Updated November 2018

Best Tankless Water Heaters


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Best Tankless Water Heaters Updated November 2018





t Eco 27 Electric
Check Price at: 1 store
An efficient and compact tankless water heater with a lifetime warranty.
Compact and proficient design. Quite powerful and can run up to four different water sources at the same time. The unit of the heater is automatically controlled by its digital thermometer-this enables you to have maximum control over the temperature of the water coming into your home.
Some owners have noted the water heater elements corroding easily-if the water coming to your house is from an aquifer. Model also has a marginally lower flow rate than competitors on the market.


Gas 10L Tankless Water Heater
Check Price at: 1 store
A cost-efficient model that is proven to please cost-conscious consumers looking for an energy-saving water heating solution.
Quality and affordable model that is partially battery-powered and requires no electric connection to work.
Limited for use in some homes because there are clearances that must be met before mounting it-to guarantee it has enough fresh air.


Indoor Tankless, Natural Gas
Check Price at: 1 store
An affordable and solid gas water heater that works well in homes where multi-tasking needs are minimal.
Affordable solution with good documentation and a helpful product manual. In fact, some owners have been able to install this gas system themselves when lines were already present.
Not ideal for large homes. Professional installation can be costly and many owners report the need for a specific additional venting system.

Rinnai RUC98iN

Ultra Series Natural Gas Tankless Water Heater
Check Price at: 1 store
Space-saving design that can be installed indoors.
A quiet and compact solution. For residential users, it includes a limited 12-year warranty on the heat exchanger, 5-year on parts, 1-year on labor.
Professional installation can be expensive. The manufacturer says the warranty is void if not professionally installed, however many homeowners report their warranty is still intact with DIY installation. Arrives with a max temperature setting of 120 degrees which is not hot enough for some homeowners.

Rinnai Natural Gas Tankless

Check Price at: 1 store
Unit can handle enough volume to support multifunctional use in a larger home. Designed for indoor installation.
Supports simultaneous use of multiple appliances at once and affords easy temperature adjustments. Quiet unit when not in use.
Frequent reports of leaks from an external heat exchanger after several months of use. Installation is difficult. Requires maintenance regularly. Reports of poor customer service from company.


Customer Reviews

Are you tired of getting high utility bills due to an inefficient tank water heater? Or tired of waiting for water to heat before you can shower or wash dishes? If so, then a tankless water heater may be right for you.

We have gone out of our way to research and review the top five tankless water heaters in the market, to help you narrow down your options and get the best model for your home.

Tankless Water Heater Reviews Guide

The traditional water heater takes some amount of time for; the tank to fill, the burner to come on, and the water to be heated. Additionally, after some time the water cools and has to goes through the whole reheating process repeatedly-wasting energy (and dollars).

Many of these problems could be solved by using a tankless water heater in place of the traditional tank water heater. Reduced energy bills, long product lifespan and endless hot water are the two major reasons why most homeowners today are buying the tankless water heater.

Tankless water heaters have the capacity to efficiently deliver hot water to you on-demand by only producing hot water only when it’s needed.”

How They Work

The process behind the operation of a tankless water heater is not rocket science, in fact, it’s quite simple. When you open the hot water tap in your house, a certain amount of cold water gushes into the tankless heater-after that, the heating element (gas or electric burner) swings into action, and the burner heats the water that passes through it. Thus, the water leaves the on-demand heater steaming hot and ready to use. Every tankless water heater is capable of providing a regular supply of water; however, they are limited to the heater’s flow rate-which is the quantity of water the tankless water heater is able to heat per time. Thus, it’s important to check the flow rate of the tankless water heater before you purchase one-because a unit with a lower flow rate may not be able to serve your home properly.


If you’re particular about hygiene-the Marey Gas 10L Tankless Water Heater would impress you. Using this tankless water heater saves you the stress of worrying about regular cleaning because it has little-to-no rust buildup which makes your heated water completely safe and clean for consumption.

4 Major Factors to Consider

  • Multitasking – Many tankless water heaters work best in homes that don’t run several water sources concurrently. Thus, it’s wise to buy a larger tankless water heater, if you’re planning to multitask or need to get hot water running at different locations in your home at the same time.
  • Initial Cost – Tankless water heaters cost more than traditional options. This is one important factor to consider when you’re going for tankless water heater-especially if you’re after quality. Obviously, you don’t expect a $300 tankless water heater to give you the same quality of a $1000 tankless water heater-which will supply an ample amount of hot water to a big home quickly. 
  • Energy-Savings – Due to their design, tankless water heaters save owner’s money (10% as compared to tank water heaters) due to their energy savings features.
  • Space Saving–  A standard water heater is relatively large and requires additional space for ventilation and clearance. In contrast, a tankless water heater leaves a lot of room for you to use-because its wall mounted. If space is at a premium in your home, a tankless heater may be a good option for you. 

According to ENERGY STAR, a certified gas tankless water heater use 9 percent less energy than a conventional gas tankless water heater. ”


The EcoSmart ECO 27 is so compact-you’ll love the extra space you end up with after installation. And since it can supply up to four different water sources at the same time, it provides an ideal amount of on-demand hot water for moderately sized homes. 

Do you know? Water heaters use up to 25% of your home’s total energy consumption?”

Frequently asked questions

What Is The Best Rated Tankless Water Heater?

Before you term a tankless water heater as “the best,” there are things you have to put into consideration-like energy efficiency, compatibility, ease of temperature adjustment, installation, longevity, etc. The  EcoSmart Eco 27 Electric is a fantastic choice since it ticks all the boxes for each category.

However, if you prefer a tankless water heater that requires no electricity for operation-contains an auto ignition-and is simple to install, then the Marey Gas 10L Tankless Water Heater will do the trick.

The Takagi Indoor Natural Gas is another good option to consider if you’re looking for a unit that can produce hot water in warmer climates for up to two bathrooms and has safety features like surge protection, troubleshooting diagnostic codes, and freeze protection.

Is a tankless water heater better?

A tankless water heater is better if your priority is to get hot water on demand save energy regardless of how much hot water you use in a day, have access to an unlimited supply of hot water and save space in your home while at it.

Do tankless water heaters need maintenance?

Generally, tankless water heaters need maintenance-and this should be done at least once a year by a professional. However, it’s necessary to carry out maintenance more than once in a year if you leave in an area that has hard water-because your water may probably have an excess amount of minerals in it-mainly magnesium and calcium.

Also, if you’re fond of setting your tankless water heater on high temperature-you’d be at the risk of a scale buildup-which requires maintenance at least twice a year.

The team that worked on this review

Kealia Reynolds
Photo Editor
Rebekah Sedaca
Kelsey Roadruck
John Morgan

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