Best Stiebel Eltron 240V Tankless Water Heaters in 2026: 5 Picks

Quick picks

The best fit for you

• You need high capacity for whole-house use Stiebel Eltron Tempra 29 Plus 28.8kW Tankless Its 28.8kW output handles whole-house demands with robust electrical infrastructure.
• You want balanced capacity for standard homes Stiebel Eltron Tempra 24 Tankless Water Heater The 24kW wattage provides steady flow for standard household hot water needs.
• You need precise temperature for small sinks Stiebel Eltron DHX 12-2 Trend 12kW Digital controls and 12kW power deliver precise heat in a compact footprint.
• You want steady heat for single sinks Stiebel Eltron DHX Plus 14.4kW Tankless Heater Smart controls and 14.4kW output ensure consistent temperature for point-of-use tasks.

Our 5 picks

1 Best overall

Stiebel Eltron Tempra 29 Plus 28.8kW Tankless

Best for: Whole-house hot water with high electrical capacity

Voltage

240V (what this guide is about)

Fuel Type

Electric

Wattage

28.8 kW

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

The Stiebel Eltron Tempra 29 Plus is a whole-house electric tankless water heater delivering 28.8kW at 240V. It provides continuous hot water with two temperature memory presets for easy adjustment. The unit measures 14.5 by 16.6 by 4.63 inches and weighs 19 pounds. It requires hard-wired 240V service with three dedicated 40-amp breakers. This model suits homes needing high output for multiple simultaneous uses.

Pros

• 28.8kW output at 240V for high capacity
• Two temperature memory presets for quick adjustments
• Compact dimensions of 14.5 x 16.6 x 4.63 inches
• No venting required for installation

Cons

• Requires three separate dedicated 40 amp breakers
• Needs minimum 200 amp total service
• Only offers two preset temperatures without digital display

Good fit if

• You need a whole-house unit with high kW output
• You have a 200 amp electrical service panel
• You prefer simple preset temperature controls

Skip if

• You lack space for three 40 amp breakers
• Your electrical service is below 200 amps
• You want a unit with digital temperature display

Verdict: Stiebel Eltron Tempra 29 Plus 28.8kW is a high-output whole-house heater for homes with robust electrical infrastructure. It fits buyers who prioritize capacity and simple preset controls over digital features.

2 Best budget

Stiebel Eltron DHX 12-2 Trend 12kW

Best for: small sink point-of-use installations

Voltage

240V (what this guide is about)

Fuel Type

Electric

Wattage

12 kW

Temperature Control

68 - 140 F

Dimensions

14.1 x 8 x 4.31 inches

Weight

5.5 pounds

View on Amazon: Stiebel Eltron DHX 12-2 Trend 12kW Affiliate link

This Stiebel Eltron DHX 12-2 Trend is a 12kW point-of-use water heater designed for 240V circuits. It measures 8 by 14.1 by 4.31 inches and weighs 5.5 pounds. The unit features an LCD screen, digital temperature adjustment, and selectable anti-scalding limits. It uses self-modulating technology to adjust energy use based on flow. This compact heater suits small sinks or booster applications where space is tight.

Pros

• 12kW heating capacity for point-of-use tasks
• LCD screen with digital temperature control
• Selectable anti-scalding limits at 109, 122, or 131 F
• Compact 5.5 lb build fits tight spaces

Cons

• 12kW output is lower than the Tempra 24 and Tempra 29 Plus
• Smaller capacity than the DHX 15-2 Plus
• Point-of-use design limits whole-house application

Good fit if

• You need a compact heater for a single sink
• You want digital temperature adjustment on an LCD
• You require selectable anti-scalding safety limits

Skip if

• You need whole-house hot water capacity
• You require higher than 12kW heating power
• You prefer a larger unit for higher flow rates

Verdict: Stiebel Eltron DHX 12-2 Trend 12kW is a compact, digitally controlled heater ideal for small sinks. It fits buyers who need precise temperature settings in a small footprint.

3 Best premium

Stiebel Eltron DHX Plus 14.4kW Tankless Heater

Best for: Single sink hot water needs

Voltage

240V (what this guide is about)

Fuel Type

Electric

Wattage

14.4 kW

Dimensions

14.1 x 8 x 4.31 inches

Weight

5.5 pounds

View on Amazon: Stiebel Eltron DHX Plus 14.4kW Tankless Heater Affiliate link

The Stiebel Eltron DHX 15-2 Plus is a 14.4kW point-of-use heater for 240V circuits. Its compact 14.1 x 8 x 4.31 inch frame fits tight spaces. You get a backlit display, temperature presets, and an energy calculator. The motor control valve adjusts flow to keep water hot. It suits sinks needing steady heat without large units.

Pros

• 14.4kW heating power for reliable hot water
• Compact 14.1 x 8 x 4.31 inch size
• Backlit multifunction display with presets
• Motor control valve maintains output temperature
• Built-in energy savings calculator

Cons

• Lower 14.4kW output compared to whole-house models
• Point-of-use design limits simultaneous use
• No remote control or app connectivity listed

Good fit if

• You need hot water for a single sink
• You have a 240V electrical circuit available
• You want precise temperature control features

Skip if

• You need to heat multiple fixtures at once
• You only have 120V outlets
• You require smart home integration

Verdict: Stiebel Eltron DHX 15-2 Plus 14.4kW delivers steady heat for single sinks with smart controls. You should buy it if you need compact, precise point-of-use heating on a 240V circuit.

4 Best 24 kw

Stiebel Eltron Tempra 24 Tankless Water Heater

Best for: standard whole-house hot water needs

Voltage

240V (what this guide is about)

Fuel Type

Electric

Wattage

24 kW

Dimensions

14.5 x 4.61 x 16.5 in

Use

Whole House

Weight

16.1 pounds

View on Amazon: Stiebel Eltron Tempra 24 Tankless Water Heater Affiliate link

The Stiebel Eltron Tempra 24 is a 24kW electric tankless water heater designed for whole-house use on 240V circuits. It measures 14.5 inches high and 16.5 inches long, with a slim 4.61-inch depth. This unit provides reliable performance without requiring venting. Its compact footprint allows installation in various locations. It suits households seeking a dedicated electric solution for consistent hot water supply.

Pros

• 24kW heating capacity for whole-house demand
• Compact 4.61-inch depth fits tight spaces
• No venting required for installation
• Simple plumbing system design

Cons

• Lower 24kW output compared to the Tempra 29 Plus
• 16.1-pound weight adds structural load
• Limited to 240V electrical systems only

Good fit if

• You need a whole-house unit for 240V wiring
• You want a compact unit that requires no venting
• You prefer a simple design with reliable performance

Skip if

• You require higher flow rates than 24kW provides
• You only have 120V electrical circuits available
• You need a point-of-use heater for a single sink

Verdict: Stiebel Eltron Tempra 24 Whole House Heater offers balanced capacity for standard homes with 240V power. It fits buyers who prioritize compact size and vent-free installation over maximum flow speed.

5 Also great

Stiebel Eltron Classic Single Sink Point-of-Use Heater

Best for: Single sink hot water needs

Voltage

240V (what this guide is about)

Fuel Type

Electric

Installation Location

Point-of-Use

Dimensions

7.93 x 14.2 x 14.2 inches

View on Amazon: Stiebel Eltron Classic Single Sink Point-of-Use Heater Affiliate link

The Stiebel Eltron DHC 3-2 is a 240V electric point-of-use water heater designed for single sinks. It features a compact housing measuring 7.93 by 14.2 by 14.2 inches. The unit uses a copper heating system and hydraulically controlled flow for quiet operation. It offers instant hot water with up to 50% less power consumption than storage heaters. This model suits small spaces where whole-house capacity is unnecessary.

Pros

• 240V electric power for instant hot water
• Compact dimensions of 7.93 x 14.2 x 14.2 inches
• Hydraulically controlled operation for quiet performance
• Resettable safety high limit switch

Cons

• Low 3kW capacity limits flow rate
• Point-of-Use designation restricts usage to single sinks
• No digital temperature display listed in specifications

Good fit if

• You need hot water for a single sink only
• You have limited space under a vanity or counter
• You want a reliable copper heating system

Skip if

• You need to supply hot water to multiple fixtures
• You require high flow rates for showers
• You need a whole-house heating solution

Verdict: Stiebel Eltron DHC 3-2 Point-of-Use Heater is a compact, quiet option for single sinks. It fits perfectly in small bathrooms or kitchens where space is tight and only one faucet needs heating.

Specifications side by side

How to choose the right one

1. Check electrical capacity

   Verify your home’s electrical panel can handle the heater’s wattage before buying. The Tempra 29 Plus requires 28.8 kW, which demands a robust electrical infrastructure. Smaller units like the DHX 12-2 Trend use only 12 kW, making them easier to install in homes with limited power capacity. Ensure your circuits can support the specific wattage to avoid tripping breakers or damaging the unit. Match the heater’s power needs to your panel’s available amperage for safe operation.

2. Define hot water needs

   Decide if you need whole-house coverage or a single sink solution. The Tempra 24 offers balanced 24 kW capacity for standard household hot water needs. If you only need heat for one faucet, consider the DHX 15-2 Plus or the Classic DHC 3-2. These point-of-use models are designed for single sinks. Choosing the right scope prevents overspending on unnecessary capacity or underperforming on larger demands. Align the unit’s intended use with your actual household hot water patterns.

3. Measure installation space

   Check the physical dimensions of the unit against your available wall space. The Tempra 29 Plus is larger, measuring 16.6 inches wide and 14.5 inches high. In contrast, the DHX 12-2 Trend is much more compact at 8 inches wide and 14.1 inches high. The Classic DHC 3-2 is also small, fitting tight spots like under sinks. Measure your installation area carefully to ensure the heater fits without blocking access. Compact models are ideal for small bathrooms or kitchens where space is limited.

4. Verify voltage compatibility

   All listed Stiebel Eltron models operate on 240V power. Confirm your home has the correct 240V circuit available for installation. This voltage is standard for tankless water heaters but requires specific wiring. Do not attempt to install these units on standard 120V outlets. Ensure your electrical setup matches the 240V requirement for all models in this guide. Proper voltage compatibility ensures the heater functions correctly and maintains its warranty. Consult an electrician if you are unsure about your home’s electrical configuration.

5. Consider control features

   Choose between simple preset controls and digital temperature settings based on your preference. The Tempra 29 Plus uses simple presets, which are straightforward for basic operation. The DHX 12-2 Trend and DHX 15-2 Plus offer digital controls for precise temperature adjustments. If you need exact water temperatures for specific tasks, digital models are better. Simple controls are sufficient for general use where precise settings are not critical. Select the control type that matches your comfort and usage habits.

Frequently asked questions

See also

• best stiebel eltron 36 kW tankless water heaters
• stiebel eltron vs EcoSmart tankless water heater
• best 240V tankless water heaters
• best 240V patio heaters