Top 10 Best Gas Or Electric Tankless Water Heater in 2019

The popularity of tankless water heaters is always high and as you expect, the market is brimming with many options. For homeowners, choosing the best tankless water heaters is their main goal. This review will help you get the best tankless water heater. Here is everything that you wish to know from how the best water heaters look like, the tips for scouting for a tankless water heater and why you require one in your home. Think of this as your all in one resource for best Gas or electric tankless water heater in 2019. We have researched the market to get the best tankless water heaters and analyzed them to get what makes them special.

Table of the Best Gas Or Electric Tankless Water Heater:

01. Stiebel Eltron

Stiebel Eltron
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Stiebel Eltron electric tankless water heater is one of the best technologically advanced water heater in the market today. It has been completely redesigned in and out, upgraded, hinged cover for cheap access, a simple single flow design and also advanced flow control. The tank has no inconveniences to the users ho water requirements. It reduces the electric bills and save energy compared conventional tank water heater. Compared to other tankless models it is cheap.

02. Eccotemp

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If you are planning to camp with your family or spend a day in a lake or lounging in a pool, sometimes all you require is a nice hot shower. Eccotemp is the perfect campsite, cabins or just around the house. It is capable of attaining temperatures of 50 to 140 degrees Fahrenheit. It includes an electric ignition which is powered by 2 “d” cell batteries and this makes it a great for off grid or other areas where electricity is not available.

03. Rheem RTEX

Rheem RTEX
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Rheem RTEX is an electric powdered product that heat water on demand and give hot water in a continuous supply. As opposed to other type of models that are subjected to heat loss, Rheem RTEX is not prone to energy wasting in such amount can be economical on costs up to 50 %.The efficiency of the energy is 99% while heaters with Rheem RTEX have 60 -70 % depending on the model.Electric water heaters that are for residential use are designed for use points while those with more heating elements and power.24 kW, 27 kW and up can be utilized for whole house water heating and supply more than one fixture with hot water.

04. Stiebel Eltron

Stiebel Eltron
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This is one of the best tankless water heaters used residential and commercial areas. It has a copper heating coil and design which is copper allows for years of good services and performance. Heating is controlled by a flow switch, a manual switch and a thermostat with scald guard where ware is kept within a safe temperatures. With the assist of a flow reducer, giving a low water flow a high saving value. The style uses less save thus the cost of installation is cheap than a water heater with a tank. Stiebel Eltron has a 3 year warranty through the manufactures and can be used by commercial users and office kitchens, residential areas, office kitchen, warehouses, hotels, motels and restaurants.

05. Aquah Indoor Natural Gas Tankless Water Heater

Aquah Indoor Natural Gas Tankless Water Heater
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Aquah tankless water heater has an automatic electric pulse ignition without standing pilot. It is operated by 2D batteries or 110 V AC as an option, free AC Adapter, Thermal efficiency less than 85%, IC water control device,32000 Watt/109,260 Btu/h thermal input,25 to 110 water pressure for operation, 2000 Pa (0.29psi) gas pressure, 1/2″ gas inlet, 1/2″ water inlet/Outlet, Winter/Summer control; Min and Max Water or Gas flow adjustment, net weight: 30.20 lb,needs 5″ double wall that is type B vent pipes.

06. Thermoflow Elex

Thermoflow Elex
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Thermoflow Elex is a tankless water heater which has no losses that tank water heaters are subject to and this results to saving 15-20 % in comparison with electric tank water heater. It heats water only when it is used and there is an endless supply of hot water. Thermoflow Elex tankless water heater replaces conventional tank heater completely, stylish design can be installed anywhere close to hot water taps and requires less space. The electric temperature control ensures a steady output temperature even when flow rates vary. It also requires no venting and this allows more flexibility when determining the best installation place.


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AQUAH Outdoor Natural Gas is intended for use only in warm areas where the temperature cannot reach freezing point. Thermal efficiencies go beyond 85% and a power range from 12KW to 24KW and the products can cover most demand requirements. The warranty of AQUAH is three years for electric users and five years for electric heaters and five years tankless heaters.

08. Takagi T-K4-IN-NG Indoor Tankless

Takagi T-K4-IN-NG Indoor Tankless
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The T-K4 is an improved version of T-K3. It is one of the tankages smaller tankless water heaters. At 13.8 inches wide and weighs 38 pounds and its ultra-compact design enables it to be mounted on a wall. It is efficient and environmental friendly. Installing this unit will assist homeowners to save 45% on monthly bills because tankless water heaters only burn gas when water is required.

09. Navien NPE

Navien NPE
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Navien NPE tankless water heaters use existing ½ gas line, dual stainless steel heat exchangers, ultra condensing efficiency, field gas convertibility,2” PVC venting, comfort flow technology and also great preheating technology.

10. Ridgeyard Portable

Ridgeyard Portable
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Ridgeyard Portable has compact and lightweight and is easy to handle. It has anti-dry combustion, auto cut-off, and flame –out protection. Its ignition is 2D requiring battery with high energy efficiency. It has a gas pressure of 2800Pa and applicable water pressure of 0.015Mpa. When installing, fittings are available and a bonus of shower head perfect for small homes, camping sailboats, RVs and cabins or anywhere you require hot water.


In conclusion, tankless water heaters are crucial now and in the future. The world is shifting to sustainable energy and it is not possible to imagine that tankless water heaters will not be functional in the future. They not only heat water fast but also do it without using a lot of energy.

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