Best WINTEMP Tankless Water Heaters: 3 Models Compared

Quick picks

Our 3 picks

1 Best overall

WINTEMP 36kW Electric Tankless Water Heater

Best for: High-flow needs in homes with strong electrical service

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

This WINTEMP WN36 unit delivers 36kW of power at 240V, supporting up to 8.7 GPM flow. It uses self-modulating technology to adjust output based on incoming water temperature and flow rate. The compact 13.7 x 21.5 x 5.2 inch design saves space. Built-in WiFi allows remote control via smartphone. ETL certification ensures safety standards are met for consistent hot water delivery.

Pros

• High 36kW wattage supports up to 8.7 GPM flow rate
• Built-in WiFi enables remote temperature control from a smartphone
• Self-modulating technology adjusts power for stable water temperature
• ETL certified for safe and reliable operation

Cons

• Requires four 40A double-pole circuit breakers and substantial wiring
• Heavier at 36.1 pounds compared to lower-capacity models
• Limited to 2-year replacement warranty

Good fit if

• You have a 300A electrical service and can install four 40A breakers
• You need high flow for 3–5 bathrooms in mild climates
• You want remote temperature adjustments via WiFi

Skip if

• You have a standard 100A or 200A electrical service
• You cannot run four 8/2 AWG cables
• You need a unit for multiple simultaneous high-flow uses in cold climates

Verdict: WINTEMP 36kW Electric Tankless Water Heater fits homes with robust electrical infrastructure needing high flow. It suits users who value remote control and consistent temperature for multiple bathrooms.

2 Best premium

WINTEMP 18 kW Smart WiFi Tankless Water Heater

Best for: small households with strong electrical setups

Fuel Type

Electric

Flow Rate

Up to 4.3 GPM

Wattage

18 kW

Voltage

240V

Temperature Control

86°F–140°F

Certification

ETL

View on Amazon: WINTEMP 18 kW Smart WiFi Tankless Water Heater Affiliate link

The WINTEMP 18kW model delivers up to 4.3 GPM of hot water at 240V. It uses WiFi for remote temperature control and flow monitoring. The unit measures 15.9 x 13 x 4.2 inches and weighs 19.5 pounds. It suits households with 2–3 simultaneous points of use. ETL certification ensures safety standards are met for your installation.

Pros

• 18 kW heating power for steady hot water output
• WiFi app control for remote temperature and usage monitoring
• Compact wall-mounted design saves installation space
• ETL certified for safety and reliability

Cons

• Requires 2 × 40 Amp double-pole breakers and 8 AWG wiring
• Lower flow rate than the 36kW model on this list
• Limited to electric fuel type with 240V requirement

Good fit if

• You need a compact unit for a small bathroom or kitchen
• You want remote monitoring via a smartphone app
• You have the electrical capacity for 8 AWG wiring

Skip if

• You require higher flow rates for multiple full bathrooms
• You cannot install 240V dedicated circuits with 40 Amp breakers
• You prefer gas-powered heating systems

Verdict: WINTEMP 18kW Electric Tankless Water Heater is a space-saving option for small households with adequate electrical infrastructure. It fits buyers who prioritize remote app control and compact dimensions over maximum flow capacity.

3 Best budget

WINTEMP 11kW 240V Electric Tankless Water Heater

Best for: Single bathroom sink point-of-use installation

Fuel Type

Electric

Flow Rate

Up to 2.6 GPM

Wattage

11 kW

Voltage

240V

Temperature Control

86°F–140°F

Certification

ETL

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

This WINTEMP 11kW unit delivers up to 2.6 GPM of hot water at 240V. It features a compact 9.7 x 14 x 3.4-inch design and digital temperature control from 86°F to 140°F. The self-modulating technology adjusts power based on flow rate to maintain stable temperatures. It is ideal for point-of-use applications like bathroom sinks and faucets where high flow is not required.

Pros

• Provides up to 2.6 GPM for continuous hot water
• Compact dimensions of 9.7 x 14 x 3.4 inches save space
• Digital display allows precise temperature adjustment from 86°F to 140°F
• ETL certified with overheat and dry-fire protection

Cons

• Lower flow rate of 2.6 GPM limits simultaneous use
• Requires 8 AWG wiring and a 50 Amp breaker
• No WiFi connectivity for remote monitoring or control

Good fit if

• You need a compact heater for a single bathroom sink
• You want stable temperature control for point-of-use applications
• You have the required 50 Amp breaker and 8 AWG wiring installed

Skip if

• You need to supply hot water to multiple fixtures at once
• You require WiFi connectivity for remote temperature adjustments
• Your electrical panel cannot support a 50 Amp double-pole breaker

Verdict: WINTEMP 11kW Electric Tankless Water Heater is a compact, reliable option for single-fixture applications. It suits buyers who prioritize space savings and stable temperature control over high flow rates or smart features.

Specifications side by side

WINTEMP Tankless Water Heater Models

All three WINTEMP units run on 240V electricity. The WINTEMP 36kW Electric Tankless Water Heater delivers 36 kW of power. It measures 13.7 inches wide and weighs 36.1 pounds. This model suits homes with strong electrical service and high flow needs. It includes WiFi for remote control.

The WINTEMP 18 kW Smart WiFi Tankless Water Heater offers 18 kW in a 13-inch wide frame. It weighs 19.5 pounds. This unit fits small households prioritizing compact dimensions. The WINTEMP 11kW 240V Electric Tankless Water Heater provides 11 kW. It is the smallest option at 9.7 inches wide and 8.6 pounds. It works well for single bathroom sink point-of-use installations.

Where WINTEMP Fits Your Home

WINTEMP’s lineup spans from compact point-of-use units to high-capacity whole-home heaters. The smallest model, the 11kW WN-11, weighs just 8.6 pounds and measures 9.7 inches wide. It fits single-fixture applications where space is tight. The mid-range 18kW WM18V adds WiFi control while remaining under 20 pounds. The top-rated 36kW WN36 delivers maximum power for multiple bathrooms but requires robust electrical service and weighs 36.1 pounds. All units are gray and electric. None offer gas options or remote thermostats. You must match your home’s electrical capacity to the chosen wattage.

How to Choose the Right One

1. Check your electrical service

   All WINTEMP models require a 240V circuit. You must verify your home’s electrical panel can support the amperage draw. The 36kW unit draws significantly more power than the 18kW or 11kW versions. If your panel is older or limited, the high-wattage model may trip breakers. Always consult an electrician to confirm your service capacity before selecting a higher kilowatt rating. Proper wiring ensures safe operation and consistent performance for your hot water needs.

2. Match wattage to flow needs

   Wattage determines how much hot water you can produce simultaneously. The 36kW model suits homes with multiple bathrooms or high-flow showers. It delivers consistent heat for robust usage. The 18kW unit is better for smaller households with adequate electrical setups. The 11kW version is designed for single fixtures, like a sink. Choose the wattage that matches your peak daily usage. Higher wattage means higher flow capacity, but requires more electrical infrastructure to support.

3. Plan for installation space

   These units are compact, but dimensions vary. The 36kW model measures 13.7 inches wide and weighs 36.1 pounds. It needs sturdy mounting and clearance for service. The 11kW WN-11 is much smaller at 9.7 inches wide and weighs only 8.6 pounds. It fits easily in tight spaces like under sinks. Measure your installation area carefully. Ensure you have enough room for inlet and outlet connections. Proper spacing prevents overheating and allows for future maintenance access.

4. Consider remote control features

   WiFi capability allows you to monitor and adjust settings from your phone. The 36kW and 18kW models include this feature. It helps you track usage and change temperatures remotely. The 11kW model lacks this connectivity. It is a simpler, reliable option for point-of-use applications where smart features are not needed. Decide if remote monitoring adds value for your routine. WiFi units offer convenience, while non-WiFi models focus on basic, stable temperature control for specific fixtures.

5. Identify the primary use case

   Define whether you need whole-home coverage or point-of-use heating. The 36kW unit is best for whole-home systems with strong electrical service. It supports multiple outlets. The 11kW model is ideal for a single bathroom sink. It provides hot water for one fixture without straining the system. The 18kW model sits in the middle for small households. Match the unit size to your specific application. This ensures you do not overpay for capacity you do not need or underpower your system.

Frequently asked questions

See also

• best WINTEMP tankless water heaters under 200
• best WINTEMP tankless water heaters under 300