Westinghouse Under Sink Electric Hot vs Westinghouse Wifi Tankless Water Heater: Spec Comparison
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You are comparing the westinghouse under sink electric hot vs wifi tankless water heater. Both units are electric and designed for point-of-use hot water. The main difference lies in their storage method and power requirements. One model uses a small tank to store heated water, while the other heats water instantly on demand. Understanding these specs helps you pick the right fit for your home.
Key differences
| Aspect | Westinghouse 11kW Smart Wi-Fi Tankless Water Heater | Westinghouse 1.5-Gallon 120V Mini Tank Water Heater |
|---|---|---|
| Type | Tankless | Mini Tank |
| Capacity | On-demand (up to 2.6 GPM) | 1.5 gallons |
| Voltage | 240V | 120V |
| Wattage | 11 kW | 1440W |
| Smart Features | Wi-Fi and app control | Not listed |
| Certification | ETL | CSA |
Which one should you choose?
Choose Westinghouse 11kW Smart Wi-Fi Tankless Water Heater if
- You want hot water on demand without waiting for a tank to reheat.
- You have a dedicated 240V circuit and 50-amp breaker available.
- You prefer remote temperature control via a smartphone app.
Choose Westinghouse 1.5-Gallon 120V Mini Tank Water Heater if
- You need a simple plug-in unit for a standard 120V outlet.
- You require immediate hot water availability in tight under-sink spaces.
- You want a basic setup without complex wiring or smart features.
Verdict: The tankless model suits those with the electrical infrastructure for higher power and smart control. The mini tank is better for standard outlets and simple, compact installations. Choose based on your available wiring and need for stored versus instant heat.
Key Spec Differences Compared
Power and Voltage
The Westinghouse 11kW Smart Wi-Fi Tankless Water Heater requires a dedicated 240V circuit with a 50-amp double-pole breaker and 8 AWG wiring. It draws 46 amps to deliver its full 11 kW output. In contrast, the Westinghouse 1.5-Gallon 120V Mini Tank Water Heater runs on standard 120V power. It uses a 1440W heating element and plugs into a regular outlet. This makes the mini tank significantly easier to install in locations without heavy-duty electrical infrastructure. If you lack a 240V line, the 120V model is the practical choice for immediate use without an electrician.
Hot Water Delivery
The tankless unit provides continuous hot water on demand. It delivers up to 2.6 GPM with an activation flow of 0.4 GPM, suitable for one shower or multiple points of use simultaneously. The mini tank stores 1.5 gallons of pre-heated water. It is designed for handwashing and quick cleanup at a single sink. Once the stored hot water is used, you must wait for the 1440W element to reheat the tank. The tankless heater offers unlimited flow for longer tasks, while the mini tank is limited by its small 1.5-gallon capacity and slower recovery rate.
Smart Features
The Westinghouse 11kW Smart Wi-Fi Tankless Water Heater includes built-in Wi-Fi connectivity. You can control the water temperature remotely via an app or voice commands compatible with Alexa and Google Home. It allows precise adjustments in 1-degree increments from 86°F to 140°F, with an LED display for real-time status. The Westinghouse 1.5-Gallon 120V Mini Tank Water Heater lacks any smart features or connectivity options. It operates purely mechanically. If remote monitoring or voice control is important to your daily routine, the tankless model is the only option with these capabilities.
Dimensions and Mounting
The tankless heater measures 14.2 inches high, 9.5 inches wide, and 3.5 inches deep. It weighs 10 pounds and mounts flush to the wall, saving space. The mini tank is slightly larger, measuring 15.7 inches high, 10.1 inches wide, and 10.1 inches deep. It weighs 11 pounds. Both units are compact point-of-use designs. The tankless unit is thinner, making it better for tight under-sink or closet spaces. The mini tank has a bulkier footprint due to its storage tank. Choose the tankless model for a slimmer profile and the mini tank if you need vertical storage capacity.
Safety Certifications
Both units carry major safety certifications. The tankless heater is ETL certified with four layers of protection: leakage, overheat, dry-fire, and high voltage. It features separated water-electricity pathways to prevent corrosion. The mini tank is CSA listed with dry-fire, over-temperature, and pressure relief protection. It also holds an IPX4 rating for splash resistance. Both ensure safe operation in residential settings. The tankless model emphasizes electrical isolation, while the mini tank focuses on pressure and temperature relief. Neither has a clear safety advantage, as both meet rigorous industry standards for point-of-use electric heaters.
Which tankless or mini tank fits you
Users with smart home integration needs
This model supports Wi-Fi connectivity and voice commands via Alexa or Google Home. You can adjust the water temperature in precise 1-degree increments from 86°F to 140°F using the app. The LED display provides real-time status updates, allowing you to monitor performance remotely without needing to access the unit physically.
Renters or those with standard outlets
This unit operates on a standard 120V circuit and plugs directly into a regular outlet. It requires no special wiring or dedicated breaker installation. The 1.5-gallon capacity stores hot water for handwashing at a single sink. This setup eliminates the need for electrical upgrades, making it ideal for easy installation in apartments or tight spaces.
Users needing continuous hot water flow
The 11kW tankless design delivers continuous hot water on demand with a flow rate up to 2.56 GPM. It activates at just 0.4 GPM, ensuring consistent temperature without the risk of running out of heated water. This is suitable for simultaneous use at one shower or sink, unlike the limited storage capacity of the mini tank model.
The products compared
Westinghouse 11kW Smart Wi-Fi Tankless Water Heater
Best for: Single-point use with smart control
- Fuel Type
- Electric
- Flow Rate
- 2.56 GPM
- Wattage
- 11kW
- 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 unit is a 11 kW, 240 V electric tankless water heater designed for point-of-use applications. It delivers up to 2.6 GPM with an activation flow of 0.4 GPM. The device features WiFi connectivity for remote temperature control via an app or voice commands. Its compact dimensions allow for flush wall mounting. It includes an LED display and precise temperature adjustments in 1° increments from 86°F to 140°F.
Pros
- WiFi and voice control compatibility
- Precise 1° temperature adjustments
- Compact flush-mount design
- ETL safety certified
Cons
- Requires 46 A amperage
- Needs a 50 A double-pole breaker
- Higher power demand than mini tanks
Good fit if
- You want remote temperature control
- You have a 240 V circuit available
- You need continuous hot water for one point
Skip if
- You only have a 120 V outlet
- You cannot install a 50 A breaker
- You need hot water for multiple simultaneous showers
Verdict: Westinghouse WiFi Electric Tankless Heater fits users with dedicated 240 V circuits who value smart control. It provides steady hot water for single-point use without the storage limits of a tank.
Westinghouse 1.5-Gallon 120V Mini Tank Water Heater
Best for: Single sink handwashing and light cleanup
- Fuel Type
- Electric
- Wattage
- 1440W
- Capacity
- 1.5 Gallon
- Voltage
- 120 V
- Certification
- CSA
- Dimensions
- 15.7 x 10.1 x 10.1 inches
View on Amazon: Westinghouse 1.5-Gallon 120V Mini Tank Water Heater Affiliate link
This Westinghouse mini tank stores 1.5 gallons of hot water at 1440W on a standard 120V circuit. Its compact 15.7 x 10.1 x 10.1 inch footprint fits tight under-sink spaces. You get CSA safety certification and a 6-year tank warranty. It suits single sinks where you need instant hot water for handwashing without waiting for a main heater.
Pros
- 1.5-gallon capacity keeps hot water ready at the tap
- Plugs into standard 120V outlets with no special wiring
- CSA certified with over-temperature and pressure relief protection
- Compact 11-pound design fits tight under-sink spaces
Cons
- 1440W heating element recovers slower than high-power tankless units
- 1.5-gallon tank empties quickly during continuous use
- Limited to point-of-use applications only
Good fit if
- You need hot water for a single bathroom or kitchen sink
- You have a standard 120V outlet under the sink
- You want a compact unit for tight spaces
Skip if
- You need to run a shower or tub
- You require instant hot water without a storage tank
- You need high capacity for multiple simultaneous uses
Verdict: Westinghouse 1.5 Gal 120V Under Sink Heater fits single sinks where you need reliable hot water for handwashing. It suits users who want easy 120V installation and compact storage in tight spaces.
Specifications side by side
| Spec | Westinghouse 11kW Smart Wi-Fi Tankless Water Heater | Westinghouse 1.5-Gallon 120V Mini Tank Water Heater |
|---|---|---|
| Fuel Type | Electric | Electric |
| Flow Rate | 2.56 GPM | not stated |
| Wattage | 11kW | 1440W |
| Capacity | not stated | 1.5 Gallon |
| Voltage | 240V | 120 V |
| Temperature Control | 86°F to 140°F, ±1°F | not stated |
| Certification | ETL | CSA |
| Dimensions | 14.2" x 9.5" x 3.5" | 15.7 x 10.1 x 10.1 inches |
| Use | not stated | RV, Under Sink |
| Features | WiFi | not stated |
| Weight | 10 pounds | 11 pounds |
| Size | S-11 | 1.5 Gallon |
| Color | Gray 11 | Gray |
| Model | WET-11K-G | ES015A1G |
Frequently asked questions
Can the Westinghouse WiFi tankless heater replace a standard under-sink mini tank?
It depends on your electrical setup and hot water needs. The 11kW tankless unit requires a dedicated 240V circuit with a 50-amp breaker, while the 1.5-gallon mini tank runs on standard 120V power. If you already have the necessary 240V wiring, the tankless model offers on-demand heating without storage limits.
Which Westinghouse heater is smaller for tight under-sink cabinets?
The 1.5-gallon mini tank is slightly wider and taller than the tankless unit. It measures 10.1 inches in width and 15.7 inches in height. The 11kW tankless model is more compact at 9.5 inches wide and 14.2 inches high. Both fit under most standard sinks, but the tankless version takes up less vertical space.
Does the Westinghouse tankless water heater need special wiring?
Yes, it requires significant electrical infrastructure. You must install a dedicated 240V circuit with a 50-amp double-pole breaker and 8 AWG wiring. The unit draws 46 amps at full load. This is a major difference from the 1.5-gallon model, which plugs into a standard 120V outlet.
Can I control the Westinghouse tankless heater with my phone?
Yes, the 11kW model includes Wi-Fi connectivity. You can adjust water temperature in precise 1-degree increments from 86°F to 140°F using the app. It also supports voice commands via Alexa or Google Home. The 1.5-gallon mini tank does not have smart features or remote control options.
Is the Westinghouse mini tank good for handwashing only?
It is designed specifically for single-sink handwashing and light cleanup. The 1.5-gallon storage provides reliable hot water for short tasks. It is not ideal for showers or multiple fixtures. If you need higher flow or continuous hot water for other uses, the tankless model is a better choice.
How much does the Westinghouse tankless heater weigh?
The 11kW Smart Wi-Fi Tankless Water Heater weighs 10 pounds. It is slightly lighter than the 1.5-gallon mini tank, which weighs 11 pounds. Both units are relatively light, making them easy to mount under a sink. The tankless model has a gray finish and compact dimensions.