World's Best Electric Tankless Water Heater:

Our top pick is from ECOSMART. These units are available in a wide range of sizes and are backed by a very good guarantee. They feature a modulating control that monitors incoming water temperature, flowrate, and your desired temperature at a rate of 60 times per second. The units can be purchased directly through the manufacturer's website.

Other Tankless Water Heater Ratings

We continue our tankless water heater ratings with an alphabetical list of manufacturers and reviews of their products. 

BRAND----------WEBSITE----------RATING

BOSCH----- bosch-climate.us -------<1*

The TRONIC 5000 is available in three sizes and features element modulation for energy savings. The guarantee on these water heaters is not very good when compared to other brands.

BRADFORD WHITE-bradfordwhite.com-<1*

The KWICK SHOT models are available in a variety of sizes and use durable NiChrome elements. The brand is only sold through dealers and their warranty is not very good when compared to other brands.

CENTON------centonia.com----------<1*

This brand is made in Malaysia by CENTONIA INDUSTRIES Sdn. Bhn. The multi point unit features a copper heat exchanger for durability, electronic controls, and a built in booster pump. The manufacturer's website is not much help and does not have a stated warranty policy.

EEMAX-------eemaxinc.com----------<1*

The HOMEADVANTAGE series offers six sizes of modulating water heaters. They have NPT fittings for easy solderless installation and use durable copper elements with brass terminations. The guarantee on the units is not very good when compared to other brands.

ECOSMART---ecosmartus.com---------5*

These units are available in a wide range of sizes and are backed by a very good guarantee. They feature a modulating control that monitors incoming water temperature, flowrate, and your desired temperature at a rate of 60 times per second. The units use durable stainless steel and copper components and can be purchased directly through the manufacturer's website.

GERMAN POOL--germanpool.com-----<1*

These water heaters are made in Germany and feature electronic modulating controls. They offer an optional wireless remote controller but the guarantee on the units is not as good as many other brands.

GE SHINI-------geshini.com------------<1*

This brand is made and sold in China. The units have electronic controls but their website is no help. 

HEATWORKS----myheatworks.com----<1*

This brand is from ISI TECHNOLOGY and features graphite electrodes instead of traditional elements. They are "smart"  and can be purchased directly from their website. The model 1 is designed to replace an existing tank type water heater while the 1X is to be added to an existing water heater system to increase the system capacity. The guarantee on the units is not very good when compared to other brands.

HUBBELL------hubbellheaters.com----<1*

These units are manufactured in the USA. The units are available in a variety of sizes and feature copper heat exchangers and stainless steel cases for durability. The units use press-fit water connections for ease of installation and use solid state electronic control. It is hard to understand why they do not offer a better warranty on the units especially on the heat exchanger.

iHEAT----------drakkenusa.com-------3*

The ADK M series features units with stainless steel heat exchangers for durability. They have digital modulating controls and are backed by a good warranty.

KOSPEL---------kospel.pl------------<1*  

This brand is made in Poland and is available in Europe. They offer a variety of units and sizes of units to fit the needs of most homes. The units feature copper heat exchangers and modulating control but their website is not much help and does not have a stated guarantee for their products.

MAREY-----------marey.com---------<1*

These water heaters are made in China. They offer a variety of models that use basic technology but the guarantee on the heat exchanger is not very good when compared to other brands.

MAXWELL------klimaire.com----------<1*

This brand offers a wide selection of models that feature microprocessor based controls and LED screens. Their website is not much help and does not have a stated warranty policy.

METRO THERM---metrotherm.dk------<1*

The METRO MINI 18 units have electronic controls but they use 400 volt three phase power and the guarantee is not very good. The brand is a part of the NIBE GROUP and the units are sold on Denmark, Sweden, Norway, & Finland.

MIDEA-----------midea.com----------<1*

This brand is made in China and features basic enameled tank technology. They use copper elements but their website is not much help and does not have a stated guarantee.

RHEEM----------rheem.com-----------<1*

The RTE 27 units feature modulating controls and durable copper heat exchangers. Their website is not much help and the guarantee on the electrical parts is not as good as other brands.

RICHMOND-richmondwaterheaters.com-<1*

This brand is made by RHEEM MANUFACTURING and is sold at many home improvement stores. The RMTE27 unit features a durable brass/copper heat exchanger and electronic modulating controls. They have compression fittings for easy installation but the warranty on parts other than the heat exchanger is not very good when compared to other brands.

SEISCO-------seisco.com---------------<1*

This brand offers two sizes of whole house water heaters with modulating controls. Their powershare technology allows installation in most homes with a 200 amp electric service without an upgrade to the home's electrical system. The units have durable polymer heat exchangers but the guarantee on the units is not very good when compared to other brands.

SIDFEN-----  sidfen-usa.com  ----------<1*

These water heaters are made in China and have durable copper tanks. They are available in three sizes and have electronic controls with push button temperature adjustment. Their website is not much help and does not have a stated warranty policy.

STIEBEL ELTRON stiebel-eltron-usa.com  <1*

The TEMPRA PLUS units feature advanced flow control technology and durable copper heat chambers. The brand is available worldwide but the warranty is not very good when compared to other brands.

SUPER GREEN-supergreentechnologies.com-<1*

This brand offers electric tankless water heaters that use quartz tubes instead of traditional heating elements. The NANO TECH THWG-8000 units have an intelligent controller and a capacity of up to eight gallons per minute. You can purchase them online directly from the manufacturer but the warranty is not very good when compared to other brands.

TANKLESS--tanklessheaters.com----<1*

This brand has a variety of units that feature durable stainless steel heat exchangers. Their website is not much help and the warranty is not very good when compared to other brands.

TECHNOTHERM---technotherm.de----<1*

The VARIOSELECT water heaters use 400 volt three phase power which is not readily available in homes in the USA. The units are made in Germany but their website does not have a stated guarantee for their products.

TERMODINAMIK-termodinamik.com.tr-<1*

These water heaters are made in Turkey. They are basic units with mechanical controls but they have three stages of operation. Their website is not much help and does not have a stated guarantee for their products.

THERMEX--------thermex.com--------<1*

This brand is made in Russia. The STREAM series units are available in three sizes and feature a copper heat exchanger for durability. They have two power modes for energy savings and electronic control but the warranty on the units is not as good as many brands.

TITAN----------titanheater.com-------<1*

This brand is from NIAGARA INDUSTRIES and can be purchased directly through their website. They use dual electronic controls for very good temperature control but the warranty on the units is not very good.

TRUTANKLESS------trutankless.com----3*

This brand is from BOLLENTE COMPANIES INC. The TR SERIES units are stand alone water heaters with durable stainless steel elements and touchscreen LED control. The TB SERIES units are designed to be used as a backup to solar water heating systems. The units can be controlled from a smartphone and are easily integrated into a home automation system. They are backed by a good warranty. 

VAILLANT----  vaillant-export.com  ---<1*

The VED E EXCLUSIV models feature electronic controls. Their website is not much help and does not have a stated guarantee for their products.

ZIP-------------zipwater.com-----------<1*

These water heaters are made in Germany by CLAGE and are sold in the U.K. and Australia. The C series offers models with a 5 liter/min flowrate while the D series offers a higher (8 liters/min) rate. The units are wall-mounted and have electronic controls. The warranty on the units is not very good when compared to other brands.

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