20 Best Under Sink Tankless Water Heater [2022]

Are you looking for the best under sink tankless water heater? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling under sink tankless water heater.

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1 Bosch Electric Mini-Tank Water Heater Tronic 3000 T 2.5-Gallon (ES2.5) - Eliminate Time for Hot... Bosch Electric Mini-Tank Water Heater Tronic 3000 T 2.5-Gallon (ES2.5) - Eliminate Time for Hot...
2 EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating... EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating...
3 Tankless Water Heater - 3000W Mini Electric Instant Water Heater Under Sink with LCD Display for... Tankless Water Heater - 3000W Mini Electric Instant Water Heater Under Sink with LCD Display for...
4 Ecosmart POU 3.5 Point of Use Electric Tankless Water Heater, 3.5KW@120-Volt, 6 x 11 x 3 Inch Ecosmart POU 3.5 Point of Use Electric Tankless Water Heater, [email protected], 6 x 11 x 3 Inch
5 Rheem 6kW 240V Point of Use Tankless Electric Water Heater Rheem 6kW 240V Point of Use Tankless Electric Water Heater
6 3000W Mini Water Heater 110V Electric Tankless Instant Hot Water Heater Thermostatic Washing Heating... 3000W Mini Water Heater 110V Electric Tankless Instant Hot Water Heater Thermostatic Washing...
7 Mini Electric Tankless Water Heater - 3000W 110V Small Instant Hot Water Heater with LCD Digital... Mini Electric Tankless Water Heater - 3000W 110V Small Instant Hot Water Heater with LCD Digital...
8 Stiebel Eltron 233219 2.5 gallon, 1300W, 120V SHC 2.5 Mini-Tank Electric Water Heater Stiebel Eltron 233219 2.5 gallon, 1300W, 120V SHC 2.5 Mini-Tank Electric Water Heater
9 Airthereal Electric Tankless Water Heater, 9kW, 240Volts - Endless On-Demand Hot Water - Self... Airthereal Electric Tankless Water Heater, 9kW, 240Volts - Endless On-Demand Hot Water - Self...
10 Mini-Tankless Water Heater, 3000W 110V One-click Heating, Electric Instant Water Heater with... Mini-Tankless Water Heater, 3000W 110V One-click Heating, Electric Instant Water Heater with...
11 Bosch Thermotechnology 7736505871, 9.5kW, Bosch US9-2R Tronic 3000 Electric Tankless Water Heater,... Bosch Thermotechnology 7736505871, 9.5kW, Bosch US9-2R Tronic 3000 Electric Tankless Water...
12 Ecosmart ECO 36 36kw 240V Electric Tankless Water Heater Ecosmart ECO 36 36kw 240V Electric Tankless Water Heater
13 Mini Electric Hot Water Heater,3KW Tankless Instant Warm Water Heater with LCD Display Adjustable... Mini Electric Hot Water Heater,3KW Tankless Instant Warm Water Heater with LCD Display Adjustable...
14 3000W Tankless Mini Hot Water Heater Under Sink 110V Thermostatic Washing Heating System with Remote... 3000W Tankless Mini Hot Water Heater Under Sink 110V Thermostatic Washing Heating System with...
15 LQWY Mini Electric Tankless Water Heater 3000W 110V Instant Hot Water Heater with Remote Control... LQWY Mini Electric Tankless Water Heater 3000W 110V Instant Hot Water Heater with Remote Control...
16 Tankless Water Heater Electric 5.5kw 240V, ECOTOUCH Point-of-Use Hot Water Heater Digital... Tankless Water Heater Electric 5.5kw 240V, ECOTOUCH Point-of-Use Hot Water Heater Digital...
17 Stiebel Eltron 200067 DHX 3.5-1 Trend Point-of-Use Tankless Electronic Water Heater, 120V, 3500... Stiebel Eltron 200067 DHX 3.5-1 Trend Point-of-Use Tankless Electronic Water Heater, 120V, 3500...
18 vinmax 2021 Hot Tankless Water Heater,110V Electric Hot Water Heater - Kitchen Household Electrical... vinmax 2021 Hot Tankless Water Heater,110V Electric Hot Water Heater - Kitchen Household...
19 Water Heater, Tankless Electric Water Heater Portable Wall Mount Instant Heating Hot Water With LCD... Water Heater, Tankless Electric Water Heater Portable Wall Mount Instant Heating Hot Water With...
20 2400W Electric Tankless Water Heater, 120VAC 2400W Electric Tankless Water Heater, 120VAC
Bestseller No. 1
Bosch Electric Mini-Tank Water Heater Tronic 3000 T 2.5-Gallon (ES2.5) - Eliminate Time for Hot...
  • CONVENIENT HOT WATER HEATER: 2.5 gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it. Thermal efficiency...
  • 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...
  • INDEPENDENT INSTALLATION: 36-37" cord plugs into a 120 volt outlet for independent installation or in-line with a large hot water source
  • 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)
  • EASILY MOUNTED: Can be shelf, wall or floor mounted (bracket included); simply tap into the cold water line and install the water heater directly at...
SaleBestseller No. 2
EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating...
  • Endless On-Demand Hot Water; Consistent hot water when you need it that never runs out; Continuously monitored water temperature and controlled flow...
  • Save Space; EcoSmart tankless electric water heaters are 90% smaller than traditional tank heaters; may be installed on wall or at point of use;...
  • Save Energy; EcoSmart tankless electric water heaters are 99% thermal energy efficient; Only heats water when called unlike a tank heater that...
  • EcoSmart ECO 11 Sizing; 13-kilowatt tankless electric water heater ideal for providing hot water for a bathroom, small sink, office breakroom and...
SaleBestseller No. 3
Tankless Water Heater - 3000W Mini Electric Instant Water Heater Under Sink with LCD Display for...
  • 【Eastbuy TANKLESS WATER HEATER 】 NOTICE Before PURCHASE: The water heater need a larger than 32 amps circuit breaker; the outlet water temperature...
  • 【SMART SELF ADJUSTMENT】Temperature adjustment is through the water flowing valve or the tap. The water flow is large and low in water. The...
  • 【SAFE AND DURABLE】Applied with multiple protection devices, every piece goes through strict tests to ensure 100% safe. Inner water and electricity...
  • 【ECO & ELECTRIC & WATER SAVING】 Safe heater, save up to 55% on your electric cost, water saving, no pollution, no exhaust gas.The heating of the...
  • 【USE EXPERIENCE】30-55℃ (Considering the use environment in severe cold areas may not reach the maximum temperature of 55℃) .When the inlet...
Bestseller No. 4
Ecosmart POU 3.5 Point of Use Electric Tankless Water Heater, [email protected], 6 x 11 x 3 Inch
  • Can provide hot water for one sink at 0.5 GPM in warmer climates
  • Requires 1 x 30 amp breaker and 10 AWG wire
  • For one sink at 0.5 GPM in colder climates the POU 6 is recommended
  • Amperage Draw 29 amp. kW - 3.5 kW
  • Connection Fittings 1/2" NPT
Bestseller No. 5
Rheem 6kW 240V Point of Use Tankless Electric Water Heater
  • Push-button ON/OFF control with LED temperature display
  • 6 kW Model Flow Rate: up to 1.0 GPM
  • Perfect for 1 or 2 sinks
  • Bottom 1/2" NPT water connections
  • On demand, consistent and continuous hot water
Bestseller No. 6
3000W Mini Water Heater 110V Electric Tankless Instant Hot Water Heater Thermostatic Washing Heating...
  • 【Safe to Use】Our domestic tankless electric water heaters have been rigorously tested and have multiple protection functions: water and...
  • 【Instant Heating & Constant Temperature】3000W high-efficiency output mini water heater, fast heating in 3 seconds, constant temperature to...
  • 【Easy to Install】The home water heater has a mini body, easy to install in the bathroom, kitchen, and under the sink.Standard 1/2 interface(inflow...
  • 【Application】Comfortable water temperature, suitable for washing food, bowls, clothes, face, hands, etc. (Only suitable for summer showers)
  • 【Health Care】Washing hands and face frequently with hot water can effectively prevent various diseases such as colds and make the body healthier....
Bestseller No. 7
Mini Electric Tankless Water Heater - 3000W 110V Small Instant Hot Water Heater with LCD Digital...
  • Heating Water in 3s: When the water passes through the unit, 3000W output tankless electric water heater will heat in 3 seconds, saving your water...
  • Wide Applications: Suitable for universal water pipe: 1/2 inch diameter (inflow or outflow),110V;US Plug. Install the small instant hot water heater...
  • Safe Automatic Power-Off: Automatic power-off when inactive state, over temperature, leaking. And stop heating without water flow, save your...
  • Easy to Install: Just install the small water heater on a shelf, wall or bracket under the bathroom or kitchen sink; connect the water pipes up and...
  • Mini Water Heater: Install it below the sink, small size saving you space under the sink. Size: 7.87x 5.12 x 2.56". Mini Tankless Water Heater is the...
SaleBestseller No. 8
Stiebel Eltron 233219 2.5 gallon, 1300W, 120V SHC 2.5 Mini-Tank Electric Water Heater
  • Plugs into standard 120 volt outlet
  • T and P valve included
  • Wall-mounted with included bracket
  • Glass-lined tank and fast recovery
  • 6-Year warranty on tank
Bestseller No. 9
Airthereal Electric Tankless Water Heater, 9kW, 240Volts - Endless On-Demand Hot Water - Self...
  • ☼ Endless Hot Water: Imagine you are the last one in your family to take a shower before heading out for the day. You turn on the faucet and the...
  • ☼ Save Space: That water heater in the basement or utility closet takes up a ton of space. This wall-mounted water heater uses 90% less space than a...
  • ☼ Save Energy: Water is only heated when you need it, not stored in a hot water tank. The self-modulating temperature technology only uses energy to...
  • ☼ Important Note: In order to install 9kW Electric Tankless Water Heater it would requires 240 Voltage, 40 AMP Circuit Breaker Size. Please check to...
  • ☼ Safe To Use: With high temp protection, dry heating protection, and electrical leakage protection you can rest easily knowing you have safe,...
Bestseller No. 10
Mini-Tankless Water Heater, 3000W 110V One-click Heating, Electric Instant Water Heater with...
  • [Specifications]: Rated voltage: 110V Rated power: 3000W Plug: American plug Current: 27-32A, the trip switch is greater than 32A, and the wire within...
  • [High efficiency and energy saving] Water temperature is adjusted by water flow, 30°C ~ 55°C. Constant temperature based on automatic intelligent...
  • [Multiple safety protection]: Safety grounding. The water heater is equipped with automatic power-off protection to prevent leakage, over-temperature,...
  • [Self-diagnosis] There are water inlet and outlet temperature sensors. If the sensor fails, the system will automatically stop heating and display the...
  • [Satisfied after-sales service] If you have any questions, you can contact us by email, and the customer service will give you a satisfactory answer...
Bestseller No. 11
Bosch Thermotechnology 7736505871, 9.5kW, Bosch US9-2R Tronic 3000 Electric Tankless Water Heater,...
  • ELECTRIC TANKLESS WATER HEATER: 9.5 kW under-sink tankless water heater designed to provide an endless supply of instantaneous hot water to one or...
  • FLEXIBLE INSTALLATION: Can be installed in a 360 degree orientation so you can position the unit in tight under counter spaces for a flexible,...
  • EFFICIENT DESIGN: Ultra compact and lightweight design with 98% efficiency and no stand-by heat loss plus does not require a temperature or pressure...
  • DURABLE PLASTIC CONSTRUCTION: Roundagon Bosch DNA design provides a modern look that blends in seamlessly with existing decor when installed in a...
  • IDEAL SIZE: Measures 6.6" x 12.8" x 2.9", making it the perfect size for light commercial applications such as shopping malls, airports, stadiums and...
SaleBestseller No. 12
Ecosmart ECO 36 36kw 240V Electric Tankless Water Heater
  • Sleek and compact design with digital output temperature display
  • ECOSMART tankless water heaters are 99.8-percent energy efficient
  • Manufactured in United States
  • Pipe Fittings:3/4 inch NPT
  • Required Breaker:4 x 40 A
Bestseller No. 13
Mini Electric Hot Water Heater,3KW Tankless Instant Warm Water Heater with LCD Display Adjustable...
  • ★【INSTANT HEATING】It is an efficient mini water heater can heat water in three seconds with the 3000W high efficiency output. The tankless...
  • ★【THER-MOSTAT WATER HEATER】The temperature of the tankless water heater can be adjusted between 95 °F and 113°F. The ther-mostat water heater...
  • ★【VARIOUS PROTECTIONS】Each product has been rigorously tested and has protection functions such as leakage protection, IPX4 waterproof, dry...
  • ★【WIDE APPLICATION】Mini water heaters require 1/2-inch diameter water pipes(Inflow or Outflow), which is best installed vertically under the...
  • ★【GUARANTEE】We are committed to providing you with high-quality customer service. Please feel free to tell us if you have any questions. We will...
Bestseller No. 14
3000W Tankless Mini Hot Water Heater Under Sink 110V Thermostatic Washing Heating System with Remote...
  • 【Safe to Use】Our tankless electric water heaters have been rigorously tested and have multiple protection functions: water and electricity...
  • 【Instant Heating & Constant Temperature】3000W high-efficiency output mini water heater, fast heating in 3 seconds, constant temperature to...
  • 【Easy to Install】The home water heater has a mini body, easy to install in the bathroom, kitchen, and under the sink.Standard 1/2 interface(inflow...
  • 【Application】Large color digital display,comfortable water temperature, suitable for shower, washing food, bowls, clothes, face, hands, etc.
  • 【Health Care】Washing hands and face frequently with hot water can effectively prevent various diseases such as colds and make the body healthier....
Bestseller No. 15
LQWY Mini Electric Tankless Water Heater 3000W 110V Instant Hot Water Heater with Remote Control...
  • INSTANT HOT WATER HEATER - Applied with 5500W heating system, the electric tankless water heater supplies instant hot water, 5-10 seconds to get hot...
  • REMOTE CONTROL OR TOUCH SCREEN - Ultra slim and smooth appearance design, beautiful and elegant. The temperature can be adjusted by remote control and...
  • SAVE SPACE AND ENERGY - Compact design, our tankless Hot Water Heater is only the size of a small suitcase, and the wall-mount design frees up...
  • EASY TO INSTALL - The home water heater has a mini body, easy to install in the bathroom, kitchen, and under the sink.Standard 1/2 interface(inflow or...
  • SAFE TO USE - With high temp protection, dry heating protection, and electrical leakage protection you can rest easily knowing you have safe,...
Bestseller No. 16
Tankless Water Heater Electric 5.5kw 240V, ECOTOUCH Point-of-Use Hot Water Heater Digital...
  • 【INSTANT & SUFFICIENT HOT WATER】Applied with 5.5KW heating system, the electric water heater supplies instant, consistent and endless hot water of...
  • 【SMART SELF ADJUSTMENT】The hot water heater adjusts power input based on flow rate and temp setting in real time. For example, less power will be...
  • 【CONVENIENT USE】The tankless water heater comes with digital display & touch control panel so temp setting is easy job. Now turn on the tap and...
  • 【SAFE and DURABLE】Applied with multiple protection devices, every piece goes through strict tests to ensure 100% safe. Inner water and electricity...
  • 【POINT of USE】The sleek tankless water heater is compact as an oatmeal box, making it possible to install anywhere close to outlet and avoid...
Bestseller No. 17
Stiebel Eltron 200067 DHX 3.5-1 Trend Point-of-Use Tankless Electronic Water Heater, 120V, 3500...
  • Direct coil heating system; 3i Technology: Flow sensor, inlet and outlet temperature sensors
  • Fully electronic temperature control; LCD screen and digital temperature adjustment
  • Self-modulating energy saving technology; Adjustable output temperature from 68 - 140 F
  • Selectable anti-scalding limits of 109, 122, or 131 F; Integrated AE3 safety system
  • IP 24 water resistance rating; Can be used as a booster
SaleBestseller No. 18
vinmax 2021 Hot Tankless Water Heater,110V Electric Hot Water Heater - Kitchen Household Electrical...
  • ✅【Electric Water Heater】- The Temperature can be adjusted between 55℃-75℃ optionally, and the power will be off automatically when the set...
  • ✅【 Instant Hot Water Heater Under Sink】- Its total power is 1500w and it has multiple installation methods. It is applicable for different water...
  • ✅【Rv Tankless Water Heater】- This mini tankless water heater electric 110v product uses green environmental material, which is qualified for...
  • ✅【Water Heater Blanket】- This water pre heater is a lightweight electric water heater with a perfect combination of inner quality and classical...
  • ✅【Water Heater Electric】- It can be installed in the kitchen, rest room, bathroom or any other places you want optionally because of its...
Bestseller No. 19
Water Heater, Tankless Electric Water Heater Portable Wall Mount Instant Heating Hot Water With LCD...
  • 💦【SPECIFICATIONS】Rated voltage: 110V Rated power: 3000W Plug: American plug current: 25-32A Heating material: 304 stainless steel Water...
  • 💦【SAFETY DESIGN】The heater has leakage protection, IPX4 waterproof design, dry heat protection, water and electricity isolation, automatic...
  • 💦【STANDARD 1/2 INTERFACE】Standard 1/2 interface, which can be directly connected to household conventional hose connectors/faucet metal...
  • 💦【LCD DISPLAY】Stainless steel housing, with LCD digital temperature display, the unit is Celsius °C. The water temperature can be adjusted...
  • 💦【PROFESSIONAL SERVICE】If you have any questions or if you receive unqualified or damaged products, please contact us timely and we will handle...
Bestseller No. 20
2400W Electric Tankless Water Heater, 120VAC
  • Price For: Each Includes: Compression Fittings, Faucet Flow Controls Item: Electric Tankless Water Heater Features: 99% Energy Efficient, Compact...
  • Water Connection: 3/8" Compression Height: 6-1/4" Standards: UL, IAMPO, HUD, ADA Depth: 2-3/4" Pressure Range: 25 to 150 psi Water Heater Design:...

Having trouble finding a great under sink tankless water heater?

This problem is well understood by us because we have gone through the entire under sink tankless water heater research process ourselves, which is why we have put together a comprehensive list of the best under sink tankless water heaters available in the market today.

After hours of searching and using all the models on the market, we have found the best under sink tankless water heater for 2022. See our ranking below!

How Do You Buy The Best Under Sink Tankless Water Heater?

Do you get stressed out thinking about shopping for a great under sink tankless water heater? Do doubts keep creeping into your mind?

We understand, because we’ve already gone through the whole process of researching under sink tankless water heater, which is why we have assembled a comprehensive list of the greatest under sink tankless water heater available in the current market. We’ve also come up with a list of questions that you probably have yourself.

John Harvards has done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for under sink tankless water heater that you consider buying. Your questions might include the following:

  • Is it worth buying an under sink tankless water heater?
  • What benefits are there with buying an under sink tankless water heater?
  • What factors deserve consideration when shopping for an effective under sink tankless water heater?
  • Why is it crucial to invest in any under sink tankless water heater, much less the best one?
  • Which under sink tankless water heater are good in the current market?
  • Where can you find information like this about under sink tankless water heater?

We’re convinced that you likely have far more questions than just these regarding under sink tankless water heater, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for under sink tankless water heater, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible under sink tankless water heater. Make sure that you are only using trustworthy and credible websites and sources.

John Harvards provides an under sink tankless water heater buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information.

How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available under sink tankless water heater currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

  1. Brand Value: Every brand of under sink tankless water heater has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an under sink tankless water heater?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your under sink tankless water heater.
  5. Customer Ratings: Number ratings grade under sink tankless water heater objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their under sink tankless water heater.
  7. Product Quality: You don’t always get what you pay for with an under sink tankless water heater, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an under sink tankless water heater is should be an indication of how long it will work out for you.

John Harvards always remembers that maintaining under sink tankless water heater information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding under sink tankless water heater is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly!

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FAQ:

Q: What is the best under sink water heater?

A: Compact for under-sink mounting Just enough water for handwashing The button placement is not intuitive

Q: How many BTUs does a tankless water heater use?

A: Whereas the industry standard water heater tank uses 36,000 BTU, the average tankless water heater requires anywhere from 150,000 to 200,000 BTU. The reason is that tankless water heaters need to get the water up to temperature almost instantaneously. To do that, it requires a very high volume of gas.

Q: What is the best electric hot water tank?

A: – High energy-efficiency and first-hour ratings for optimal hot water use – Incoloy stainless steel – 4500w heating elements – Glass coating and diffuser tube for longer service and maximum hot water output – Durable and secure brass drain valve

Q: How do you fix an electric water heater?

A: Turn off the breaker to the water heater’s circuit in the service panel. Remove the access panel for the upper heating element on the water heater. Remove the insulation and the plastic safety guard,being careful not to touch any wires or electrical terminals.