With our tankless water heater ratings, you can compare units side by side using our Head To Head tool.
You can compare over 30 models from 24 brands in nine categories such as their cost, warranty, efficiency, water flowrate, & where they are made.
You can also read the individual reviews of each brand below.
Our simple rating system gives each brand a color code and a star rating. If the card is green, then, that is one of the top picks from HvacRepairGuy. If the card is yellow, then, that would be a budget pick from HvacRepairgGuy. If the card is red, then, the brand is not recommended by HvacRepairGuy. With our tankless water heater reviews you can cut through the sales hype and find value. It truly is like you were taking a repairman shopping with you! These reviews are for electric units.
This brand is made in China for West Ryder Technology LLC and the water heaters are available through their Amazon store but their warranty is not very good when compared to the other brands that are available. The Evening Tide (EVT) models are available in five sizes that are suitable for whole home use and they use accurate digital controls.
This brand is made in the USA by SW Corp and the water heaters are available through their website or Amazon store. The ENVO Atami models are available in four sizes. They are backed by an excellent warranty and they are reasonably priced.
This brand is made in the USA and they are only available through their limited dealer network. The ProLine water heaters are available in seven sizes from 14 to 32 KW and they feature digital controls with scale reduction technology as well as leak detection shutdown protection. They use standard electric water heater elements which are readily available and easy to replace but they have a lower water flowrate and their guarantee is not as good as other brands.
This brand is made in China and can be purchased through the Bosch Amazon store. The Tronic 6100C water heaters are available in two sizes and feature durable and hygenic stainless steel heat exchangers. They feature modulating element controls which closely match the heating to the requirements of the home but their guarantee is not as good as other brands.
This brand is made in the USA by Morris Group International and they are sold through a dealer network. The ER-TWINS Series offers four sizes of whole house water heaters with flowrates of either 3.0 or 4.25 gallons per minute. They have mechanical controls and a plastic heating chamber as well as a warranty that is not very good when compared to the other brands.
This brand is a part of Rheem Manufacturing and the ECO models are available in four sizes with flowrates from 1.8 to 3.6 gallons per minute. They feature a modulating control that monitors incoming water temperature, flowrate, and your desired temperature at a rate of 60 times per second and adjusts the power to closely match the heat required. The units use stainless steel heat exchangers and copper heating elements for durability with digital controls for accuracy. The units can be purchased through their Amazon store and they are backed by an excellent warranty but they require professional installation by a plumber/electrician.
This brand is a part of Rheem Manufacturing and is made in the USA. The HomeAdvantage II series offers four sizes of modulating water heaters to serve the whole house with flowrates of either 7 or 8 gallons per minute. They use durable copper elements with brass terminations but the units are only available through their limited dealer network and the guarantee on the units is not very good when compared to other brands.
This brand is made in China by GE Appliances which is a part of Haier and the units can be purchased on Amazon but their guarantee is not very good when compared to the other brands that are available. The GE27DNHPDG model features touchscreen controls and modulating capability to closely match the required heat for the water flow. The units have scale reduction technology but they use 240 volt power which makes them less easy to install.
This brand is made in Canada and is owned by AO Smith. The water heaters are sold through hardware and home improvement stores throughout Canada but their guarantee is not very good when compared to other brands. The SpaceSaver SSET-180E model features scale reduction technology and digital controls but they have a plastic heat exchanger and a maximum flowrate of only 1.8 gallons per minute.
These units are manufactured in the USA and can be purchased through their website but their guarantee is not very good when compared to other brands. The water heaters feature copper heat exchangers and stainless steel cases for durability. They use Shark-Bite water connections for ease of installation and use solid state electronic control. The 200 Series offers 3 sizes of heaters that include three heating elements and they are for the northern states while the 100 Series models have two elements and are suitable for the southern states. They offer flowrates of from 1.2 to 2.8 gallons per minute but they are rather expensive compared to other brands.
This brand is made in China for American Heat Manufacturer LLC which is a part of Drakken Industries. The AHS Series models feature durable stainless steel heat exchangers with copper heating elements and they have digital controls with modulating ability to closely match the water heating needs. The water heaters can be purchased directly through their website or Amazon store and they are backed by a very good guarantee. The units have a built-in USB port which allows for troubleshooting without even opening up the unit and they have a flowrate of up to 4 gallons per minute.
These units are made by GSW which is owned by AO Smith and the units are sold through a limited dealer network in Canada. The SpaceSaver SSET-180E model features scale reduction technology and digital controls but they have a plastic heat exchanger and a maximum flowrate of only 1.8 gallons per minute. Their guarantee is not very good when compared to other brands.
These water heaters are made in China and can be purchased through their website, Amazon store, or at The Home Depot but their warranty is not very good when compared to other brands. The water heaters feature durable and hygenic stainless steel heat exchangers as well as digital modulating controls which closely match the heat provided to the water being used. The ECO 180 model has a 4.4 gallon per minute flow rating while the ECO 240 has a 4.7 flow rate.
These water heaters are made in China and can be purchased through their Amazon store but their warranty is not very good when compared to other brands. The water heaters feature digital modulating controls which closely match the heat provided to the water being used. The RE18K model has a 4.3 gallon per minute flow rating while the RE27K has a 6.5 flow rate.
This brand is a part of AO Smith and is available at hardware stores. The water heaters are available in seven sizes from 14 to 32 KW with flowrates of from 2.4 to 5.5 gallons per minute. They feature digital controls with scale reduction technology as well as leak detection shutdown protection. They use standard electric water heater elements which are readily available and easy to replace but they have a lower water flowrate and their guarantee is not as good as other brands.
The Professional Classic RTEX water heaters are made in China and can be purchased through their Amazon store but their guarantee is not very good when compared to other brands that are available. They are available in four sizes from 18 to 36 KW for whole house operation and they feature digital controls with modulating ability so that they closely match the heat produced to the water demand. They use durable copper heating elements and have flowrates of up to 8.8 gallons per minute.
This brand is made in China for Rheem Manufacturing and is sold at many home improvement stores but their guarantee is not very good when compared to other brands that are available. The Essential Series RMTEX models are available in three sizes from 18 to 36 KW for whole house operation and they feature digital controls with modulating ability so that they closely match the heat produced to the water demand. They use durable copper heating elements and have flowrates of up to 8.8 gallons per minute.
These water heaters are made in China and can be purchased through their Amazon store but their warranty is not very good when compared to other brands. The RW126 model water heaters feature basic electro-mechanical controls that are not very accurate in controlling the temperature and they have a relatively low 2.9 gallons per minute capacity.
This brand is made in the USA and is backed by a pretty good guarantee but they are only sold through a limited dealer network. The RA models feature their powershare technology which allows for installation in most homes with a 200 amp electric service without an upgrade to the home's electrical system. The units feature digital control with leak detection shutdown and they are available in six sizes from 14 to 32 KW with flowrates of 2 to 6 gallons per minute. The water heaters have a plastic heat exchanger which is not as durable as brands that use stainless steel.
This brand is a part of AO Smith and is only sold through a limited dealer network. The R Series water heaters are available in seven sizes from 14 to 32 KW with flowrates of from 2.4 to 5.5 gallons per minute. They feature digital controls with scale reduction technology as well as leak detection shutdown protection. They use standard electric water heater elements which are readily available and easy to replace but they have a lower water flowrate and their guarantee is not as good as other brands.
This brand is made in Germany and can be purchased through their Amazon store but their warranty is not as good as some of the other brands. The brand features digital modulating control as well as durable copper heat exchangers. The water heaters are available in six sizes from 12 to 36 KW and with flowrates of up to 8 gallons per minute. The Tempra Plus models feature their patented advanced flow control where the unit automatically reduces the water flowrate to maintain the proper temperature when the system is operating at more than its maximum capacity. The Tempra Trend models do not have the advanced flow control feature and they are less expensive than the Plus models.
This brand is made in China and features units with digital modulating controls. They offer two models that are suitable for whole house water heating and they can be purchased directly through their website or Amazon store. In these water heaters, the heating element is separated from the water which reduces scale, corrosion and mineral buildup on the element for better performance and low maintenance. The guarantee on the units is not very good when compared to other brands that are available.
This brand is made in Mexico by Cypress Industries and is backed by a very good guarantee but the water heaters are only available through their limited dealer network. The Gen3 units have a durable copper heat exchanger and digital controls with leak detection shutdown as well as self flushing design to minimize maintenance while maintaining efficiency. The unit has four sizes in one unit with flowrates from 3.7 to 6.7 gallons per minute and it is field selectable.
This brand is made in China and can be purchased directly through their website or on Amazon but their warranty is not very good when compared to other brands. The JN18 models use cast aluminum heat exchangers for corrosion resistance and they have digital controls. The brand is marketed for the DIY community and they are very inexpensive but their warranty says that, if you install the water heater yourself, then the warranty is void.
This brand is made in China and can be purchased directly through their website or Amazon store but their warranty is not very good when compared to other brands. The WN 18 & 27 models feature digital modulating controls and built-in Wi-Fi connectivity.
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