Updated October 2016. As technology continues to improve, tankless water heaters are becoming more efficient and increasingly popular. We delved into the world of tankless water heaters to find out which models are the most popular and which ones earned the highest ratings from consumers. We researched both electric and natural gas models to identify the very best ones available on the market today.
When considering a tankless water heater, be sure to take note of the specifications so you end up with a water heater that is powerful and efficient enough for your needs, as well as compatible with your plumbing and other utility configurations.
We focused on whole house tankless water heaters for this buying guide, as opposed to point-of-use units. Within that category, there is still a wide range of options and capacities available. Read on for the details of what we discovered in our buying guide.
Highest rated whole house tankless water heaters on Amazon
Customers on Amazon gave the highest rating to a water heater by Rheem. The other two tankless water heaters that received similar ratings are units from Seisco and Rinnai. Following closely behind in the Amazon ratings are several water heaters from Takagi and a few models by Stiebel. Another Rheem tankless unit is next in line, and the highest rated list is completed with four offerings from EcoSmart and another Steibel unit.
Bestselling whole house tankless water heaters on Amazon
Looking at sales data, Amazon customers favored units from Ecosmart much more than any other manufacturer of tankless water heaters; three of their models dominate the top of the best selling chart. Next in line is a Stiebel unit, followed by yet another Ecosmart model. A Takagi water heater is next on the list, followed by a string of six Rinnai tankless units. Finishing off the top seller list on Amazon are offerings from Stiebel and Bosch.
Bestselling whole house tankless water heaters at Wal-Mart
Taking a look at the top selling data from Wal-Mart, we find the most popular tankless water heater is a model from Stiebel. The next best-selling whole house tankless water heater at Walmart is an EcoSmart unit. Takagi, Marey and Rheem models follow up next on the bestsellers list. After that we see units from EchoSmart and Powerstar. Three more Rheem water heaters are next up, after which is a Takagi unit. The list is finalized with three other Rheem units and one more water heater from Takagi.
A theme we noticed when researching tankless water heaters for this buying guide is that each retailer appears to have a few brands they favor over the others. One of the more successful manufacturers across multiple outlets is Rheem. Others are Stiebel and EcoSmart. When choosing a tankless water heater for your home, be sure to take a look at the specifications to ensure it will provide adequate hot water for the size of your home. Also, take into consideration how heavy of use the unit will receive based on your needs. Finally, because we covered both Gas and Electric water heaters in our buying guide, be sure to focus on the format you need for your space.