Best Under Sink Water Heaters (REVIEWS 2017)

You just can’t deny the fact that tankless heaters have a vast area of usage, due to their compactness and instant water heating capabilities, you can install them on any point of your piping. Tankless water heaters use less energy compared to other tank heaters. These tankless heaters have another type, which can be installed under your sink, to give hot water. They’re located near water outlet, which saves plenty of water. Because the main heater takes the time to deliver hot water, at least to the reach the outlet point. These heaters can heat the water instantly. They’re available in the tank and tankless models. Installation cost can be reduced by preventing long pipes and joints. Further, installing these heaters is easy. They come with installation guides, and you can install them with tools that are present in the home. They can easily be get mounted on the wall. They have a huge advantage. You have to install them to see the real work they do. These small heaters can be of great use to lessen the time of heating when the house has long piping. These best under sink water heaters reviews will give you a better insight.

Bestselling 6 Under Sink Water Heaters Comparison Chart

  • Ariston GL4S Electric Mini-Tank Water Heater

  • Dimensions : 12.2 x 14 x 14 inches
  • Weight : 23.1 pounds
  • Voltage : 120 volts
  • Ariston GL2.5 Electric Mini-Tank Water Heater

  • Dimensions : 10.5 x 14 x 14 inches
  • Weight : 20.2 pounds
  • Voltage : 120 volts
  • Ecosmart 6 Gallon 120V Electric Minitank Water Heater

  • Dimensions : 20 x 13.8 x 14.5 inches
  • Weight : 25 pounds
  • Voltage : 120 volts
  • WaiWela WM-2.5 Mini Tank Water Heater, 2.5-Gallon

  • Dimensions : 10.8 x 11.8 x 14.5 inches
  • Weight : 18.1 pounds
  • Voltage : 110 volts
  • Atmor AT900-13 Point-of-Use Tankless Electric Instant Water Heater

  • Dimensions : 11.9 x 8.7 x 4.2 inches
  • Weight : 5.2 pounds
  • Voltage : 240 volts
  • Eccotemp EM-2.5 Electric 2.5-Gallon Mini Tank Water Heater

  • Dimensions : 14.5 x 11.8 x 10.4 inches
  • Weight : 17.9 pounds
  • Voltage : 120 volts

TOP 6 UNDER SINK WATER HEATERS REVIEWS

Editor's Choice

Bosch GL4S Ariston Review

This heater by Bosch is tiny, but a performer. This point of use heater is a good thing to have on outlet for heating purposes.

Specifications

  • 120 volts and 1500 Watts
  • Dimensions:12.2 x 14 x 14 inches
  • Weight: 17 pounds
  • Tank Size: 4 Gallons per minute
  • Knob controls temperature
  • Six years warranty, one year on parts
  • No wiring, just plug it in.

This under sink heater is enough to preheat the water before usage. This could be of great help to enhance the heating capacity of the primary heater. Bosch is a reputable brand, and its quality of products always amused people. They last for years, without giving any problem. Coming to the heating, this heater is 1500 watts, which is enough to heat water at the given flow rate of 4 gallons. Though the flow rate is going to suffer, that’s not the primary purpose of this heater. Read best under sink water water heater reviews to know more.

As you can see that this heater is lightweight and compact, giving you the freedom of moving it and installing on any connection. It is one of the best under sink heater available on the market. Now you can save water as you don’t have to go the cold water. You can get hot water instantly with the help of this heater.

The heater comes with six years warranty on the heating element, which means, it is very durable, and the company knows that they have made a quality product. Further a year warranty on the parts. If you’re looking for a decent heater of under sink purpose, this might be the best option available. So go ahead and buy it, to enhance the central heater. It is easily one of the best under sink water heater.

PROS:
  • Instant water heating
  • Temperature knob
  • Lightweight and compact
  • 4 gallons tank

CONS:
  • Low flow rate
  • Not for heavy duty

#2

Bosch GL2.5 Ariston Review

From the same company Bosch, this heater is lighter, smaller and compact that the model reviewed above. Practically the heater is same, just the change in capacity. It is still a good heater for your sink, even if the flow rate is low.

Specifications

  • 120 volts
  • Dimensions:10.5 x 14 x 14 inches
  • Weight: 20.2 pounds
  • Tank Size: 2.5 Gallons
  • Six years warranty, one year on parts
  • No wiring, just plug it in.

Though the capacity of this heater is less than the previous one, that doesn’t mean that this is not any good. You can expect it to perform equally well, in fact, the time it takes to heat the water is less, due to the small capacity tank. 2.5 gallons of instant hot water can be of many uses. You can use it for many purposes like in the kitchen, washing area, etc.

This heater is extremely lightweight and compact, giving you the freedom of moving it and installing on any connection. You can install it under the sink, and no one would notice, due to the size. Also, you don’t need to empty some space near the sink, because this one is very compact. Now you can save water as you don’t have to go the cold water. You can get hot water instantly with the help of this heater.

The heater comes with six years warranty on the heating element, which means, it is very durable, and the company knows that they have made a quality product. Further a year warranty on the parts. This heater surely a good one, because of the size, instant heating and warranty. It is the most recommended under sink water heater.

PROS:
  • Instant water heating
  • Lightweight and compact
  • 2.5 gallons tank

CONS:
  • Low flow rate
  • Not for heavy duty

#3

Ecosmart Mini 6 Review

Ecosmart is a known brand, but you will be amazed by the quality if heaters it manufacturers. The heaters can not only be used for under sink, but also for light bathroom usages. They are available in various tank options, thus making their area of usage quite large.

Specifications

  • 120 volts and 1440 watts
  • Dimensions:20 x 13.8 x 14.5 inches
  • Weight: 25 pounds
  • Tank size: available in 1, 2.5, 4 and 6 gallons option
  • Five years warranty, one year on parts
  • No wiring, just plug it in.

With such options available on the tank, it is not just under sink water heater. You can use it for your daily proposes, and it is quite good for a person. Heating of the water takes place instantly, and in lower tank models. If you go for higher, then it takes some time, but that’s totally okay. You can use it for other purposes than just heating the water at the outlet. This heater has a knob to control the temperature, which is not present in low-end models.

The heater is lightweight, the lower tank models. There is not a significant difference in the weight of 6 gallons. The best part is that they’re compact, even for a tank heater. Accessories to hang the heater is included. You can hang it anywhere due to the compactness of the unit. This unit is a good performer and gives real competition to the local, and international brands.

The heater comes with five years warranty on the heating element, and one year on the parts. Though the company is new to some, it has a splendid reputation. You can buy it, and see the performance yourself.

PROS:
  • Instant water heating
  • Temperature knob
  • Lightweight and compact
  • 1, 2.5, 4 and 6 gallons tank

CONS:
  • Low flow rate

#4

WaiWela WM-2.5 Review

The company is known for making heaters and pools from years. Though this is not mainstream in competition, surely worth a shot. The heater has good performance, along with good features in the budget.

Specifications

  • 120 volts and 1320 watts
  • Dimensions:10.8 x 11.8 x 14.5 inches
  • Weight: 18.1 pounds
  • Tank Size: 2.5 Gallons
  • Six years warranty, two years on parts
  • No wiring, just plug it in.

The company is well established one, and you can rely on this heater for small usages. The water tank is of 2.5 gallons capacity, which means instant hot water supply without any delay. The time taken is less than most of the heaters. This company is often underestimated, but the performance of the heater is one of the best in the segment.

Due to the lightweight and every tiny body, you can install it anywhere. The effort of installation is also minimum. Just plug it and use. You can install it under the sink, and no one would notice, due to the size. Also, you don’t need to empty some space near the sink, because this one is very compact. This unit is going to save of gallons of water, due to its instant heating of water. This unit is suggested for budget concerned people.

The heater comes with six years warranty on the heating element, which expected from the company. Additionally, it is giving couple years warranty on the parts, the maximum in the segment. This is a great plus point, because, in that way, they are telling that their unit is pretty solid. This heater is worth every dollar you would spend. It is one of the best under sink water heater.

PROS:
  • Instant water heating
  • Lightweight and compact
  • 2.5 gallons tank
  • Temperature knob
  • Six years on element, two years on parts warranty

CONS:
  • Low flow rate
  • Not for heavy duty

#5

Atmor AT900-13 Review

This heater is the lightest in this list because it is tankless. Coming to the company, Atmor is a decent company, selling this heater at an affordable price. This heater is a yes, due to no time is taken for hot water to come.

Specifications

  • 240 volts and 13 watts
  • Dimensions:11.9 x 8.7 x 4.2 inches
  • Weight: 5.2 pounds
  • Tankless
  • Six years warranty, two years on parts
  • No wiring, just plug it in.

This is a beast in disguise. The wattage has three settings, 4.5 kW, 8.5 kW and 13 kW. The time taken for water to heat up is zero. This heater uses the right amount of energy but gives results which are pretty good. The only thing the bugs is the flow rate. It decreases once the water passes through that heater. This is not for under sink usage only. You can install it in your bathroom, and it can handle showers. It is perfect for bathroom purposes also.

Due to tremendous power, this heater is a performer, and among the best in the small tankless segment. This can be hanged anywhere near the plug. It is so lightweight that it would give hardly any problem in portability and usage. The design is simple, yet efficient.

The heater comes with seven years warranty on leakage. That means it won’t spill ever. Additionally, it is giving couple years warranty on the parts, the maximum in the segment. The company is offering that much of surety because they know that the unit is reliable. This is a favorite of many customers, and due to the powerful presence, it makes a difference. It is one of the best under sink tankless water heater.

PROS:
  • Instant water heating
  • Lightweight and compact
  • Tankless
  • Temperature switch
  • Seven years on element, two years on parts warranty
  • Heavy duty

CONS:
  • Low flow rate

#6

Eccotemp EM-2.5 Review

Another 2.5 gallons tank heater. The company is decent, with a decent reputation. However, the heater is a performer and heats the water is no time. There are plenty of features, and especially the temperature knob.

Specifications

  • 120 volts and 1440 watts
  • Dimensions:14.5 x 11.8 x 10.4 inches
  • Weight: 17.9 pounds
  • 2.5 gallons tank
  • No wiring, just plug it in.

The heater can raise the temperature from 50 to 140 degrees. This heater is perfect for under the sink. You can also do light jobs in the bathroom with this heater; the temperature knob is useful in regulating the temperature. Further, the body is lightweight and compact. For a tank heater, the size is very less. You can easily hang it on the wall, without making space for it. This heater is perfect for an individual because it meets the needs of a person. It does take some time to heat up, but once done, you can expect a lot of hot water. This heater does a lot more than just under sink heater.

As you can see that this heater is lightweight and compact, giving you the freedom of moving it and installing on any connection. You can get hot water instantly with the help of this heater. Temperature is pressure relief valve is there for the safety of the heater.

The heater has the warranty; you have to claim it from the seller. If you’re looking for a decent heater of under sink purpose, and this surely is one of the options that are worth a try. So go ahead and buy it, to have a good hot water experience.

PROS:
  • Lightweight and compact
  • 2.5 gallons of tank
  • Temperature knob
  • Heavy duty

CONS:
  • Time taken is high

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