We consider a high efficiency water heater to be a worthy investment in the long run. In the following post, we will help you to select the best high efficiency water heaters.

Our review process: Show/Hide

Our Top Picks:

Best Overall: Buy: Bosch Rmotechnology High Efficiency Water Heater READ REVIEW

Best With Furnace: Buy: Rinnai Tankless Water Heater READ REVIEW

Best For Stainless Steel: Buy: Camplux Enjoy Outdoor Life High Efficiency Water Heater READ REVIEW

Best For Temperature Control: Buy: Rinnai High Efficiency Water Heater READ REVIEW

Best With Electric: Buy: Camplux Enjoy Outdoor Life Hot Water Heater READ REVIEW

Best For Overall Length: Buy: Ez Tankless High Efficiency Water Heater READ REVIEW

Best For Space Saving: Buy: Takagi Tankless Water Heater READ REVIEW

Best For Fast Delivery: Buy: Rheem High Efficiency Water Heater READ REVIEW

Best For Energy Conservation: Buy: Takagi High Efficiency Water Heater READ REVIEW

Best Overall: Bosch Rmotechnology High Efficiency Water Heater

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The Bosch Rmotechnology High Efficiency Water Heater is long-lasting, rigid and fits well with your daily use like a dream. The bosch rmotechnology high efficiency water heater heats up quickly and it is practical. Make sure this fits by entering your model number. Also, it is elegant and it is perfect for horizontal installation.

The heater heats water fast, heats quickly and it is good for long showers. In addition, the heater allows for hot water supply and it is very efficient. Lastly, the bosch rmotechnology high efficiency water heater is made for gallon size, is great for free returns and it is easy to read.

Almost all buyers found that the heater is especially true in the complicated 120v/12v combo electrical systems in an rv. Also, a few strongly agree that the heater is easy to hardwire to an existing outlet, which is much safer. Moreover, they say that the new heater is integrated with the tankless system it works great.

• It is so nice to have hot water in the winter, and year round.
• This is bigger capacity than the original.
• This provides for a comfortable hot shower.
• This is a glass - lined insulated tank.

Best With Furnace: Rinnai Tankless Water Heater

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The Rinnai Tankless Water Heater is capable of outshining several other heaters featured in this list in overall features for the price point. The rinnai tankless water heater saves space and has a standing design. The Manufacturer says: Rated by a uniform energy factor (uef), our tankless water heaters are highly energy efficient, saving you from expensive power and water costs. This ru199in compact tankless water heater has a longer lifespan since water runs continuously through pipes.

Most importantly, the rinnai tankless water heater is compatible and has a cool design.

Most buyers quickly discovered that the heater would use 199, 000 btu *as well as* limit the maximum flow rate to about 4.5gpm. In addition, they say that the heater has a really great customer service group. In addition, they say that the heater is "wi-fi capable" but you have to buy a separate module to be able to control it with a smart device. To sum up, the tone of buyers is very positive and we believe that the heater suits the purpose.

• This is for natural gas, "p" is for propane gas.
• This is running frequently, something may be triggering it.
• This will vary both btu and water flow rate depending on conditions and demand.
• This can be used in residential settings anymore, maybe new energy standard requirements.

Best For Stainless Steel: Camplux Enjoy Outdoor Life High Efficiency Water Heater

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The camplux enjoys outdoor life. The high efficiency water heater's material feels more premium than its price would suggest. The camplux enjoys outdoor life. High efficiency water heater is used for constant temperature, works great, It has enjoyed outdoor life and has a safe design. . And, it piping hot water, never runs out, it works great and has a cool design.

The heater is clear, it is ready to install and has a compact design. Also, it works like a charm, is commercial, it is best for digital display and has a water heater design. Most importantly, the camplux enjoys outdoor life. High efficiencywater heater works perfectly, it buy again and has an efficient design.

Most customers quickly discovered that the heater is an indoor unit, so day - to - day use doesn’t require freeze protection. Furthermore, a few also found that the heater comes with a horizontal stainless steel vent pipe. It can also be installed in the outdoors. And, they say that this heater would cost 4 times this amount at either store. Overall, many buyers have used the camplux enjoy outdoor life, high efficiency water heater for more than a few months without any complaints, and it shows no sign of giving up.

• This works well for indoor installing.
• This has features for indoor applications.
• This is kind of early review.
• This has been a troublefree water heater and I highly recommend it.

Best For Temperature Control: Rinnai High Efficiency Water Heater

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Compared with other heaters in this category, the Rinnai highefficiency water heater has a convenient design. The Rinnai high efficiency water heater is effective and has a controller design. . And, the heater is black, it has used pex and has a safety design.

The heater is great for cost savings, is very happy, it is clear and has a waterheater design. And, the heater works well for off-grid, It makes for a highly efficient unit and has an efficient design. Finally, the Rinnai High Efficiency Water Heater heats water fast, it never runs out and has a standing design.

Most buyers quickly discover that the heater is not rated for it, it will void the warranty. Also, a few strongly agree that the heater is a lower end indoor gas unit and it works fine. And, a few say that the tankless water heater has enough capacity to heat the area that it is servicing. In short, most customers call the heater suits best, and no one questions it.

• This works well and support is reliable.
• This is powered by 120vac and is only on when the unit is running.
• This is designed to run off of a tank sized for the whole house.
• This looks to be a condensing unit.

Best With Electric: Camplux Enjoy Outdoor Life Hot Water Heater

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If you often find yourself scrambling for a convenient and suitable heater, camplux enjoy outdoor life, a hot water heater should be your first option for buying. The Camplux enjoys outdoor life. The hot water heater allows for hot water output, is affordable, it is made for very good quality and has an innovative design. The manufacturer says: With the most advanced technology in water heating, our tankless water heaters can save you up to 50 percent on water heating costs. The 5.28 gpm camplux residential tankless water heater supplys on - demand comfortable constant hot water for residential whole home use.

The heater can be of good quality, It is very hot and has a compact design. Above all, the camplux enjoys outdoor life. The hot water heater looks nice, it has enjoyed outdoor life and has a controller design.

Almost all customers quickly discovered that the heater came with a similar regulator and hose. Further, a few say that the heater has an element that keeps it from freezing, but if you're going to leave it unattended it suggests that you drain it, which is easily accomplished.

• This features pcb frequency conversion, intelligent control, temperature intelligent adjustment ensures comfortable constant hot water.
• This is easy to install and understand the digital read out.
• This is fully automatic, allows for good flow, it is installed easily and has a safe design.
• This is constantly expanding, so a keen eye out for quality, innovative products.

Best For Overall Length: Ez Tankless High Efficiency Water Heater

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Ez Tankless makes beautiful and great heaters with classic and higher-grade materials. The Ez Tankless High Efficiency Water Heater is an easy to understand advanced technology display. A tankless heater can eliminate a large portion of your home's stand-by energy loss, which saves precious energy and money. The ez ultra waterheater is designed for use in up to a 2 - bath home.

The heater is unlimited, it is clear and has a safe design. Finally, the ez tankless high efficiencywater heater is white and it has used pex.

Almost all buyers opine that the heater is more than enough to hold the entire drain volume. And, they strongly agree that the heater is providing more than ample hot water for a one and half bath house in Seattle currently. And, they also found that the heater is good for a quick 10. Without any doubt, this product passed the test and had very satisfied buyers eager to share their experience.

• Capacity up to 3.4 gpm @ 45f rise in ambient temperature.
• can be answered by asking yourself a few simple questions.
• This comes with the ability to vent using a 2" sch.
• This works perfectly, It is perfect for space savers and has a controller design.

Best For Space Saving: Takagi Tankless Water Heater

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The Takagi Tankless Water Heater's superior materials make sure that it ages well with use. The takagi tankless water heater is easy to follow and it is designed for easy installation. Make sure this fits by entering your model number. And, it comes with gas inputs of 160, 000 btu, The t-h3j can produce enough hot water for two bathrooms in warmer climates or 1.5 baths in colder climates.

The heater features, no pilot light to have to worry about. And, it is handy and it is built for quiet use. Most importantly, the takagi tankless water heater is for washing machine and it can protect for recirculation pump.

Most buyers agree that the heater is used for radiant floor heating. Moreover, a few say that the heater comes with PVC connectors. In short, the tone of buyers is very positive and we believe that the heater suits the purpose.

• Satisfies the 2012 scaqmd rule 1146.2 for ultra-low NOX emissions.
• This is more than offset by rebates and tax credits.
• This comes with the vent assembly.
• This works well for low temperatures and it comes with a warranty card.

Best For Fast Delivery: Rheem High Efficiency Water Heater

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We would, of course, be remiss if we didn't mention a high - efficiency water heater for daily use. The Rheem High Efficiency Water Heater is used for small compact and it is very hot. By using less energy, these tankless water heaters can save you on expensive operating costs compared to a standard 50. And, this can be used with up to 5 bathrooms depending on the inlet temperature.

Lastly, the rheem highefficiency water heater provides instant hot water but also only provides it when needed.

Most customers agree that the heater is a natural gas unit.

• This is enabled, water waste is reduced by up to 1, 100 gallons per year.
• Saving valuable space in your home.
• Check the approximate usage of your region in the table.
• This is very happy and it has saved time.

Best For Energy Conservation: Takagi High Efficiency Water Heater

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The Takagi High Efficiency Water Heater should be able to handle its purpose and duties with ease. The takagi high efficiency water heater is great for space saving and it can be lit for energy conservation. Make sure this fits by entering your model number. And, the heater comes with gas inputs of 160, 000 btu, The t-h3j can produce enough hot water for two bathrooms in warmer climates or 1.5 baths in colder climates. Above all, the takagi high efficiency water heater features, no pilot light to have to worry about.

• Endless hot water, on-demand usage, compact, space saving, energy conservation.
• Satisfies the 2012 scaqmd rule 1146.2 for ultra-low NOX emissions.
• Good brand reputation.