The Best Under Sink Water Heater

What is the best under sink water heater to buy? There are hundreds of units that you can get on the market today.

However, we have reviewed the top six models for 2020 to help you pick the one that meets your needs. 

Under Sink Water Heater Reviews for 2020 – Top 6 Models 

Below are the top six under sink water heaters that can give you value for money.

1. Bosch Thermotechnology Electric Mini-Tank Water Heater

Key Specifications 

• Item weight: 15.5 pounds 
• Item measurements: 13.8 x 10.8 x 13. 8 inches 
• Size: 2.5 gallons 
• Wattage: 1140 watts
• Voltage: 12v
• Color: white 
• Warranty: 2-year on parts, 6-year on unit 

In-Depth Review 

It is an effective warm water heater that fits under the sink to give you easy access to warm water. The model boost of thermal efficiency of 985 and lasts longer than most units out there. 

You can also have an easy time when maintaining the heater, and it comes with quality glass-lined material. It is also easily mounted since you can place it on the floor or shelf. 

The other feature is the fast recovery rate that helps to eliminate downtime that can keep you waiting for hot water. It is the only heater that you will ever need for a long time. 

2. EcoSmart Eco 11 Electric Tankless Water Heater 

Key Specifications

• Item weight: 6.5 pounds
• Item measurements: 3.8 x 8 x 11.5 inches
• Size: 12 x 8 x 4  
• Color: white 
• Wattage: 13000 watts
• Voltage: 220v
• Warranty: lifetime warranty on element, exchanger, and electronics

In-Depth Reviews

The unit comes with a lifetime warranty that ensures you install the heater with confidence that it will last long. It helps to save 60% of the heating cost, thanks to the ECOSMART electric tankless heater. 

That tech ensures that you get hot water when you need it. Another notable feature is the patented self-modulating tech and design that make it a compact model to fit most places.   

It is made of quality materials that allow it to take heavy beatings to last for decades. You can get value for your money when you choose this heater. 

3. Bosch Thermotechnology Electric Mini-Tank Water Heater

Key Specifications

• Item weight: 17.3 pounds
• Item measurements: 13.8 x 13.5 x 13.8 inches 
• Size: 4 gallons
• Color: white 
• Wattage: 1440 watts
• Voltage: 120v
• Warranty: 2-year on parts, 6-year on unit

In-Depth Review

It is a model that you can easily mount on the floor or shelf, and the package comes with everything you would need to install it. The model ensures that you get hot water due to its fast recovery rate.

Another thing, the heater can supply hot water for up to 2-sink at a go thanks to the 4-gallon output. You can easily install it under your sink, where it makes it easier to access hot water.

The other feature is the durability it gives you thanks to its strong material. You can have confidence that the unit remains rust-free to give you long term service. 

4. ECOTOUCH Electric Tankless Water Heater 

Key Specifications 

• Item weight: 6.85 pounds
• Item measurements: 14.9 x 10.8 x 4.8 inches 
• Color: ECO55-white  
• Flow rate: 1.5 GPM
• Wattage: 5.5 kW
• Voltage: 240v

In-Depth Review

The heater supplies you with instant hot water thanks to the 5.5kW heating ability. That means you get warm water of up to 116-degree without needing to preheat the system.

It is the perfect unit for providing your sink with hot water and comes with a smart self-adjust that controls the power depending on the flow rate. The model can save you up to 985 of electricity, thanks to this unique feature.

It gives you an easy time when using it, thanks to the digital display and touch control panel for setting the temperature. There is a black model of this unit that comes with a remote control; this unit doesn’t have a remote. 

5. EcoSmart POU 3.5 Point of Use Electric Tankless Water Heater

Key Specifications 

• Item weight: 4 pounds 
• Item measurements; 3 x 11 x 6 inches 
• Size: 11 x 7 x 2.75 
• Wattage: 3500 watts
• Voltage: 120v
• Warranty: 12-month warranty for element, exchanger, and electronics 

In-Depth Review

The model was designed to provide hot water and has a 0.5 GPM flow rate. It highly recommended you use it in warmer climates and just for one sink. 

One thing to note is that you need to install a 1×30 amp breaker as well as 10 AWG wire. It easily fits on a 0.5” NPT, which is standard for most homes. 

You do not need to spend a lot of money when buying or installing it. That means you can easily install it, and it comes with all the hardware you would need to put it in place. 

6. Ariston Andris 4 Gallon 6 Year 120-Volt Corded Point of Use Mini-Tank Electric Water Heater

Key Specifications 

• Item weight: 22.2 pounds 
• Item measurements: 19.5 x 16 x 14.2 inches 
• Size: 4 gallons 
• Wattage: 1440 watts
• Voltage: 120v 
• Warranty: 6-year on tank, 2-year on parts

In-Depth Review 

It is one of the most accessible models you can find on the market today and comes with a 4-gallon mini-tank. That lets you enjoy instant hot water when you water to use it.

The package includes rubber feet and wall brackets that help you to place it on the floor or wall. It is a DIY installation heater – you do not to spend more money when assembling it. 

The model fits almost anywhere and connects to a 0.5 fitting. And the tank is fully protected to prevent it from getting damaged. 

It is the ideal heater for anyone looking for a system that can last for years and provide consistent hot water. 

How Do Under Sink Water Heaters Work?

They are heaters that you can install under your sink to deliver hot water when you need it. These models don’t have a tank that can require you to preheat the water before you use it.

Instead, it heats the water as it passes toward the faucet within 2 or 3 seconds. 

Final Words 

The best under sink water heater can be an excellent buy if you need hot water instantly. These models help in smaller water tasks like washing dishes and hands and can save you energy and water.