After a week of hard work and thoroughly research to find the best tankless watet heater, we came to the conclusion that the EcoSmart ECO 27 Electric Tankless Water Heater is the best tankless water heater we can get in the current inventory of various premium quality best tankless water heaters. We researched a lot tankless water heater reviews keeping users real life experience into consideration.

Best Tankless Water Heater Reviews

Finding the best tankless water heater wasn’t easy for us. We from the Duly Reviewed team were confused making our decision to get the best rated tankless water heater then we came to understand that we can certainly choose one as the best tankless water heater but we can’t ignore other top rated tankless water heaters also. There are mainly two types of tankless water heaters, electric and gas powered. Certainly, electric water heaters are better but there are some gas powered tankless water heaters, those were better than many top rated electric tankless water heaters.

So, we listed the best electric tankless water heater along with the best gas tankless water heater. We also included the best RV tankless water heater into our list because ignoring this type can be a huge mistake. The best RV tankless water heater or portable tankless water heater is popular on the market, and their popularity and use are increasing day by day. So, we have listed these 3 types of tankless water heaters reviews and then we also listed some other best rated tankless water heaters reviews to give you enough option to choose from that can satisfy all your requirements and conditions.

Best Rated Tankless Water Heaters

There are many types, sizes and features available when choosing the best tankless water heater. We can’t just choose the top rated tankless water heater as the best tankless water heater. We have to consider all the features including power consumption, effectiveness, speed, guarantee, cost etc in mind while choosing the best tankless water heater for the money.

There are mainly two types of tankless water heater, electric tankless water heater and gas tankless water heater. If we keep portability in mind then there is another variety of tankless water heater and that is portable or RV tankless water heater.

So, instead of choosing one, we choose 3 best rated tankless water heaters, 1 for each type of tankless water heater. Tankless water heaters are expensive so we recommend you carefully understand your need and requirements before making a decision. Also, installing tankless water heater requires expert hand so if you are not confident about your installing ability then you should hire an expert or professional for installing your tankless water heater.

Best Electric Tankless Water Heater

EcoSmart ECO 27 Electric Tankless Water Heater

EcoSmart ECO 27 Electric Tankless Water Heater

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We choose the EcoSmart ECO 27 Electric Tankless Water Heater as our best electric tankless water heater because of its extraordinary features and effectiveness. This tankless water heater is most suited for northern part of US where the average temperature is around 37°F. It can produce about 3 gallons of hot water per minute, enough to run 2 showers at a time.

If you wish to use it in the southern part of US where the average temperature is high, then it can produce 6 gallons of hot water per minute, enough for running 4 showers and a sink at a time, thus it can be a great fit large home and small hotels. For either norther part or southern part, you will never run out of hot water using the EcoSmart ECO 27 Electric Tankless Water Heater.

Its temperature control is awesome and you can set and increment the temperature by 1 degree at a time. This digital temperature control can operate with range of 80°F to 140°F and that’s enough for healthy hot water bath.

EcoSmart ECO 27 Electric Tankless Water Heater will reduce energy cost by 50% because of its unique technology. It will only provide hot water when you will need it. Tanked water heater requires a lot of space and using this best tankless electric water heater is wall mounted and will save you a lot of space.

This energy saving best rated electric tankless water heater can fit with the standard 3/4 inch NPT pipe and you will require 3 sets of 8 AWG wires to set it. This CSA certified tankless water heater has 99.8% electric efficiency.

The EcoSmart ECO 27 Electric Tankless Water Heater will require 240V electric power with 112.5 A current and it will cost 27 KW per hour. This extremely powerful and effective best rated electric tankless water heater comes with lifetime warranty.

Best Gas Tankless Water Heater

Takagi T-KJr2-IN-NG Natural Gas Indoor Tankless Water Heater

Takagi T-KJr2-IN-NG Natural Gas Indoor Tankless Water Heater

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If you are looking for the best gas tankless water heater instead of the best electric tankless water heater then our pick is the Takagi T-KJr2-IN-NG Natural Gas Indoor Tankless Water Heater. This is the best rated gas tankless water heater that comes with 140,000 BTU of heat and work extremely well.

Takagi T-KJr2-IN-NG is a natural gas powered tankless water heater that is best fit for indoor uses. It can produce 6.6 gallon of hot water per minute, enough for running 4 showers and 2 sinks for acrylic bathtub at a time.

The Takagi T-KJr2-IN-NG Natural Gas Indoor Tankless Water Heater will require 4 inch stainless steel category III venting. This water heater is equipped with inlet/outlet thermistors so that you can regularly monitor the water temperature and adjust if required.

Takagi T-KJr2-IN-NG Natural Gas Indoor Tankless Water Heater is ECO-friendly and the best gas tankless water heater for small home and apartment. It comes with 10 years warranty for heat exchanger and 5 years warranty for parts. The warranty is only valid if the whole unit is installed by properly licensed or vendor approved technician.

Best RV Tankless Water Heater

PrecisionTemp RV-550 Tankless Water Heater

PrecisionTemp RV-550 Tankless Water Heater

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If you are a RV fan and spend a lot of time with your RV then you will require a specifically designed water heater for your RV. Tanked water heaters are hassle for small spaced RV. You will require a water heater that takes low to no space at all. It is better to find the RV tankless water heater and the PrecisionTemp RV-550 Tankless Water Heater is the best rated RV tankless water heater you can get.

PrecisionTemp RV-550 Tankless Water Heater is specifically designed and manufactured for RVs, small apartments and trailers. This wall vented tanless water heater is easy to install and remove so it is a perfect fit for your RV lifestyle.

It will take half or less space than 10 gallon tank and that can save a lot of space in your RV. It is highly energy efficient and will cost lowest amount of propane and it will require no pilot light.

PrecisionTemp RV-550 Tankless Water Heater uses 1.5 Amp power normal times but uses 3 Amp if you activate the cold weather protection. It has built-in freeze protection option for all 4 seasons but for that you have to keep the gas supply and 12 Volt power supply on.

It can produce over 1 gallon of hot water per minute and this highly recommended RV tankless water heater is fully assembled, tested and designed in US. The PrecisionTemp RV-550 Tankless Water Heater is well suited for any sized trailers and RVs. This best RV tankless water heater comes with no defined warranty so you have to ak the vendor about warranty before buying this.

Top Rated Tankless Water Heaters

Stiebel Eltron Tempra Plus 24 kW Tankless Electric Water Heater

Stiebel Eltron Tempra Plus 24 kW Tankless Electric Water Heater

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Stiebel Eltron Tempra Plus 24 kW Tankless Electric Water Heater is one of the top rated tankless water heaters. Stiebel Eltron invented tankless water heating technology almost a century ago powered by electricity.

Stiebel Eltron’s tankless electric water heaters are silent, small and compact, so it will use no space at all comparing with tanked water heater. This tankless water heater requires no venting and that is a huge plus.

Its Self-Modulating Power Technology ensures 99% energy efficiency and it will only be active when you will need hot water and it has no power losses while being on standby. Its Advanced Flow Control ensure that you get constant temperature for hot water for your rain shower head and sink.

Stiebel Eltron Tempra Plus 24 kW Tankless Electric Water Heater can produce 2.6 gallon hot water at 42°F and 5 gallon hot water at 72°F. It is less expensive than other best rated electric tankless water heaters.

Installing this electric tankless water heater is easy because it requires no venting setting. This top rated electric tankless water heater comes with 7 years leakage warranty along with 3 years warranty for parts.

Eccotemp L10 Portable Outdoor Tankless Water Heater

Eccotemp L10 Portable Outdoor Tankless Water Heater

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This is a great tankless water heater for RV and outdoor use. Eccotemp L10 Portable Outdoor Tankless Water Heater is lightweight and easy to carry. For washing your pet or outdoor showers, there is no better tankless water heater than this.

As one of the best propane tankless water heater it runs on 20 lb propane tank. It runs with 2 “D” cell batteries and comes with electric ignition.

It has a safety feature for automatic shut down. If it is tilted 45 degrees either side or runs longer than 20 minutes, it will automatically stop.

It can produce hot water with temperature range of 50-140 degree F and its water output is rated 2.6 GPM. You can connect this water heater with your rv shower head or garden hose easily.

Eccotemp L10 Portable Outdoor Tankless Water Heater comes with necessary installation kits. This best rv tankless water heater comes with 1 year product warranty.

Rheem RTG-64DVLN Prestige Indoor Tankless Natural Gas Water Heater

Rheem RTG-64DVLN Prestige Indoor Tankless Natural Gas Water Heater

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If you are looking for the best natural gas tankless water heater then you can choose Rheem RTG-64DVLN Prestige Indoor Tankless Natural Gas Water Heater without further investigation. It is one of the best indoor gas tankless water heaters that runs on natural gas.

This top rated natural gas tankless water heater can produce 6.4 gallon hot water per minute. This ultra low nox tankless water heater uses direct vent setting for indoor use.

The package comes with 10 feet long thermostat wire and remote control system. It can produce 35 degree rise hot water than normal temperature.

With EZ-Link cable, you can connect two of this best quality gas tankless water heaters and use them as one. This water heater comes with 1-10 years limited warranty.

Rinnai V65IN 6.6 GPM Indoor Low NOx Tankless Natural Gas Water Heater

Rinnai V65IN 6.6 GPM Indoor Low NOx Tankless Natural Gas Water Heater

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There are various high quality and top rated tankless water heaters those produce great result and Rinnai V65IN 6.6 GPM Indoor Low NOx Tankless Natural Gas Water Heater is one of them.

This ultra low nox tankless water heater runs on natural gas. It is specifically built for indoor use. It produces 150,000 BTU max with 0.82 max power factor.

It fully meets the requirements for NOx Emissions Standards of Florida and California. Its compact setting and lightweight feature makes its installation easy and smooth.

This best natural gas tankless water heater has different periods of warranty for different parts. It comes with 1 year labor warranty, 5 years parts warranty and 10 years Heat Exchanger warranty.

Bosch Tronic 2.5-Gallon Electric Mini-Tank Water Heater

Bosch Tronic 2.5-Gallon Electric Mini-Tank Water Heater

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Though, Bosch Tronic 2.5-Gallon Electric Mini-Tank Water Heater comes with mini tank it is still counted as one of the best electric tankless water heater. It can produce 2.5 gallons of hot water per minute.

This small electric tankless water heater is good fit for sinks, small showers and small tubs but not good enough for rain shower heads or regular sized bathtubs.

This 120 V tankless electric water heater uses 12 A current. It is easy to maintain and cleaning the small tank also easy. You can mount it on wall, shelf or floor, wherever you like.

Bosch Tronic 2.5-Gallon Electric Mini-Tank Water Heater has higher recovery rate. So, you don’t need to wait long for hot water. It is good enough for 2 sinks at a time.

This top rated electric tankless water heater is good for indoor use. It comes with 2 years parts warranty and 6 years heater and tank warranty.

Sio Green IR260 POU Electric Tankless Water Heater

Sio Green IR260 POU Electric Tankless Water Heater

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Sio Green IR260 POU Electric Tankless Water Heater is another top rated tankless electric water heater. It runs with 220-240 V and 10-30 A electricity or 6 KW power.

It will produce hot water in no time with its high technology and fast water boiling system. It uses patented and unique technology that requires no metal coil to heat the water.

It will produce no calcium buildup, limescale deposit or corrosion. So, you need no replacement parts or filters and your maintenance cost will low down to $0.

The Sio Green IR260 POU Electric Tankless Water Heater comes with 2 years money back guarantee or free replacement of this top rated tanless electric water heater without asking any question.

You can set this best rated tankless electric water heater almost anywhere you want. This can be used as a portable water heater or best tankless water hear for RV. You can also use it as a worthy alternative for electric hot water shower.

Eccotemp FVI-12 Liquid Propane, 3.5 GPM, High Capacity Tankless Water Heater

Eccotemp FVI-12 Liquid Propane, 3.5 GPM, High Capacity Tankless Water Heater

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As one of the top rated tankless gas water heater Eccotemp FVI-12 Liquid Propane, 3.5 GPM, High Capacity Tankless Water Heater has great capacity and features.

This water heater will only be active when used. This makes it energy saver and cost effective. It runs on liquid propane. It can produce hot water with 3.5 GPM and its enough for whole house tankless water heater.

It produces low noise and it has really compact size and design. Its digital temperature display is simple and easy to understand. Great for small sized home or apartment.

With its electronic ignition system 120 V power supply option, it is safer than many other tankless gas water heaters with similar features. You can use it to fill your inflatable hot tub with hot water in a few minutes.

The Eccotemp FVI-12 Liquid Propane, 3.5 GPM, High Capacity Tankless Water Heater comes with additional parts and 2 years limited warranty.

gasFlex Tankless Gas Water Heater Excel Pro NATURAL GAS 6.6 GPM Whole House

gasFlex Tankless Gas Water Heater Excel Pro NATURAL GAS 6.6 GPM Whole House

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gasFlex Tankless Gas Water Heater Excel Pro NATURAL GAS 6.6 GPM Whole House comes with modern technology and features. Comparing with other top level tankless water heater models, it works better than them.

This high quality tankless gas water heater runs by natural gas. It can produce hot water of 6.6 GPM speed, enough for whole house use. You can run 4 sinks, 2 showers and 2 bathtubs at a time with 6.6 GPM.

It has SGS certification. This copper made tankless gas water heater needs 110 V electric connection and it is safer than many others. It can heat the water upto 35 degree F instantly so you will never run out of hot water.

gasFlex Tankless Gas Water Heater comes with necessary parts and it has a 2-6 years limited warranty for parts and heaters. As a whole house tankless water heater you can compare it any other heaters and still choose it.

Thermoflow Elex 3.5 Point-of-Use Tankless Water Heater Electric

Thermoflow Elex 3.5 Point-of-Use Tankless Water Heater Electric

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We will end our list of best tankless water heaters with the Thermoflow Elex 3.5 Point-of-Use Tankless Water Heater Electric. Great for instant hot water for low quantity.

This is a small ectric tankless water heater best suitable for single sink or faucet. It produces hot water with a speed of 0.5 GPM enough for a sink.

It will save around 60% cost for hot water and it will produce unlimited hot water with 0.5 GPM speed as long as you need from the first minute.

It uses 220-240 V, 17 A current and 3.5 KW power and 90 PSI nominal pressure. If you have all these then you can buy this high quality small electric tankless water heater.

It comes with required spare parts and 2 years seller warranty. The warranty will start from the day you bought this compact electric tankless water heater.

End Words

We have listed here all the best tankless water heaters based their product specifications and customer reviews. Before you choose any best electric tankless water heater, you should check your electric connection options and other requirements.

If you choose to buy the best gas tankless water heater, you should make sure you have enough space and security and electric option for gas tankless water heater.

For RV or portable or compact tankless water heater. make sure you choose the best rv tankless water heater otherwise you may face many difficulties in the near future.

Whichever you choose, you must consult with a professional so that the professional can instruct you which tankless water heater is best for you both economically and practically based on your requirements and needs.