4 Best Westinghouse 11 kW Tankless Water Heaters, Compared

Quick picks

The best fit for you

• You want the best overall single-point shower unit Westinghouse 11 kW Smart Wi-Fi Tankless Water Heater It offers smart Wi-Fi controls and reliable instant hot water for your sink or shower.
• You need the most compact model for tight spaces Westinghouse 11kW Wi-Fi Tankless Water Heater This unit is the thinnest at 3.58 inches high and includes Wi-Fi for remote temperature control.
• You want smart app control for precise temperature Westinghouse 11kW Smart Wi-Fi Tankless Water Heater This model features Wi-Fi connectivity and app control to manage heating for a single point of use.
• You prefer straightforward installation without smart features Westinghouse 11kW 240V Electric Tankless Water Heater It provides reliable 11 kW heating for a bathroom or kitchen sink without requiring Wi-Fi integration.

Our 4 picks

1 Best overall

Westinghouse 11 kW Smart Wi-Fi Tankless Water Heater

Best for: Single-point shower or sink use

Wattage

11 kW (what this guide is about)

Fuel Type

Electric

Flow Rate

2.6 GPM

Voltage

240V

Temperature Control

86-140°F

Certification

ETL

View on Amazon: Westinghouse 11 kW Smart Wi-Fi Tankless Water Heater Affiliate link

This Westinghouse 11kW electric tankless water heater delivers 2.6 GPM at 240V. It heats water in 3 seconds with 98% thermal efficiency. WiFi and voice control let you adjust settings remotely. The ETL-certified unit features 4-layer safety protection and an IPX4 rating. Its compact design saves space. It suits single-point use like showers or sinks in homes and cabins.

Pros

• 11 kW output provides 2.6 GPM flow rate
• WiFi connectivity with Alexa and Google Home support
• ETL certified with 4-layer safety protection
• IPX4 rating allows bathroom installation
• Temperature memory restores last setting after power outage

Cons

• Requires a dedicated 60A double-pole breaker
• Needs 8 AWG wire for installation
• Minimum start-up flow rate of 0.53 GPM

Good fit if

• You need instant hot water for a single point
• You want voice control for temperature adjustments
• You have the electrical capacity for a 60A breaker

Skip if

• You require a higher flow rate for multiple fixtures
• You cannot install a dedicated 60A circuit
• You prefer a unit without WiFi connectivity

Verdict: Westinghouse 11kW WiFi Electric Heater offers reliable instant hot water with smart controls. It fits single-point applications where electrical infrastructure supports its 60A requirement.

2 Also great

Westinghouse 11kW Wi-Fi Tankless Water Heater

Best for: Single-point hot water with smart control

Wattage

11 kW (what this guide is about)

Fuel Type

Electric

Flow Rate

2.6 GPM

Voltage

240V

Temperature Control

86–140°F, 1°F increments

Certification

ETL

View on Amazon: Westinghouse 11kW Wi-Fi Tankless Water Heater Affiliate link

This Westinghouse 11 kW unit delivers instant hot water for single-point use at 240V. It heats 50% faster with copper elements, reaching 2.6 GPM at warmer inlet temperatures. You get precise control via an LED display and Wi-Fi app, compatible with Alexa and Google Home. Its compact 12.8-inch frame fits tight spaces like under sinks. It includes ETL certification and a scale inhibitor for safe, efficient operation.

Pros

• Wi-Fi app control with Alexa and Google Home compatibility
• Compact 12.8 x 3.58 x 8.9 inch design for tight spaces
• ETL certified with overheat, dry-fire, and leak protection
• Precise temperature adjustment in 1°F increments from 86–140°F

Cons

• Limited to single-point use, not whole-house supply
• Flow rate drops to 1.4 GPM in cold inlet water
• Requires professional installation and verified panel capacity

Good fit if

• You need hot water for a single sink or shower
• You want remote temperature adjustments via a smartphone app
• You have limited space under a sink or in a closet

Skip if

• You require hot water for multiple fixtures simultaneously
• You cannot install a dedicated 240V electrical circuit
• You prefer manual knobs over digital app control

Verdict: Westinghouse 11kW WiFi Tankless Heater is a compact, smart solution for single-point hot water needs. It fits buyers who value remote control and precise temperature settings in tight spaces.

3 Best budget

Westinghouse 11kW Smart Wi-Fi Tankless Water Heater

Best for: single-point hot water with smart control

Wattage

11 kW (what this guide is about)

Fuel Type

Electric

Flow Rate

2.56 GPM

Voltage

240V

Temperature Control

86°F to 140°F, ±1°F

Certification

ETL

View on Amazon: Westinghouse 11kW Smart Wi-Fi Tankless Water Heater Affiliate link

This Westinghouse 11 kW unit delivers up to 2.56 GPM at 240V. It fits one point of use, such as a single shower. The device includes Wi-Fi for remote temperature control via an app or voice assistants. You can adjust heat in 1-degree increments from 86°F to 140°F. It measures 14.2 inches high and 9.5 inches wide. The compact design mounts flush to walls for space saving.

Pros

• 11 kW power output for 240V circuits
• Wi-Fi connectivity for app and voice control
• Precise 1-degree temperature adjustment range
• ETL safety certified with multi-layer protection

Cons

• Limited to single-point use applications
• Requires a dedicated 50-amp double-pole breaker
• Minimum activation flow of 0.4 GPM

Good fit if

• You need hot water for one fixture only
• You want remote temperature control via Wi-Fi
• You have a 240V circuit with 50-amp capacity

Skip if

• You require simultaneous hot water for multiple fixtures
• You only have 120V electrical outlets available
• You need a unit with lower amperage requirements

Verdict: Westinghouse APOLO-11kW Electric provides reliable single-point heating with smart features. It suits users who prioritize app control and precise temperature settings for one shower or sink.

4 Also great

Westinghouse 11kW 240V Electric Tankless Water Heater

Best for: single-point bathroom or kitchen use

Wattage

11 kW (what this guide is about)

Fuel Type

Electric

Voltage

240V

Dimensions

14.2 x 9.5 x 9.5 inches

View on Amazon: Westinghouse 11kW 240V Electric Tankless Water Heater Affiliate link

This Westinghouse electric unit delivers 11 kW of heating power at 240V. It is designed for single-point use, such as a bathroom sink or shower. The compact housing measures 14.2 by 9.5 by 9.5 inches. It fits well in tight spaces where wall mounting is necessary. You get reliable on-demand hot water without the bulk of a storage tank.

Pros

• 11 kW output for consistent hot water
• Compact 14.2 x 9.5 x 9.5 inch footprint
• Standard 240V electric connection
• Light Gray finish blends with walls

Cons

• Limited to single-point applications
• No smart connectivity or Wi-Fi control
• Basic digital interface without advanced features

Good fit if

• You need a heater for one specific fixture
• You have a 240V electrical circuit available
• You want a compact unit for tight spaces

Skip if

• You require Wi-Fi remote control
• You need to heat multiple fixtures simultaneously
• You prefer a larger unit with more features

Verdict: Westinghouse 11kW 240V Tankless Heater is a solid choice for homeowners who need reliable hot water for a single bathroom or kitchen sink. It suits those who prioritize straightforward installation and compact size over smart home integration.

Specifications side by side

How to choose the right one

1. Verify electrical capacity

   Each Westinghouse 11 kW model requires a dedicated 240V circuit and a 60A breaker. You must confirm your home’s electrical panel can support this load. The Westinghouse 11 kW Smart Wi-Fi Tankless Water Heater (position 1) shares these requirements with all others in the list. If your panel lacks space or capacity, you cannot install these units safely. Consult a licensed electrician to upgrade your service if needed. This high amperage ensures consistent heating but limits installation to homes with sufficient electrical infrastructure. Do not attempt to bypass these safety standards.

2. Match single-point needs

   These 11 kW units are designed for single-point applications, such as one shower or one sink. They do not have the capacity to supply hot water to multiple fixtures simultaneously. The Westinghouse 11kW Wi-Fi Tankless Water Heater (position 2) is optimized for this specific use case. If you need hot water for a whole house or multiple bathrooms, this wattage is insufficient. Choose this size only if you are replacing a single faucet or showerhead. This ensures you get instant hot water without overwhelming your electrical system.

3. Check physical dimensions

   Installation space varies among the models. The Westinghouse 11kW Wi-Fi Tankless Water Heater (position 2) is the most compact, measuring just 3.58 inches in height. Other models, like the one at position 1, are taller at 12.6 inches. Measure your available wall space carefully before purchasing. Ensure you have clearance for water connections and maintenance access. The slim profile of the position 2 unit makes it ideal for tight closets or under-sink installations. Compare the width and length specs to fit your specific layout constraints.

4. Decide on smart features

   Some models include built-in WiFi for remote control, while others do not. The Westinghouse 11 kW Smart Wi-Fi Tankless Water Heater (position 1) offers app-based management. If you prefer a straightforward setup without digital integration, the model at position 4 provides basic functionality. WiFi allows you to adjust temperatures from your phone. However, it requires a stable network connection. Choose the smart version if you value remote monitoring. Select the non-smart model if you want a simple, dedicated heating solution without connectivity dependencies.

5. Confirm voltage compatibility

   All listed Westinghouse units operate on 240V power. You cannot use these heaters on standard 120V household outlets. Verify that your installation site has the correct voltage supply. The Westinghouse 11kW 240V Electric Tankless Water Heater (position 4) explicitly states this requirement. Using the wrong voltage will damage the unit and void warranties. This is a non-negotiable spec for all electric tankless heaters in this category. Ensure your wiring and breaker box match the 240V standard before proceeding with any purchase.

Frequently asked questions

See also

• best westinghouse tankless water heaters with WiFi
• best westinghouse tankless water heaters under 300
• best westinghouse tankless water heaters
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