Being able to bathe in hot water is a massive pleasure to anyone and tankless water heaters are perfect for that. Not only are they extremely efficient, but they are also portable regardless of your house space.

With the right tankless water heater, you spend less on electricity bills and get a more reliable supply of hot water. The water flow will also be more consistent, so there will be fewer interruptions.

Nonetheless, not all tankless water can give you the satisfying performance you are looking for. They will always differ in quality. This is why the five water heaters featured here were reviewed by our team of experts. Chosen for their wonderful features, premium materials, and ease of use, you would definitely not need to waste time anymore rummaging the endless list in the market. 

Once you are ready and have found the best choice, be sure to click the buttons below to see their best deals on Amazon! With that, here are five of the best options that we rounded up especially for you.

Best Tankless Water Heaters Comparison & Rating

Tankless Water Heaters

Features

Tankless Water Heater, GASLAND Outdoors BE158 1.58GPM 6L Outdoor Portable Gas Water Heater, Propane Water Heater, Overheating Protection, Easy to Install, Use for RV Cabin Barn Camping Boat, White
  • flame-failure and anti-freezing features
  • 1.58 gallons of water per minute
  • adjustable heat and water flow
Tankless Water Heater Electric 5.5kw 240V, ECOTOUCH Point-of-Use Hot Water Heater Digital Display,Electric Instant Hot Water Heater with Self-modulating,Overheating Protection,White
  • 5.5 kW heating system
  • hot water goes up to 116 F
  • digital display and settings
Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray
  • simple dial controls
  • self-modulating power control
  • 5.9 GPM flow rate
Stiebel Eltron Tankless Water Heater – Tempra 24 Plus – Electric, On Demand Hot Water, Eco, White, 20.2
  • maintains water temperature
  • small and sleek design
  • auto-modulation
Titan Electric Tankless Water Heater
  • 220 V and 54 Max amps
  • up to 60% energy saving 
  • most popular model for average size homes

1. GASLAND Tankless Water Heater

Tankless Water Heater, GASLAND Outdoors BE158 1.58GPM 6L Outdoor Portable Gas Water Heater, Propane Water Heater, Overheating Protection, Easy to Install, Use for RV Cabin Barn Camping Boat, White
Specifications:
96% Overall

Dimensions

11.8 x 6.1 x 17.3 inches

Weight

15.71 pounds

Color

White

Material

Copper, Steel

96%
Heating speed
95%
Performance
97%
features
94%
durability
Pros:
  • Portable and easy to carry around.
  • Approved for safe use by the CSA.
  • Comes with flame-failure and anti-freezing features.
  • Good for use when camping, going to the beach, or showering outdoors.
  • Quick to install and easy to detach.
  • No need to preheat to get endless hot water.
  • Produces 1.58 gallons of water per minute.
  • The heat and water flow are fully adjustable.
Cons:
  • Requires gas to function, but a small tank is often enough.
Final Take:

This is a fantastic tankless water heater to have at home. You can bring it anywhere and use it regardless of the conditions. As long as you have a gas tank, you can have both hot and cold water to suit your needs. The dials are also easy to manipulate so that you can have the exact temperature that you want. The compactness of the heater makes it easy to carry around, as well. You could use this both inside and outside for maximum versatility.

2. ECOTOUCH Tankless Water Heater

Tankless Water Heater Electric 5.5kw 240V, ECOTOUCH Point-of-Use Hot Water Heater Digital Display,Electric Instant Hot Water Heater with Self-modulating,Overheating Protection,White
Specifications:
94% Overall

Dimensions

4.3 x 10 x 4.4 inches

Weight

6.29 pounds

Color

White

Material

Glass

93%
Heating speed
95%
Performance
92%
features
97%
durability
Pros:
  • Comes with a 5.5 kW heating system.
  • Supplies instant, consistent, and endless hot water.
  • The hot water goes up to 116 F.
  • The power input is adjusted based on the flow rate.
  • Features an energy efficiency of up to 98%.
  • Comes with a digital display and settings.
Cons:
  • The instructional manual is a bit vague, but the installation itself is easy.
  • The initial flow of water can be quite hot, but it lessens as the water flows.
  • The temperature could take seconds to adjust.
Final Take:

When it comes to tankless water heaters that will do their job perfectly, this fits the bill. You only need to hook this up to a 30amp double pole breaker for the best results. After that, you can get a lot of hot water at a consistent flow rate. The pressure of the water is impressive, as well, with a reliable flow rate of <1 GPM. If you want to hook this up yourself, a 10 gauge wire would be recommended.

3. Rheem RTEX-24 24kW 240V Electric Tankless Water Heater

Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray
Specifications:
94% Overall

Dimensions

18.25 x 3.5 x 17.63 inches

Weight

17.8 pounds

Color

Gray

Material

Steel

97%
Heating speed
94%
Performance
93%
features
91%
durability
Pros:
  • Comes with simple dial controls.
  • Features a self-modulating power control.
  • Provides excellent power at 24 kW.
  • Provides a reliable flow rate of 5.9 GPM.
  • Comes with bottom 3/4" NPT water connections.
  • Offers a consistent supply of hot water.
Cons:
  • Familiarity with installing breakers and running wire is required for DIY installation.
  • The faucet temperature can be a few degrees lower than the output temperature.
Final Take:

If you need hot water at a reliable rate, this is the tankless water heater for you. It works so well in keeping the temperature consistent. When you have the right size, you never have to worry about any sudden dip to interrupt your shower. Installing this heater is also easy if you have the right knowledge. For those living in cold areas, the delay in reaching adequate hotness is only around 10 to 15 seconds.

4. Stiebel Eltron Tankless Water Heater

Stiebel Eltron Tankless Water Heater – Tempra 24 Plus – Electric, On Demand Hot Water, Eco, White, 20.2
Specifications:
91% Overall

Dimensions

4.63 x 16.63 x 14.5 inches

Weight

1 pound

Color

White

Material

Copper

93%
Heating speed
91%
Performance
90%
features
91%
durability
Pros:
  • Patented technology automatically maintains water temperature for guaranteed comfort.
  • Water flow is limited if too much hot water is used beyond the capacity.
  • Hot showers are never interrupted.
  • Comes with a small and sleek design for saving space.
  • Feature auto-modulation for eco-friendliness.
  • A reliable 24kW, 240V model.
Cons:
  • The installation will require a lot of fiddling, but the steps are easy to follow.
  • The water takes a moment to heat up.
Final Take:

This is a reliable tankless water heater that provides you with endless hot water. It’s known to last up to 10 years, which shows how durable it is. Once the water reaches your preferred temperature, it will stay that way. By regulating the water flow if the demand exceeds the supply of hot water, the flow itself won’t be interrupted. Even when the water turns freezing, it has no problem maintaining the right temperatures.

5. Titan Electric Tankless Water Heater

Titan Electric Tankless Water Heater
Specifications:
90% Overall

Dimensions

4.8 x 9.6 x 12 inches

Weight

7.93 pounds

Color

White

Material

Copper

91%
Heating speed
90%
Performance
89%
features
90%
durability
Pros:
  • Runs at 220 V and 54 Max amps.
  • Saves a lot of space.
  • Perfect for average-sized homes.
  • Great for providing an endless supply of hot water.
  • Energy savings can be up to 60%.
  • Easy to install and great for DIY.
Cons:
  • Not suitable for larger homes.
Final Take:

This is a fantastic tankless water heater that is just perfect for large apartments or medium-sized houses. It only takes a few seconds to completely heat up, even in the dead of winter. The supply of hot water is never interrupted, as well. You can even connect this with multiple lines and still get a good temperature. Installing it yourself can be done too, but having a professional do it can lead to better results.

Best Tankless Water Heaters - Buyer's Guide

type

The different types of tankless water heaters can depend on the qualifications used. In the case of how the water is heated, for example, there are the condensed and the non-condensed varieties. Then there are the indoor and outdoor tankless water heaters. Apart from those, there are also fixed and portable water heaters. Keep those types in mind before making your purchase.

size

Tankless water heaters will differ in size based on where they will be installed, how much water they can hold, and how much space you have. Bigger water heaters will typically only be necessary for large houses and apartments. Even smaller or average ones should be enough, especially in temperate areas.

speed

How fast a tankless water heater can heat up water will depend on its power and capacity. Even ones meant to heat the water as it goes will require some time to power up, especially if you turn it off after every use. The best ones shouldn’t take more than a few minutes, though, while low-quality heaters can take much longer.

features

One of the most basic features that a tankless water heater should have is the ability to control the temperature. Not everyone has the same tolerance for heat, after all. On/off, buttons should be available, as well, and the appropriate control interface to go along with it.

installation

You shouldn’t have any trouble installing tankless water heaters yourself since they are designed to be convenient. The only one that should come with issues is the version that is powered by gas. That one will require you to also connect it with the propane tank tube, but it’s just one extra step. If the heat seems too difficult to install, you can have a professional do it.

Best Tankless Water Heaters - FAQs

What are the advantages of tankless water heaters over tanked ones?

One of the biggest advantages of tankless water heaters of their older counterpart is that you save space. This item is smaller and more compact, so even smaller homes can accommodate them. They also tend to last longer and are more energy-efficient. As such, you can save on your electricity bill.

Does size affect tankless water heaters?

The size of a tankless water heater will affect its capacity and efficiency of providing a constant jet of hot water. It will also affect the water flow, so if you are someone who likes to take long, hot showers, you need bigger ones. On that note, bigger water heaters will also take up more space and can affect how easy or hard they are to install.

Should I get portable water heaters?

Portable water heaters tend to have smaller capacities than their fixed counterparts. However, they make up for this by allowing you to take them anywhere. You will likely need to have a power source on hand, but there are some brands that are battery-powered. Naturally, the latter would be more limited in use.

Can tankless water heaters produce drinkable water?

Water heaters that are meant for bathing were never designed to produce drinking water. As such, it would be advised to avoid using it for such. While it can be drunk in a pinch, this should only be used during emergencies. The hot water that is produced is harmless to the skin, but the internal mechanisms are not the best conduits for potable water.Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et nam dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco nam laboris nisi ut aliquip ex ea commodo consequat.

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