only one tap needs hot water at a time.
WINTEMP 8kW Single Fixture Tankless Water Heater
Best for: single sink hot water in small spaces
- Fuel Type
- Electric
- Flow Rate
- Up to 1.9 GPM
- Wattage
- 8 kW
- Voltage
- 240V
- Certification
- ETL
- Dimensions
- 14 x 9.7 x 3.4 inches
View on Amazon: WINTEMP 8kW Single Fixture Tankless Water Heater Affiliate link
The WINTEMP 8kW unit is a compact, single-fixture electric water heater designed for point-of-use applications. It operates on 240V power and draws up to 33A, requiring a 40A breaker and 10 AWG wiring. Measuring 9.7 inches wide by 14 inches high, it fits small spaces like kitchens or utility rooms. You get instant hot water for sinks, but it is not built for whole-house heating or shower use. Digital controls let you adjust the temperature easily.
Pros
- Compact 9.7"W x 14"H design fits tight spaces
- Digital temperature control for precise heat adjustment
- Includes overheating and dry-heating protection features
- Provides instant hot water for single fixtures
Cons
- Limited to single point-of-use applications only
- Requires 40A double-pole breaker and 10 AWG wiring
- Performance drops significantly in cold climates or high flow
Good fit if
- You need hot water for a single kitchen or bathroom sink
- You have a dedicated 240V circuit with a 40A breaker
- You are installing in a small space like a garage or office
Skip if
- You need to heat water for a shower or whole house
- You only have standard 120V outlets available
- You require a unit with higher flow rates for multiple fixtures
Verdict: WINTEMP 8kW Single Fixture Electric Heater is a practical solution for heating water at a single sink. It suits you if you have the required electrical setup and only need hot water for hand washing or dish cleaning in a small area.
Camplux 8 kW Point-of-Use Water Heater
Best for: Compact, low-flow point-of-use installations
- Fuel Type
- Electric
- Flow Rate
- 1.56 GPM at 35°F rise
- Wattage
- 8kW
- Voltage
- 240 Volt
- Temperature Control
- Maximum 131°F
- Certification
- ETL
View on Amazon: Camplux 8 kW Point-of-Use Water Heater Affiliate link
The Camplux 8kW unit delivers instant hot water at 1.56 GPM with a 35°F temperature rise. It operates on 240V and draws 33.3 amps, requiring a 40A double-pole breaker. The compact 12.2 x 8.5 x 8.5 inch design mounts easily to walls. Self-modulating flow sensors adjust energy use based on demand. This model suits small households or point-of-use applications where space is limited.
Pros
- Compact 12.2 x 8.5 x 8.5 inch footprint saves space
- Self-modulating flow sensor technology adjusts energy consumption
- ETL certified for safety with overheating and leakage protection
- Unique left and right inlet/outlet design aids installation
Cons
- Lower flow rate of 1.56 GPM limits simultaneous use
- Maximum temperature capped at 131°F
- Requires a 40A double-pole breaker and 8AWG wire
Good fit if
- You need a compact unit for under-counter installation
- You require ETL certification for safety compliance
- You are heating water for a single fixture or small area
Skip if
- You need a flow rate higher than 1.56 GPM
- You require a maximum water temperature above 131°F
- Your electrical panel cannot support a 40A double-pole breaker
Verdict: Camplux 8kW Electric Tankless Water Heater offers a space-saving, safe solution for low-demand applications. It fits buyers who prioritize compact size and certified safety over high flow capacity.
Specifications side by side
| Spec | Stiebel Eltron Tempra 29 Plus 28.8kW Tankless | Rheem 8 kW Multi-Fixture Tankless Water Heater | Ranein 8kW Electric Tankless Water Heater | WINTEMP 13.8kW Electric Tankless Water Heater | VEVOR 8 kW Electric Tankless Water Heater | WINTEMP 8kW Single Fixture Tankless Water Heater | Camplux 8 kW Point-of-Use Water Heater |
|---|---|---|---|---|---|---|---|
| Fuel Type | Electric | not stated | Electric | Electric | Electric | Electric | Electric |
| Flow Rate | not stated | not stated | Up to 1.9 GPM | Up to 3.1 GPM | not stated | Up to 1.9 GPM | 1.56 GPM at 35°F rise |
| Wattage | 28.8 kW | not stated | 8 kW | 13.8kW | 8KW | 8 kW | 8kW |
| Voltage | 208 V, 240 V | not stated | 240 V | 240V | 240V | 240V | 240 Volt |
| Temperature Control | not stated | not stated | 86°F to 131°F, 1°F increments | 86°F–140°F | 86°F-140°F or higher | not stated | Maximum 131°F |
| Certification | not stated | not stated | not stated | ETL | not stated | ETL | ETL |
| Dimensions | 14.5 x 16.6 x 4.63 in | not stated | 9.06" × 6.7" × 2.34" | 14.1" x 9.7" x 3.3" | 3.3"W x 14"H x 9.7"L | 14 x 9.7 x 3.4 inches | 12.2 x 8.5 x 8.5 in |
| Use | Whole House | not stated | not stated | not stated | not stated | not stated | not stated |
| Weight | 19 pounds | 8 pounds | not stated | 9.85 pounds | 6.83 pounds | 7.9 pounds | 8.8 pounds |
| Size | 29 (kW) | not stated | not stated | 13.8kW | 8KW | WN-08 | not stated |
| Color | White | Gray | Gray | Gray | Black | Gray | White |
| Model | 239223 | RTEX-08 | RE8K-U (8kW) | WN13 | JN08 | YQ-WN8K | TEW08N |
If you also need outdoor heating, review the wattage specifications of the best electric patio heaters for your space.
Frequently asked questions
Can I install the Tempra 29 Plus in a small bathroom?
The Tempra 29 Plus is not suitable for small bathrooms due to its size. It measures 16.6 by 14.5 by 4.63 inches. This unit is designed for homes with high electrical capacity. You should choose a compact 8 kW model for limited spaces.
What is the smallest alternative to the Tempra 29 Plus?
The VEVOR 8 kW unit is the most compact option listed. It measures only 3.3 by 14 by 9.7 inches. This slim profile fits easily in tight areas. It provides 8 kW of power for single fixture use. It weighs just 6.83 pounds.
Do all these heaters require 240V power?
Yes, every listed unit operates on 240V electricity. The Stiebel Eltron Tempra 29 Plus uses 240V at 8 kW per element. Other models like the Rheem and Camplux also use 240V. You must ensure your electrical panel supports this voltage for safe operation.
Which heater is best for a single sink?
The Rheem RTEX-08 is ideal for single sink installations. It delivers 8 kW of power in a compact 12.6 by 8.25 by 3.63 inch frame. The WINTEMP 8kW Single Fixture model is another practical choice. It weighs 7.9 pounds and fits small spaces well.
How heavy is the Stiebel Eltron Tempra 29 Plus?
The Stiebel Eltron Tempra 29 Plus weighs 19 pounds. This is heavier than most alternatives on the list. For comparison, the VEVOR unit weighs only 6.83 pounds. The Rheem model weighs 8 pounds. You need a sturdy wall mount for the heavier Tempra unit.
Can I use these heaters for point-of-use applications?
Several models are designed for point-of-use installations. The Camplux 8 kW unit is a certified safe option for low-demand spots. The WINTEMP 13.8kW model works well as a booster. The VEVOR 8 kW heater is also compact for low-flow needs. These save space near the fixture.
What is the highest power output among these electric heaters?
The Stiebel Eltron Tempra 29 Plus has the highest output at 28.8 kW. All other listed units provide 8 kW or 13.8 kW. The 28.8 kW rating supports multiple bathrooms simultaneously. Other models are limited to single fixture use due to lower wattage.