Under Sink Hot Water Heater

The Best Tankless Water Heaters for Under the Sink in a Home

It is no surprise that people have grown into liking the tankless water heaters considering its diverse benefits in a household. For instance, if your family uses around 40 gallons of hot water in a day, you can save up to 34 percent on your water-heating bill and to top it all up, you will always have a continuous supply of hot water.

So, how does it work?

The tankless water heater is basically a system that provides hot water to your sink. As its name suggests, it does not have a tank, all that is required is running water which is heated as it passes through the unit. The fact that there is no storage unit means there is an endless capacity of hot water that you can obtain at any preferred temperature whenever you need it. The whole unit is small thus can fit under the sink, under the counter and other convenient places. Its convenient size has made it an excellent choice for most homes.

However, due to constant technological advancement, there has been a wide range of models of tankless water tanks in the market today. This article includes details and the necessary specs of the best tankless water heaters to help you choose the right one.

  1. EcoSmart ECO 11 Electric Tankless Water Heater, 13KW

Ecosmart tankless water tank is a modern looking design utilizing the latest technology. It is equipped with a thermostat knob that you can use to set the temperature you need. The temperature will be displayed on a monitor above it. The unit is small (measuring 6.5 x 13.5 x 10 inches) and light as it weighs around 6.5 pounds, hence favorable for installing anywhere you need without having to make significant changes or disruptions in your home.

The EcoSmart manufactures have made sure that its design provides you with endless hot water supply. Water is only heated when passing through the unit; therefore, it ends up saving energy by cutting down heating costs up to 50%.

Apart from heating up to 2 gallons of water in a minute, ECO11 can also be used for multiple applications. It can support two sinks and a shower running simultaneously in optimal temperatures of 67F and two sinks in colder temperatures.

Visit amazon.com for your ultimate deal on this excellent home appliance at $184.99

  1. Stiebel Eltron DHC 3-1 Electric Tankless Water Heater, 120V

This stands as the most energy efficient heater. Stiebel Eltron uses German technology to produce quality heaters. The DHC 3-1 has an energy efficiency level of about 50% energy less than most conventional heaters. For that, it is the ideal heater suitable for both commercial and residential areas. It is equipped with both manual and automatic controls so you can set the temperatures you need and save water at the same time. This particular model uses a copper heating system which grants it a longer life span and a smooth performance throughout. It weighs light making it easier and convenient to install in your home.

Visit amazon.com for an irresistible deal of $179 for this gorgeous piece of home appliance.

  1. Bosch ES2.5-Point-Of-Use Electric Mini-Tank Water Heater, 2.7-Gallon

This under sink water heater has been much appreciated by customers for its convenience. It comes in three sizes; small, medium and large. These many options offer more ideas for the multiple places you can install it. Whether you choose to put it under the sink, hang it on the wall whatever the place you would want it, it will work just fine.

It’s one limitation is that its hot water only lasts for a few minutes. However, if you connect the unit to the main water line, you will be good to go and enjoy all its perks. Though it can support one sink area, you can also connect to a bigger tank water heater to improve the flow of hot water as it will be heated faster. It is particularly very ideal for smaller living spaces. The fact that it is easy to install has a very modern design and is fast essential for a busy homestead.

Visit amazon.com for a great deal of $201.99 for the ultimate tankless heater for your home.

  1. Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater

This heater has a modern design equipped with diverse functions preferable for domestic use that you should consider for your home. It has a digital thermostatic control that you can adjust the temperature of the water according to your needs with 1-degree accuracy. It is also equipped with a LED display making it easier to navigate.

The RTEX-13 comes with a three-foot electric cable, a half NPT adapter and a half inch compression water connection. Its heating elements are made of copper which complements its quality for a prolonged lifespan. It will go easy on your water heating bill as it has a 98.8% energy efficiency with external controls that adjust the temperature per 1F.

More, it has impeccable usability specs that encompass easy installation, easy replacement, and a digital temperature display. Its size is convenient (dimensions of 4 by 9 by 13 inches) and a weight of 8.5 pounds suitable for fitting even in tight areas.

It is available in amazon.com at a great deal of $299.6

  1. Eemax EEM24006 Electric Tankless Water Heater 6KW Blue

This is a tankless water heater designed to supply hot water continuously and instant. The Eemax EEM24006 makes sure the hot water supply is consistent and endless – it will only heat the water when turned on thus saving you heating energy. It utilizes the most advanced and self-modulating technology with a very compact size that saves a lot of storage space. The heater is ideal for points of use that require one gallon per minute of water, and in the colder regions that need 0.5 gallons of water per minute. It is suitable for both single and multiple lavatory sinks. This heater can be used in line with a bigger water heater to boost it.

It is available on amazon.com at $199 on this great water heater for your home appliance

  1. Atmor AT-910-24TP ThermoPro 24 kW/240V 4.6 GPM Digital Tankless Electric Water Heater

This heater is designed to supply unlimited hot water without having to wait. The self-modulating advanced technology regulates the amount of energy required to heat the water enabling you to save water and energy immensely. It is equipped with an easy-to-use digital panel that allows you full control to adjust the water temperatures for the perfect water temperatures that you need.

It is compact allowing you to save on storage space, and it can be installed anywhere without disrupting your living space. Its interior is made of stainless-steel durable and corrosion resistant making its life span quite long, and it’s heating quite efficient. It weighs 17 pounds with 17.4 by 5.2 by 13. 4 inches dimensions.

It is designed to support four applications simultaneously could be two showers, a kitchen sink, and a bathroom sink. It is essential that you consider your incoming water temperature as it will affect the number of applications to be supported by your heater. Colder water temperature on your incoming water will require a higher temperature rise to reach the desired output temperature. Thus, in colder climates, fewer applications will be supported by the heater.

It is available at amazon.com at $318.37.

  1. ECOTOUCH Electric Tankless Water Heater Point-of-Use Hot Water Heater Digital Display for Energy Efficiency 5.5kW at 240V

This tankless water heater is designed to supply you with instant unlimited hot water. It is consistent in its temperature, and there is no waiting for the water to heat up. It heats water instantly, perfect for your sinks with smart self-adjustments, which will adjust the power input required based on the temperature setting and water flow rate.  So, you will have a comfortable experience where the temperature is just right not too hot to scald you and not too much cold either. This helps you to save energy as less power will be applied for reduced water flow especially since it has an energy efficiency of 98%.

It is easy to use with its digital display and touch control panels. Setting up the temperature is rather easy. You just need to turn on the tap and have hot water according to your temperature specifications. Some come with a remote control that is useful when you install your unit under the sink.

With this unit safety has been taken into consideration, tests are carried out on every piece of the unit to ensure they are completely safe. Electric and water lines are designed to run separately to avoid any dangers that may result in case of a leak. The unit is made of quality material so that it is durable with a long-life span. The unit is compact allowing for installation anywhere from hospitals, schools your kitchen and even a bar.

This great tankless water heater is available in amazon.com at $109.99 visit their website for purchase.

  1. Camplux Pro 26L 6.86 GPM Outdoor Propane Tankless Water Heater

Campus 6.86 GPM tankless gas water heater is ideal for the whole household use. It is designed to supply consistent hot water supporting more than two applications simultaneously. It has a constant temperature function that allows you to access consistent hot water at a predetermined temperature. 6.86 gallons of water per minute allows you a continuous supply of hot water on demand. That means a warm bath for your whole home at any time. It has an anti-freezing device which will automatically heat when the temperatures go lower than 40F.

It is equipped with adjustable temperature between 99F to 140F, with digital remote control that is designed to control water temperatures indoors conveniently. There is also an outdoor installation that makes additional vent pipes unnecessary. It makes use of an innovative combustion technology with various advanced protection systems for your safety including flame failure device, overheating device and anti-freezing device.

Complex tankless propane water heater line is designed to work well with elevations not higher than 2000ft. It will also help you save both energy and money with its compact design with the energy factor of 0.82 for propane gas.

It is available at amazon.com with an impressive price of $499.99.

  1. Stiebel Eltron 232886 Tempra 36 Tankless Electric Water Heater

This is a whole house water heater with an adjustable temperature range between 86F and 140F supplying constant hot water to all your household on demand. You can adjust the water temperature to the desired temperature at any time. It is equipped with advanced microprocessor technology that ensures that the water temperature does not change from the set temperature. Thus, you can enjoy the water at your desired temperature as long as you like. It is light and compact with a weight of one pond and 16.5 x 6.5 x 18.5 inches dimensions.

Its heating interiors are made of copper ensuring that there are immensely effective and durable. It also has a digital display making the setting of temperatures quite easy. It is equipped with an advanced auto modulation technology that allows you save a lot of energy the fact that the water is heated when you turn in on ensures there are no standby losses further saving energy. It has an advanced flow control that provides constant comfort by maintaining hot water temperatures. The heating is quiet meaning no disruptions with buzzing sounds offering you great peace and tranquility.

Its sleek design makes it fit anywhere you choose to install in your home. It is also of superior quality offering reliable service.

This great piece is available on amazon.com at $749.


Tankless water heaters have proved to be an excellent addition for every household. They come with significant advantages that revolve around the reduction of energy consumption. Therefore, they are a much better option than big water heaters tanks that even attract contaminations through prolonged storage. Rust is also another thing prevented by the tankless water heaters as the water is continuously flowing.

Well, if you want to get the best deal out of your buck, there are several factors you need to consider when deciding on the model of the tankless water heater you want to install. Consider your incoming water temperature which will mostly vary with season and your location. The flow rate, number of applications you need the hot water for and the output temperature you desire.