The Best Under Sink Water Heater for 2023

Tony Adams
Oct 5, 2023 2:48 AM

An under sink water heater can be a great addition to your home. They are relatively small and can be installed easily under your kitchen sink. This can be a great way to have hot water on demand, without having to wait for the water to heat up. Under sink water heaters can be a great way to save money on your energy bill, as they only heat the water when you need it.

Top Picks

Best Overall: Ecosmart ECO Electric Tankless Water Heater

(EcoSmart's ECO 27 is the most powerful electric tankless water heater on the market, with a 27 kW output.This unit can provide hot water for large homes with multiple bathrooms, or for homes with high demand for hot water.The ECO 27 is more than 50% more efficient than traditional tank water heaters, and will save you money on your energy bills.This unit features patented self-modulating technology, which means that it automatically adjusts its power output to match the water flow rate. This results in a more consistent supply of hot water, and also reduces wear and tear on the unit.)

Best Budget: Bosch Electric Mini-Tank Water Heater

(Tronic 3000 T 2.5-Gallon (ES2.5) - Eliminate Time for Hot Water - Shelf, Wall or Floor Mounted.The Bosch ES4 Tronic 3000 T is a point-of-use water heater that can be mounted on a shelf, wall or floor.It has a 2.5 gallon capacity and provides hot water on demand without the wait.The unit is easy to install and can be used in residential or commercial applications.The Bosch Tronic 3000 T is a great choice for those who want hot water on demand without the wait.)

Editor's Choice: Stiebel Eltron Tankless Water Heater

(The Stiebel Eltron Tempra 36 Trend is a highly efficient and environmentally friendly tankless water heater.It provides an endless supply of hot water on demand, and is capable of accommodating up to three bathrooms at once.The Tempra 36 Trend is also one of the most compact tankless water heaters on the market, making it perfect for small homes or apartments.Its simple design makes it easy to install and maintain, and its white finish compliments any decor.)

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TOP Choice

Stiebel Eltron Tankless Water Heater - Tempra 36 Trend – Electric, On Demand Hot Water, Eco, White

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SCORE
9.2
AI Score

It is a simple and easy-to-use tool that allows you to monitor and analyze the performance of your products or services against a specified set of metrics. The Score is a non-technical user-friendly ranking system that is easy to understand and follow. It is a good tool to understand and use before making a purchase decision. Learn more
Brand
Stiebel Eltron
Prime

SILENT OPERATION – One electronic switch will activate the hot water heater and it’s noise free while in use. Digital temperature display is easy to read, while the interior solid copper heating system does all the power work
TEMPRA 36 TREND – This specific model is 36kW, 240V, requires a min recommended electric service of 300 A, and offers an output water temperature of 68° to 140°F. Check our guides below to compare features of our various Trend and Plus models, each available in different kW levels more

Bosch Electric Mini-Tank Water Heater Tronic 3000 T 2.5-Gallon (ES2.5) - Eliminate Time for Hot Water - Shelf, Wall or Floor Mounted

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SCORE
9.0
AI Score

It is a simple and easy-to-use tool that allows you to monitor and analyze the performance of your products or services against a specified set of metrics. The Score is a non-technical user-friendly ranking system that is easy to understand and follow. It is a good tool to understand and use before making a purchase decision. Learn more
Brand
Bosch Thermotechnology
Prime

LONG LASTING QUALITY: This electric water heater is easy to maintain and has premium glass-lined material for a long service life. (Amps 12A, Volts (VAC) 120)
FAST RECOVERY RATE: Eliminates long waits for hot water at your sink, get on demand hot water at your every need (supplies up to 2 sinks at a time) more

Water Heater Propane, Camplux Outdoor Portable Camping Gas Tankless Hot Water Heaters, 2.11 GPM, White

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SCORE
9.0
AI Score

It is a simple and easy-to-use tool that allows you to monitor and analyze the performance of your products or services against a specified set of metrics. The Score is a non-technical user-friendly ranking system that is easy to understand and follow. It is a good tool to understand and use before making a purchase decision. Learn more
Brand
CAMPLUX ENJOY OUTDOOR LIFE

Easy to Install. The propane tankless water heater only takes you 5 minutes to get 2.11 GPM instant hot water. The tankless water heater is powered by 2 pcs size D batteries.
Important Tips. To avoid gas leakage caused by improper sealing of the water heater, DO NOT TWINE TEFLON TAPE between gas regulator and gas inlet pipe. The portable gas water heater will "caught on fire "with improper operation. Always check gas leakage before operation. more

Ecosmart ECO Electric Tankless Water Heater, 27 KW at 240 Volts, 112.5 Amps with Patented Self Modulating Technology, White

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SCORE
9.0
AI Score

It is a simple and easy-to-use tool that allows you to monitor and analyze the performance of your products or services against a specified set of metrics. The Score is a non-technical user-friendly ranking system that is easy to understand and follow. It is a good tool to understand and use before making a purchase decision. Learn more
Brand
EcoSmart
Prime

Save Energy; EcoSmart tankless electric water heaters are 99% thermal energy efficient; Only heats water when called unlike a tank heater that maintains water temperature even when not being used. Save up to 50% in water heating costs according to the Department of Energy
EcoSmart ECO 27 Sizing; Refer to the sizing map. Requires 3x40 AMP Double Pole Breaker, 27-kilowatt tankless electric water heater ideal for providing hot water for whole home applications; provides between 2.7 and 6.5 gallons-per-minute depending on the inlet water temperature; refer to the sizing guide to select the proper solution more

thermomate Mini Tank Electric Water Heater ES150 1.3 Gallons Point of Use Water Heater for Instant Hot Water Under Kitchen Sink 120V 1440W

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SCORE
8.8
AI Score

It is a simple and easy-to-use tool that allows you to monitor and analyze the performance of your products or services against a specified set of metrics. The Score is a non-technical user-friendly ranking system that is easy to understand and follow. It is a good tool to understand and use before making a purchase decision. Learn more
Brand
thermomate

[Small Compact for Sink] - The hot water heater is compact designed for your sink with dimensions 11.42" x 11.42" x 9.65", can be wall or floor mounted under sink / counter, plug into a standard 120V outlet. Nominal current 12amps
[Adjustable Temperature] - Thermostat with 3 temperature level settings, range from 77°F to 140°F with high temperature limit protection, also a freeze mode to prevent tank from freezing more

Camplux Mini Tank Electric Water Heater 1.3 Gallons Hot Water Heaters 120V, Under Sink Water Heater with Cord Plug 1.44kW

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SCORE
8.8
AI Score

It is a simple and easy-to-use tool that allows you to monitor and analyze the performance of your products or services against a specified set of metrics. The Score is a non-technical user-friendly ranking system that is easy to understand and follow. It is a good tool to understand and use before making a purchase decision. Learn more
Brand
CAMPLUX

OVERHEAT PROTECTION - When the water temperature of the water heater exceeds 203°F, the electric hot water heater will automatically shut down. Protect the safety of you and your family
ADJUSTABLE TEMPERATURE - The point of use water heater has 3 temperature level settings, range from 68°F to 140°F. Thermal efficiency up to 99% more

thermomate Electric Mini Tank Water Heater, ES700 6.5 Gallons Point of Use Water Heater for Instant Hot Water Under Kitchen Sink Plugin Cabled 120V 1440W

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SCORE
8.8
AI Score

It is a simple and easy-to-use tool that allows you to monitor and analyze the performance of your products or services against a specified set of metrics. The Score is a non-technical user-friendly ranking system that is easy to understand and follow. It is a good tool to understand and use before making a purchase decision. Learn more
Brand
thermomate
Prime

Adjustable Temperature - Thermostat with 3 temperature level settings, range from 50°F to 149°F with high temperature limit protection, also a freeze mode to prevent tank from freezing
No More Wait for Hot Water - Point of use 6.5 gallons mini tank water heater provides instant hot water where you need it with fast recovery, reducing standby loss. Thermal efficiency up to 99%. Contact us first for any product issues more

Marey ECO150 220V/240V-14.6kW Tankless Water Heater with Smart Technology, Small, White

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SCORE
8.8
AI Score

It is a simple and easy-to-use tool that allows you to monitor and analyze the performance of your products or services against a specified set of metrics. The Score is a non-technical user-friendly ranking system that is easy to understand and follow. It is a good tool to understand and use before making a purchase decision. Learn more
Brand
MAREY
Prime

ETL approved
Tankless water heaters provide an efficient hot water solution eliminating the stand-by energy consumption of conventional tank units more

Tinsay 2.1 Gallon 8L Electric Mini-Tank Water Heater Electric Instant Water Heater Electric Hot Water Heater for Kitchen Household 110V-USA Delivery,3-6 Days

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SCORE
8.4
AI Score

It is a simple and easy-to-use tool that allows you to monitor and analyze the performance of your products or services against a specified set of metrics. The Score is a non-technical user-friendly ranking system that is easy to understand and follow. It is a good tool to understand and use before making a purchase decision. Learn more
Brand
tinsay
Prime

✪It is applicable for different water pressure of different areas, especially for families which are located on higher floors with low water pressure.
✪The temperature can be adjusted between 30℃-65℃ optionally, and the power will be off automatically when the set temperature is achieved. Good temperature control effect and energy and power saving more

110V-120V 1.5Kw Electric Tank Hot 2.5 Gallon Water Heater Storage，Small Under Sink Counter RV TR Endless Trailer Kitchen Compact Point-of-Use,1 PCs 16” Long 1/2”FIP Stainless Steel Water Hoses 9.5L

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SCORE
8.2
AI Score

It is a simple and easy-to-use tool that allows you to monitor and analyze the performance of your products or services against a specified set of metrics. The Score is a non-technical user-friendly ranking system that is easy to understand and follow. It is a good tool to understand and use before making a purchase decision. Learn more
Brand
BISELONG
Prime

If you have any questions about the product, you can contact us in time, and the customer service is online 24 hours a day for you
There are many malicious comments recently, and the only one thing we can do is improve product quality and service continuously. If any product quality problems occur within one year of purchasing the product, we will replace it free of charge. more

Last update on 2023-10-05 / Affiliate links / Images, Product Titles, and Product Highlights from Amazon Product Advertising API

1 ratings

FAQs

Can I put a water heater under the sink?

No, you cannot put a water heater under the sink. Water heaters must be installed in a location where there is adequate ventilation and where the temperature will not exceed 120 degrees Fahrenheit.

Can under sink water heater be used for shower?

Yes, an under sink water heater can be used for a shower. However, it is important to make sure that the unit is properly installed and that there is enough water pressure for the shower.

Why is my water heater not heating up?

There are several reasons your water heater may not be heating up. The first is that the pilot light may be out. If this is the case, relight the pilot light following the instructions in your water heater's manual. Another possibility is that the thermostat may be set too low. Adjust the thermostat to a higher temperature and wait a few hours to see if the water heater heats up. Finally, there may not be enough gas or electricity flowing to the water heater.

Should there be water in the pan under my water heater?

There is no need for water in the pan under your water heater, as the water heater itself will not leak. However, if you have a gas water heater, it is important to have a pan under the unit in case of a gas leak.

How many watts does an under sink water heater use?

Most under sink water heaters use between 500 and 1,500 watts.

Conclusion

The under sink water heater is a great way to have hot water on demand without taking up a lot of space. They are easy to install and can be used in a variety of settings. Whether you are looking for a way to save space or want the convenience of having hot water right at your fingertips, an under sink water heater is the perfect solution.