Stiebel Eltron Tempra 36 Plus Tankless Water Heater Alternatives: 6 Similar Picks Compared
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The Stiebel Eltron Tempra 36 Plus tankless water heater delivers reliable electric heating without venting. It features digital temperature control and a compact design that fits in tight spaces. However, this model is discontinued, which may concern buyers seeking long-term support. Some users also find the 300-amp electrical requirement too demanding for their existing home infrastructure. Others may prefer a different fuel type or a more modern interface. You might also want a unit with remote monitoring capabilities or a different physical footprint. These factors often lead shoppers to explore other options that better match their specific installation needs.
We selected 6 alternatives because their specifications overlap significantly with the original Tempra 36 Plus. Each pick shares key traits like high wattage output or similar electrical demands. The list includes electric models from Stiebel Eltron and WINTEMP that offer comparable power. It also features gas and propane units for those willing to switch fuel sources for higher flow rates. You can compare these choices based on their exact dimensions, voltage requirements, and available features. This approach helps you find a replacement or upgrade that fits your home’s current capabilities.
Our top pick: Stiebel Eltron Tempra 36kW Electric Tankless Heater.
How these alternatives compare
Stiebel Eltron Tempra 36 Trend Electric
The Stiebel Eltron Tempra 36 Trend Electric shares the same 36 kW wattage as the original, ensuring similar heating capacity for high-demand homes. It targets the same 300 A electrical service requirement, making it a direct functional replacement for users with robust power infrastructure. The primary difference lies in aesthetics, as this model features a white finish rather than the gray color of the Tempra 36 Plus. It also lacks the specific discontinued status of the original, potentially offering better current availability. You get the same vent-free electric performance without the complexity of gas lines. This unit suits buyers who want identical power output but prefer a different exterior look for their installation space.
Stiebel Eltron Tempra 36 Trend Tankless Water Heater
The Stiebel Eltron Tempra 36 Trend Tankless Water Heater matches the original’s 36 kW electric power and 240V voltage requirements. It is designed for homes with high electrical capacity, specifically supporting the 300 A demand needed for peak performance. While the wattage is identical, the physical dimensions differ slightly, with a width of 16.6 inches compared to the original’s varied measurements. It retains the compact, vent-free design that fits easily in tight spaces. The white color provides a clean look for indoor installations. This model serves as a practical alternative for those seeking the same reliable electric heating capability but requiring a unit that is currently in production. It delivers steady hot water without the need for complex venting systems.
Rinnai 6.1 GPM Outdoor Propane Water Heater
The Rinnai 6.1 GPM Outdoor Propane Water Heater shifts from electric to propane fuel, eliminating the need for high-amperage electrical service. It is designed for outdoor installation, which frees up indoor space but requires weatherproofing considerations. This unit offers a flow rate of 6.6 GPM, providing high-volume hot water suitable for multiple fixtures simultaneously. It uses non-condensing venting, which differs from the vent-free nature of the original electric model. The silver finish and larger footprint reflect its outdoor durability. You should choose this option if you have access to propane and need greater flow capacity than electric units typically provide. It prioritizes durability and high output over the compact, indoor-friendly design of the Stiebel Eltron.
WINTEMP 36kW Electric Tankless Water Heater
The WINTEMP 36kW Electric Tankless Water Heater matches the original’s 36 kW wattage and 240V voltage, requiring similar electrical infrastructure. It adds WiFi connectivity, allowing for remote management and temperature adjustments via a smartphone app. This smart feature is absent in the original Tempra 36 Plus. The unit is slightly wider at 13.7 inches but maintains a similar gray aesthetic. It is built for homes with robust electrical systems, specifically noting the need for four breakers. You gain modern control capabilities while retaining the same high heating power. This alternative suits buyers who want vent-free electric heating but value the convenience of smart home integration and remote monitoring for their water heater system.
Rheem RTG 8.4 GPM Indoor Natural Gas Water Heater
The Rheem RTG 8.4 GPM Indoor Natural Gas Water Heater switches from electric to natural gas fuel, requiring a gas line connection instead of high-amperage electrical service. It delivers a significantly higher flow rate of 8.4 GPM, making it ideal for large families with simultaneous hot water needs. This unit is designed for indoor installation with non-condensing venting. The gray finish and larger dimensions reflect its higher capacity and gas-powered mechanism. You should select this option if you have existing natural gas infrastructure and need greater hot water volume than electric units can provide. It offers precise temperature control and reliable whole-house performance, prioritizing high flow over the compact size of the original electric model.
WINTEMP 36 kW WiFi Tankless Water Heater
The WINTEMP 36 kW WiFi Tankless Water Heater provides the same 36 kW electric power and 240V voltage as the original, requiring similar electrical support. It includes WiFi features for remote control, a capability not found in the Tempra 36 Plus. The unit is slightly narrower at 13.7 inches but taller, with a height of 19.4 inches. It maintains the gray color scheme for a consistent indoor look. This model is suited for homes with high electrical capacity that need high-volume hot water. You get the same reliable electric heating performance plus modern smart home integration. This alternative is best for users who want to retain the power output of the original while adding the convenience of app-based management and monitoring.
Quick picks
Our 7 picks
Stiebel Eltron Tempra 36kW Electric Tankless Heater
Best for: High-amperage homes needing vent-free electric heat
- Fuel Type
- Electric
- Wattage
- 36 kW
- Voltage
- 240 or 208-Volt
- Temperature Control
- Digital
- Dimensions
- 14.52" x 16.54" x 4.61"
- Weight
- 19 pounds
View on Amazon: Stiebel Eltron Tempra 36kW Electric Tankless Heater Affiliate link
The Stiebel Eltron Tempra 36 Plus is a 36kW electric tankless water heater designed for indoor installation. It requires a 240 or 208-volt connection and draws up to 150 amps, meaning you need a minimum 300-amp electric service. The unit features digital temperature control and a compact footprint measuring 14.52 by 16.54 by 4.61 inches. It saves 15-20% on hot water energy costs and requires no venting.
Pros
- 36kW heating capacity for strong hot water output
- Digital temperature control for precise settings
- No venting required for flexible installation
- Compact dimensions fit in tight spaces
Cons
- Requires a minimum 300-amp electric service
- Discontinued model with limited availability
- Draws 150 amps, demanding heavy electrical infrastructure
Good fit if
- You have a 300-amp electrical service available
- You need a vent-free electric solution
- You want precise digital temperature control
Skip if
- You only have a standard 200-amp service
- You need a propane or gas unit
- You require a currently manufactured model with warranty support
Verdict: Stiebel Eltron Tempra 36 Plus Electric Tankless Heater suits homes with robust 300-amp electrical systems that need vent-free electric heating. It delivers reliable performance for users who prioritize digital control and compact sizing over current manufacturing availability.
Stiebel Eltron Tempra 36 Trend Electric
Best for: homes with 300 A electrical service
- Fuel Type
- Electric
- Wattage
- 36 kW
- Voltage
- 240V
- Temperature Control
- 68° to 140°F
View on Amazon: Stiebel Eltron Tempra 36 Trend Electric Affiliate link
The Stiebel Eltron Tempra 36 Trend delivers 36 kW of electric power at 240 V. It heats water continuously from 68°F to 140°F without venting. The white unit uses an internal solid copper heating system for silent operation. It requires a minimum 300 A electric service. This model suits homes needing reliable, on-demand hot water with a compact, space-saving design.
Pros
- 36 kW output for high flow rates
- Solid copper heating system for durability
- Silent electronic operation with no noise
- No venting required for easy installation
Cons
- Requires a substantial 300 A electric service
- Limited to electric fuel type only
- Temperature range caps at 140°F
Good fit if
- You have a 300 A electrical panel available
- You want silent, continuous hot water
- You need a compact unit without venting
Skip if
- You cannot support a 300 A electrical load
- You prefer gas or propane heating
- You need temperatures above 140°F
Verdict: Stiebel Eltron Tempra 36 Trend Electric is a solid choice for homes with strong electrical capacity. It provides steady hot water without the complexity of venting systems.
Stiebel Eltron Tempra 36 Trend Tankless Water Heater
Best for: homes with high electrical capacity
- 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 delivers 36 kW of electric power at 240V. It measures 14.5 by 16.6 by 4.63 inches and weighs 19 pounds. The unit heats water from 68°F to 140°F using a solid copper system. You get continuous hot water without venting. This compact model suits homes with adequate electrical service for its 300-amp requirement.
Pros
- 36 kW heating capacity for high flow
- Solid copper heating system for durability
- Compact dimensions save installation space
- Silent electronic operation with digital display
- No venting required for indoor use
Cons
- Requires a minimum 300 A electric service
- Heavier at 19 pounds than smaller units
- Limited to 240V electrical connection
Good fit if
- You have a 300 A electrical service panel
- You need a compact electric heater for a whole house
- You want silent operation without venting
Skip if
- You only have a 200 A electrical service
- You prefer gas fuel over electric
- You need a unit under 15 pounds
Verdict: Stiebel Eltron Tempra 36 Trend fits homes with robust electrical infrastructure. You get reliable hot water in a small footprint if you can support the 300 A demand.
Rinnai 6.1 GPM Outdoor Propane Water Heater
Best for: outdoor propane installations requiring high flow
- Fuel Type
- Propane
- Flow Rate
- 6.1 GPM
- BTU
- 160k BTU
- Installation Location
- Outdoor
- Dimensions
- 24.6 x 14.1 x 10.8 in
- Venting Type
- Non-Condensing
View on Amazon: Rinnai 6.1 GPM Outdoor Propane Water Heater Affiliate link
The Rinnai RE160eP is a non-condensing propane unit designed for outdoor installation. It delivers 6.6 GPM of hot water, supporting up to five simultaneous fixtures. Its compact footprint measures 24.6 by 14.1 by 10.8 inches and weighs 49.2 pounds. The LED screen displays error codes and service reminders. This model suits outdoor applications where propane fuel is available and high flow rates are required.
Pros
- 6.6 GPM flow rate for multiple fixtures
- Compact outdoor design with LED status display
- 15-year limited heat exchanger warranty
- Non-condensing propane operation
Cons
- Outdoor installation only
- WiFi control module sold separately
- Labor warranty requires registration within 90 days
Good fit if
- You need an outdoor propane water heater
- You require high flow rates for multiple fixtures
- You want a compact unit for limited space
Skip if
- You need indoor installation
- You prefer natural gas fuel
- You want built-in WiFi connectivity
Verdict: Rinnai RE160eP Propane Tankless Heater fits outdoor propane setups needing high flow. It suits users who prioritize durability and compact size over built-in 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 is a 36kW electric tankless water heater designed for homes with three to five bathrooms. It delivers up to 8.7 GPM at 240V. This unit features built-in WiFi for remote temperature control via smartphone. It uses self-modulating technology to adjust power based on flow. The compact design saves space compared to traditional tanks. It includes ETL certification and multiple safety protections for reliable operation.
Pros
- 36kW heating capacity supports high flow rates
- Built-in WiFi allows remote smartphone control
- Self-modulating technology optimizes energy efficiency
- Compact wall-mounted design saves space
- ETL certified for safety and reliability
Cons
- Requires four 40A double-pole circuit breakers
- Needs 300A household electrical service
- 2-year replacement warranty is shorter than industry standard
Good fit if
- You have a 300A electrical service panel
- You want remote temperature control via WiFi
- You need a high-flow unit for multiple bathrooms
Skip if
- You have less than 300A electrical service
- You prefer gas heating over electric
- You need a longer warranty than two years
Verdict: The WINTEMP 36kW WiFi Electric Tankless Water Heater suits homes with robust electrical infrastructure seeking high flow and smart control. It fits buyers who can install the required four breakers and value remote management.
Rheem RTG 8.4 GPM Indoor Natural Gas Water Heater
Best for: large families with natural gas
- Fuel Type
- Natural Gas
- Flow Rate
- 8.4 GPM
- BTU
- 180,000 BTU/hr
- Installation Location
- Indoor
- Temperature Control
- ±1°F
- Certification
- CSA
View on Amazon: Rheem RTG 8.4 GPM Indoor Natural Gas Water Heater Affiliate link
The Rheem RTG-84DVLN delivers 8.4 GPM of hot water using natural gas. It produces 180,000 BTU/hr for whole-house use. The unit measures 24.2 x 13.5 x 10.3 inches. You get precise temperature control within ±1°F. It is designed for indoor installation with direct venting. This model suits large families needing multiple simultaneous showers.
Pros
- 8.4 GPM flow rate for 3-4 showers
- 180,000 BTU/hr high output
- ±1°F digital temperature precision
- 15-year heat exchanger warranty
Cons
- Requires professional installation
- Indoor use only
- Non-condensing efficiency
Good fit if
- You need high flow for multiple bathrooms
- You have natural gas available
- You want indoor wall-mount installation
Skip if
- You require outdoor installation
- You use propane fuel
- You need WiFi connectivity
Verdict: Rheem RTG-84DVLN 8.4 GPM Natural Gas provides reliable whole-house hot water for large homes. It fits buyers who prioritize high flow rates and precise temperature control over compact size.
WINTEMP 36 kW WiFi Tankless Water Heater
Best for: homes with high electrical capacity
- 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
This WINTEMP WM36V unit delivers 8.7 GPM of hot water at 36 kW. It features WiFi control via the Tuya Smart app, allowing remote temperature adjustments between 86°F and 140°F. The compact design measures 19.4 inches high and 13.7 inches wide. It requires four 40-amp breakers and 8 AWG wiring. This electric heater suits homes needing high flow for multiple fixtures.
Pros
- High 8.7 GPM flow rate for whole-home use
- WiFi app control for remote temperature and usage monitoring
- Compact wall-mounted design saves significant space
- ETL certified for safety and reliability
Cons
- Requires extensive electrical infrastructure with four 40-amp breakers
- Uses 8 AWG wiring which may complicate installation
- Only includes a 2-year warranty compared to industry standards
Good fit if
- You need high flow rates for multiple simultaneous fixtures
- You want remote temperature control via a smartphone app
- You have the electrical capacity for a 150-amp load
Skip if
- You cannot install four separate 40-amp double-pole breakers
- You prefer gas heating over electric models
- You need a warranty longer than two years
Verdict: WINTEMP 36kW Electric Tankless Water Heater offers strong flow and smart features but demands significant electrical work. It fits homes with robust electrical systems that need high-volume hot water.
Specifications side by side
| Spec | Stiebel Eltron Tempra 36kW Electric Tankless Heater | Stiebel Eltron Tempra 36 Trend Electric | Stiebel Eltron Tempra 36 Trend Tankless Water Heater | Rinnai 6.1 GPM Outdoor Propane Water Heater | WINTEMP 36kW Electric Tankless Water Heater | Rheem RTG 8.4 GPM Indoor Natural Gas Water Heater | WINTEMP 36 kW WiFi Tankless Water Heater |
|---|---|---|---|---|---|---|---|
| Fuel Type | Electric | Electric | Electric | Propane | Electric | Natural Gas | Electric |
| Flow Rate | not stated | not stated | not stated | 6.1 GPM | Up to 8.7 GPM | 8.4 GPM | 8.7 GPM |
| BTU | not stated | not stated | not stated | 160k BTU | not stated | 180,000 BTU/hr | not stated |
| Wattage | 36 kW | 36 kW | 36 kW | not stated | 36 kW | not stated | 36 kW |
| Installation Location | not stated | not stated | not stated | Outdoor | not stated | Indoor | not stated |
| Voltage | 240 or 208-Volt | 240V | 240 V | not stated | 240V | not stated | 240V |
| Temperature Control | Digital | 68° to 140°F | 68° to 140°F | not stated | not stated | ±1°F | 86°F to 140°F |
| Certification | not stated | not stated | not stated | not stated | ETL | CSA | ETL |
| Dimensions | 14.52" x 16.54" x 4.61" | not stated | 14.5 x 16.6 x 4.63 in | 24.6 x 14.1 x 10.8 in | 21.5 x 13.7 x 5.2 inches | 24.2 x 13.5 x 10.3 inches | 19.4" x 13.7" x 4.6" |
| Use | not stated | not stated | Whole House | not stated | Whole House | not stated | Whole House |
| Venting Type | not stated | not stated | not stated | Non-Condensing | not stated | Non-Condensing | not stated |
| Features | not stated | not stated | not stated | not stated | WiFi | not stated | WiFi |
| Weight | 19 pounds | not stated | 19 pounds | 49.2 pounds | 36.1 pounds | 46.5 pounds | 38 pounds |
| Color | Gray | White | White | Silver | Gray | Gray | Gray |
| Model | Tempra 36 Plus | Tempra 36 Trend | 36 Trend | REU-VE2125WD-US-P | WN36 | RTG-84DVLN-3 | WM36V |
| Size | not stated | not stated | 36 (kW) | 6.6 GPM | 36kW | 8.4 GPM (Standard) | not stated |
Looking beyond this list? See apec water apec tankless ro water alternatives.
Frequently asked questions
Which tankless water heater is best for homes with 300 amp electrical service?
The Stiebel Eltron Tempra 36 Plus is the top pick for these homes. It delivers 36 kW of power without requiring venting. The Stiebel Eltron Tempra 36 Trend Electric is another strong option. It also provides 36 kW of heating capacity. Both units suit robust electrical systems that need reliable, vent-free electric heat for whole-house use.
What is the best budget-friendly alternative to the Stiebel Eltron Tempra 36 Plus?
The Stiebel Eltron Tempra 36 Trend is the best budget choice. It offers the same 36 kW wattage as the discontinued model. This unit fits homes with high electrical capacity. It provides a small footprint and reliable hot water. You get steady performance in a compact design that matches the power output of the original Tempra 36 Plus.
Do any of these alternatives offer WiFi smart home integration?
Yes, the WINTEMP 36kW Electric Tankless Water Heater includes WiFi features. It allows for remote management and smart control. The WINTEMP 36 kW WiFi Tankless Water Heater also offers this capability. These models suit homes with robust electrical infrastructure. They provide high flow rates alongside the convenience of digital monitoring and adjustment from a distance.
Which option is best for outdoor propane installation?
The Rinnai 6.1 GPM Outdoor Propane Water Heater is the best premium choice. It is designed specifically for outdoor setups. This unit delivers 6.6 GPM of flow. It uses non-condensing venting and propane fuel. It suits users who prioritize durability and compact size. It provides high flow without the need for complex indoor venting systems.
What is the best natural gas alternative for large families?
The Rheem RTG 8.4 GPM Indoor Natural Gas Water Heater is the best natural gas pick. It provides 8.4 GPM of flow for whole-house use. This unit is designed for indoor installation. It suits large families needing high flow rates. It offers precise temperature control. It prioritizes performance and capacity over a compact footprint, making it ideal for high-demand households.
How do the dimensions of the Stiebel Eltron Tempra 36 Trend compare?
The Stiebel Eltron Tempra 36 Trend measures 16.6 inches wide, 14.5 inches high, and 4.63 inches long. It weighs 19 pounds. This compact size fits tight spaces well. It shares the same 36 kW power as the original. The smaller depth makes it easier to install in confined areas while maintaining high heating capacity for your home.
Is the WINTEMP 36kW suitable for homes with limited electrical capacity?
No, the WINTEMP 36kW is not suitable for limited capacity. It requires four breakers and 240V power. It is designed for homes with robust 300A electrical systems. You must have strong electrical infrastructure to support the 36 kW load. It is best for users who can handle the significant electrical work required for installation and operation.
Which unit is the most compact among the electric options?
The Stiebel Eltron Tempra 36 Trend is the most compact electric option. It measures only 4.63 inches in length. It weighs 19 pounds and fits small spaces. The WINTEMP 36kW is wider at 13.7 inches. The Stiebel Eltron Tempra 36 Plus is slightly larger. The Trend model offers the smallest footprint while delivering the same 36 kW power as the others.