16 Best Tankless Water Heater Reviews

Last updated on July 3rd, 2018 at 12:59 pm

If people worked only when their services were required, they would be a lot more efficient. The same goes with water heaters. Tankless water heaters tend to be more economical as they work only when you need hot water. Furthermore, they take up less space and spend less energy than regular water heaters. According to numerous tankless water heater reviews and experts’ opinions, instant water heaters have taken the market over from traditional ones. If you’re a newbie in this field, you’re probably wondering which tankless water heater is the best or what size to buy. Even though there’s not a single correct answer to these questions, read on to get acquainted with instant water heaters as well as the aspects you need to put into perspective before purchasing one.

Tankless Water Heater Reviews

Tankless Water Heater Reviews

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Takagi T-KJr2-IN-NG Indoor Tankless Water Heater, Natural Gas (6.6 GPM)

When you consider purchasing this model, you must be aware that you’ll have some additional expenses since it operates on natural gas. You may encounter heat loss and a complicated installation process (ventilation issues), but those things are normal when it comes to natural-gas-powered units. On the plus side, this tankless water heater is quite durable (hence the 10-year warranty on heat exchanger and 5-year on all parts) and has a very high-temperature range. Furthermore, this unit has above-average energy efficiency for a natural gas tankless water heater. All in all, this Takagi tankless water heater seems to be a good value purchase since its price is quite reasonable.

Tankless Water Heater Reviews-Takagi T-KJr2-IN-NG Indoor Tankless Water Heater, Natural Gas (6.6 GPM)

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Bosch Tronic 3000

Not only this model fit almost anywhere but it’s also easy to install – simply place it appropriately and plug it in. It’s small enough to be considered portable. In fact, it is it’s mobility and reasonable price that make this water heater a great outdoor option, perfectly suitable for mobile homes as well. Like almost all electric instant water heaters, it has a great efficiency percentage of 98%. There’s a 5-year limited warranty period which is great for a point-of-use tankless water heater. The GPM ranges from 0.5 to 1.8 depending on the device’s power. All things considered, most electric tankless water heater reviews agree that this model is the champion of practicality.

Tankless Water Heater Reviews-Bosch Tronic 3000

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Rinnai V75iN Natural Gas Indoor Tankless Water Heater (7.5 GPM)

This model has an impressive 7.5 gallons per minute flow rate. This means that it can heat enough water for up to three bathrooms. That being said, it can be used for both domestic and commercial purposes. Among other monitoring sensors, it has a scale detection system which reduces the possibility of long-term damage to the unit. Moreover, you’ll get a 10-year warranty on residential heat exchanger and 5-year warranty on other residential parts. Even though it operates on natural gas, it’s highly energy efficient and guaranteed by the Energy Star certificate. Although deemed pricey, reviews assign a great price-quality ratio to this instant water heater unit. After all, you can get it at the world’s largest online marketplace, reducing the price with one of many Amazon promo offers and coupons

Tankless Water Heater Reviews-Rinnai V75iN Natural Gas Indoor Tankless Water Heater (7.5 GPM)

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Ecosmart POU 3.5

In an attempt to determine which is the best electric tankless water heater, 2017 saw many items reviewed. This model is proclaimed to be the best point-of-use unit, recommended for single sink usage only. It has a flow rate of 0.5 GPM which makes it perfect for everyday use in bathrooms, offices, boats, and small homes or condominiums. Since it is energy efficient and durable, it’s recommended for both residential and commercial use. While you can set up the unit by yourself, it’s ill-advised to use it with a shower or multiple fixtures. It is moderately priced and compact sized which makes it one of the best option among all point-of-use units. As it’s designed for everyday use (mainly hand washing applications), it has a limited one-year warranty.


Best Tankless Water Heater-Ecosmart POU 3.5


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Stiebel Eltron Tempra 24 Plus

This model is characterized by the ability to supply hot water even when the demand is high. This is enabled by the Tempra Advanced Flow control system. While other models reduce the heat when the demand is high, Tempra 24 plus reduces the water supply but keeps the temperature steady. That’s why most of the whole house electric tankless water heater reviews recommend this model for homes demanding an unlimited supply of hot water without interruptions. Furthermore, Stiebel’s Tempra 24 plus is easy to install and moderately sized. When you take this model’s price into consideration, the Tempra 24 plus is considered to be a complete package.

Best Tankless Water Heater-Stiebel Eltron Tempra 24 Plus

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Titan SCR2 N-120 (Electric)

This is the lightest and smallest instant water heater on our list which brings us to its greatest advantage – it fits near every utility in need of hot water. Even though the unit’s lightweight, it has a maximum GPM of 4 at a 20°F temperature rise which is enough for taking a shower without having to worry about a cold-water shock. This unit has an energy rating of 99.5%, but there’s a catch – the inlet temperature mustn’t be lower than 65°F in order to keep the required temperature rise. This model doesn’t have any spectacular features, but when you consider the pricing and the item’s consistency – it’s a good value purchase.

Tankless Water Heater Reviews-Titan SCR2 N-120 (Electric)

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Rheem RTGH-95DVLN 9.5 GPM Indoor Direct Vent Tankless Natural Gas Water Heater

This model has a condensing heat exchanger responsible for the 94% energy efficiency rating which is amazing for a natural gas unit. This characteristic is one of the main reasons for placing this model on this 16 best list. However, it’s not the only reason. An admirable flow rate of 9.5 GPM allows multiple applications at the same time which makes it ideal for larger households or commercial use. Pricing and sizing are a small drawback, but when you compare the service you get from this model – it’s a good value purchase. This model is too powerful for occasional domestic use, so consider it only if you need a durable and reliable solution for a larger household.

Tankless Water Heater Reviews-Rheem RTGH-95DVLN 9.5 GPM Indoor Direct Vent Tankless Natural Gas Water Heater

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Camplux 5L 1.32 GPM Outdoor

This product is one of the best outdoor instant water heaters on the market. It’s lightweight, portable, and fueled by natural gas. A flow rate of 1.32 GPM is good enough to take a shower while you’re out camping or while spending time on a remote location in your RV. You’ll need only 2.5 PSI to start up this heater which is the lowest water startup pressure on the market. The maximum temperature rise is near 115°F, and there’s an onboard thermostat powered by a pair of D-cell batteries which allows you to regulate the temperature yourself. The price-quality ratio is also great, so we’ll evaluate this product as a good value purchase.

Tankless Water Heater Reviews-Camplux 5L 1.32 GPM Outdoor

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Noritz NRC98-DV-NG (Gas/Propane)

This model has two heat exchangers inside –  the first one is only pre-heating the water for the second. The primary exchanger’s 0.92/0.92 energy factors are enabled by the condensing function. These numbers are comparable with the efficiencies of some of the best electric instant water heaters, which is admirable. It has a high 9.8 GPM flow rate, but that comes with a price – it’s a bit expensive, and the unit itself is rather hefty. Furthermore, since it’s available at Walmart, you can use one of the Walmart promo offers and get a bargain deal. The warranty period is quite long – 12 years on heat exchangers and 5 years on parts. To sum up, if you’re looking for the best efficiency-power ratio, this model should be at the top of your wishlist.

Tankless Water Heater Reviews-Noritz NRC98-DV-NG (Gas/Propane)

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Westinghouse 11 GPM Ultra Low NOx Natural Gas

Although this unit works on natural gas, it has an Energy Star certification for its amazing energy factor of 0.98. If you decide to purchase this unit, 11 gallons per minute flow rate will be enough to supply all of your hot water needs. This model is installed in the same way as traditional water heaters, so it’s advised to hire a professional. This product is hefty but built to last – hence the 12-year warranty on the heat exchanger and 5 years on other parts. As it will be in your household for a long time, note that it also emits negligible levels of NOx thanks to its combustion control system which also makes this unit eco-friendly.

Tankless Water Heater Reviews-Westinghouse 11 GPM Ultra Low NOx Natural Gas

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EcoSmart Eco 27 Electric Tankless Water Heater (5.3 GPM)

The limited lifetime warranty by EcoSmart goes to show the quality of this product. The stylish design, as well as its small size and reasonable price, might as well be considered as bonus features of this high-quality model. The only problem may be ECO 27’s capacity during high demand periods. However, this problem can be solved by installing a valve which would throttle down the flow rate. This unit has its own module which gives this water heater an astonishing 99.8% energy efficiency. Switching from conventional heaters to this product will cut down your electricity bills by half, making this model the best electric tankless water heater.

Tankless Water Heater Reviews-EcoSmart Eco 27 Electric Tankless Water Heater (5.3 GPM)

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SioGreen IR260 (1.36 GPM)

This model offers something completely different. The IR260 isn’t just an instant point-of-use electric water heater – it also keeps the water clean by using an infrared quartz element. This way, calcium and metallic deposits, as well as corrosion, are avoided. A 1.36 GPM flow rate is more than enough for your everyday point-of-use tankless water heater. It’s pretty light, so it’s easy to install as well as low-maintenance. Furthermore, this unit saves up to 65% energy when compared to any other electric point-of-use tankless water heater. Taking everything into consideration, the price tag is reasonable, so we highly recommend this unit for both residential and commercial use.