Tankless Water Heater Reviews

Tankless water heaters appeal to people for many reasons:
– they love the idea that they are only paying to heat hot water when they actually need hot water;
– they appreciate the added space that they have when a 60-gallon tank is removed from their home;
– and they like the thought that they are reducing their energy use and emissions, which is good for the environment and for their monthly bills.

Tankless water heaters have long been used worldwide, but have come to the U.S. in only the past couple of decades.
They come in three styles: electric, gas and liquid propane.

Installation of many of these heaters can be very involved.
You might need to add amps to your electric grid, you might need a larger incoming gas line and you might need professional help to wire it all correctly (check HERE for free installation quotes).

Some DIYers are able to install tankless heaters on their own, but other consumers have tales of spending four figures to have their heaters set up correctly. You should do the math on the costs of tankless heaters plus installation vs. the energy savings that you will enjoy for years to come.

One other disadvantage of tankless heaters is that they can sometimes take several seconds to produce hot water; others will produce hot water only when there is a sufficient flow of water to trigger the heater into action. This produces the famed “cold water sandwich” that some tankless owners report, when the water starts out cold, runs hot as the faucet is opened more, then runs cold again as the faucet is turned down.

Tankless heaters come in many sizes, from tiny units meant to govern the use of just one sink or outdoor shower to large units that can handle an entire home (two showers at a time plus an appliance).

Tankless Water Heater Reviews – High to low Ratings

Ecosmart ECO 27

Ecosmart ECO 27 27 KW at 240-Volt Electric Tankless Water Heater with Patented Self Modulating Technology

Rating: (4.8 out of 5 stars)
Efficiency and reliability are two things you must consider when purchasing a water heater given all the available options in the market today. And if you live in an area where the temperature of incoming water reaches a low 37oF, then … [ more ]
Price Indication:
$380 – $420

Ecosmart ECO 18

Ecosmart ECO 18 18 KW at 240-Volt Electric Tankless Water Heater with Patented Self Modulating Technology

Rating: (4.8 out of 5 stars)
Selecting a tankless water heater may be a headache for some with the many brands out in the market today. Thankfully, we are given a criterion that makes it easier to choose: the tankless water heater’s capability to control the amount of energy used. This is what separates Ecosmart from … [ more ]
Price Indication:
$350 – $400

Stiebel Eltron Tempra 20 Plus

Stiebel Eltron Tempra 20 Plus Electric Tankless Whole House Water Heater, 240 V, 19.2 kW

Rating: (4.8 out of 5 stars)
The electric Stiebel Eltron Tempra 20 Plus is the less expensive alternative to gas-powered tankless water heaters, both in terms of unit cost and installation fees. The hot water portion of your electrical bill is reduced by … [ more ]
Price Indication:
$500 – $600

Rinnai RL75iN

Rinnai RL75iN Natural Gas Tankless Water Heater

Rating: (4.6 out of 5 stars)
If you’re lucky enough to live in areas where there is natural gas, then purchasing the Rinnai RL75iN Natural Gas Tankless Water Heater is your best option. This water heater is suited for use in two to three bathroom homes, and delivers up to … [ more ]
Brand:Rinnai
Size:7.5 GPM
Price Indication:
$850 – $950

Stiebel Eltron Tempra 24 Plus

Review on Stiebel Eltron Tempra 24 Plus Electric Tankless Water Heater

Rating: (4.6 out of 5 stars)
These days many people live in limited space like apartments or condos. And if you are one of them and in the market for a water heater, do check out the Tempra 24 Plus Electric Tankless Water Heater by Stiebel Eltron. Its compact size will save you … [ more ]
Price Indication:
$650 – $750

EcoSmart 11 Kw

EcoSmart 11 Kw Tankless Water Heater

Rating: (4.6 out of 5 stars)
EcoSmart’s tankless water heaters come highly recommended not only because of its affordability but largely for its performance which is backed with sophisticated technology. And the EcoSmart 11 kW Tankless Water Heater reflects that. While it is used for … [ more ]
Brand:EcoSmart
Size:2 GPM
Price Indication:
$220 – $260

Ecosmart ECO 8

Ecosmart ECO 8 8 KW at 240-Volt Electric Tankless Water Heater with Patented Self Modulating Technology

Rating: (4.6 out of 5 stars)
Ecosmart’s tankless water heaters are very popular because of their excellent price / performance combination. Thanks to Ecosmart technology, they are more affordable than similar tankless water heaters while performing equally well (if not better). The … [ more ]
Brand:EcoSmart
Size:2 GPM
Price Indication:
$190 – $230

Rheem RTE 9

Rheem RTE 9 Electric Tankless Water Heater, 3 GPM

Rating: (4.5 out of 5 stars)
Rheem’s reputation in providing high quality water heaters remains solid with the RTE 9 Electric Tankless Water Heater. This on demand water heater is perfect for applications within the home, apartment, condo, office, hospitals, laboratories and even recreational vehicles (your boat included). For … [ more ]
Brand:Rheem
Size:3 GPM
Price Indication:
$160 – $180

Rheem RTE 13

Rheem RTE 13 Electric Tankless Water Heater, 4 GPM

Rating: (4.4 out of 5 stars)
The Rheem RTE 13 is an electric tankless water heater which is ideal for point-of-use applications. Its compact profile allows installation to be convenient, especially for those living in homes with limited spaces. It is built with a compact and efficient design, … [ more ]
Brand:Rheem
Size:4 GPM
Price Indication:
$200 – $230

Eccotemp L5

Eccotemp L5 Portable Tankless Water Heater and Outdoor Shower

Rating: (4.4 out of 5 stars)
Looking for a water heater that you can take anywhere? Try Eccotemp L5 Portable Tankless Water Heater with Outdoor Shower. Just mount it and attach to a propane tank, and voila! You get hot water instantly. The Eccotemp L5 is the … [ more ]
Price Indication:
$100 – $120

Stiebel Eltron Tempra 29 Plus

Stiebel Eltron Tempra 29 Plus Electric Tankless Whole House Water Heater, 240 V, 28.8 kW

Rating: (4.4 out of 5 stars)
The Stiebel Eltron Tempra 29 is yet another Stiebel Eltron heater from the Tempra line. Like all Tempra’s, this is a whole house tankless water heater that uses 240 volts, but it draws in 28.8 kW in order to reach an impressive … [ more ]
Price Indication:
$700 – $800

Rinnai RL94iP

Rinnai RL94iP Propane Tankless Water Heater, 9.4 Gallons Per Minute

Rating: (4.4 out of 5 stars)
The Rinnai RL94iP tankless water heater is the propane counterpart of the RL94iN that similarly delivers 9.4 gallons per minute (GPM) of hot water. With the RL94iP you have sufficient supply of hot water to five plumbing fixtures or water-intensive appliances … [ more ]
Brand:Rinnai
Size:9.4 GPM
Price Indication:
$950 – $1050

EZ 101 Tankless Water Heater

EZ 101 Tankless Water Heater - Propane LPG - Portable - Battery Powered Ignition - Camping - RV

Rating: (4.4 out of 5 stars)
If you’re the outdoorsy type who loves to camp, hunt, or fish, the EZ101 Tankless Water Heater is the right partner for your adventures. This portable propane-fueled water heater, the manufacturer’s most economical model, has battery powered ignition for … [ more ]
Price Indication:
$120 – $140

Noritz NRC111-DV NG

Noritz NRC111-DV NG Condensing Tankless 8.4 GPM Natural Gas Water Heater

Rating: (4.3 out of 5 stars)
This indoor only whole house model activates at a low 0.05 GPM and at 105oF, is capable of delivering 10.6 GPM during summer with a 70oF ground temperature, and 6.2 GPM during the winter with a 45oF ground temperature. Taking two showers simultaneously or even… [ more ]
Brand:Noritz
Size:8.4 GPM
Price Indication:
$1500 – $1700

Rheem RTG-64DVN

Rheem RTG-64DVN Direct Vent Indoor Series Natural Gas 6.4 GPM Tankless Water Heater

Rating: (4.3 out of 5 stars)
The Rheem RTG-64DVN Tankless Gas Water Heater belongs to the same series as the RTG-95DVN; the only difference being that this particular unit delivers lower volume at 6.4 gallons per minute (GPM). This indoor high altitude compliant water heater supplies … [ more ]
Brand:Rheem
Size:6.4 GPM
Price Indication:
$650 – $700

Rinnai RL94iN

Rinnai RL94iN Natural Gas Tankless Water Heater, 9.4 Gallons Per Minute

Rating: (4.2 out of 5 stars)
Using natural gas as the power source of your water heater is the least expensive way to go; make the heater a tankless and you’ve got a power combination in savings. So, if you’re in areas with natural gas, try the Rinnai … [ more ]
Brand:Rinnai
Size:9.4 GPM
Price Indication:
$950 – $1050

Eccotemp L10

Eccotemp L10 High Capacity Outdoor Tankless Water Heater

Rating: (4.2 out of 5 stars)
The Eccotemp L10 High Capacity Outdoor Tankless Water Heater is a popular brand and model among horse owners for washing horses. It provides just the right amount of hot water to please their hardworking barn friends. But the L10 is also a good choice if you’re … [ more ]
Price Indication:
$200 – $230

Navien NR-210A

Navien NR-210A Condensing Tankless Water Heater with Pump and Buffer Tank, Natural Gas

Rating: (4.1 out of 5 stars)
New technologies in water heating offer efficiencies that were unheard of decades ago, and an increasing number of manufacturers, like Navien, continue to improve on existing ones. The Navien NR-210A Condensing Tankless Water Heater uses … [ more ]
Brand:Navien
Size:7 GPM
Price Indication:
$1500 – $1700

Eccotemp 40HI-NG

Eccotemp 40HI-NG Indoor Gas Tankless Water Heater, 135,000 British Thermal Unit

Rating: (4.1 out of 5 stars)
Eccotemp tankless water heaters are among the least expensive yet reliable heaters out now. If you have natural gas in your area and would like to shift to a tankless from a conventional storage tank, you may want to try the Eccotemp 40HI-NG Gas Tankless Water Heater that … [ more ]
Brand:Eccotemp
Size:6.3 GPM
Price Indication:
$400 – $450

Bosch AE-7.2 PowerStar

Bosch AE-7.2 PowerStar 1.2 GPM Point-Of-Use Indoor Tankless Electric Water Heater

Rating: (4.0 out of 5 stars)
The Bosch AE-7.2 PowerStar is a point-of-use electric tankless water heater that supplies a maximum flow rate of 1.2 gallons per minute (GPM), just right for one kitchen sink application. As this is installed right where you need it, you no longer have to wait … [ more ]
Brand:Bosch
Size:1.2 GPM
Price Indication:
$190 – $210

Marey 5L

Marey Tankless Water Heater Propane Gas 2 GPM Hot Water with No Electricity Needed

Rating: (4.0 out of 5 stars)
Switching to “green” in your apartment? Then you may want to consider the propane gas-powered Marey Tankless Water Heater that supplies 1.3 gallons per minute of instant hot water for a single bathroom apartment (not 2 GPM as indicated on Amazon!). This … [ more ]
Brand:Marey
Size:1.3 GPM
Price Indication:
$130 – $150

Eccotemp FVI-12-LP

Eccotemp FVI-12-LP High Capacity Propane Tankless Water Heater

Rating: (4.0 out of 5 stars)
For those that do not live in all electric houses, there is a cheaper and more eco-friendly choice for you when it comes to water heaters: the propane powered Eccotemp FVI-12 LP High Capacity Tankless Water Heater. This indoor water heater produces … [ more ]
Brand:Eccotemp
Size:3 GPM
Price Indication:
$250 – $280

Eccotemp FVI-12-NG

Eccotemp FVI-12-NG High Capacity Gas Tankless Water Heater

Rating: (3.9 out of 5 stars)
Similar to the Eccotemp FVI-12-LP, the FVI-12 NG is an electric high capacity tankless water heater, but it is fueled by natural gas. Likewise, this indoor unit delivers 3.4 gallons per minute of hot water that is sufficient for light to moderate demands … [ more ]
Brand:Eccotemp
Size:3.4 GPM
Price Indication:
$250 – $280

Rheem RTG-95DVN

Rheem RTG-95DVN Direct Vent Indoor Series 9.5 GPM Natural Gas Tankless Water Heater

Rating: (3.9 out of 5 stars)
With the popularity of oversized tubs and luxury bathrooms the demand for large volumes of water at low cost is increasing. Rheem provides a solution with its RTG Series. The RTG-95DVN Direct Vent Heater provides a stream of hot water continuously while … [ more ]
Brand:Rheem
Size:9.5 GPM
Price Indication:
$900 – $1000

Stiebel Eltron Mini 6

Stiebel Eltron Mini 6 Electric Tankless Water Heater, 220 -240 Volt, 5.7 kW

Rating: (3.7 out of 5 stars)
Designed as a point-of-use water heater, the Stiebel Eltron Mini 6 electric tankless water heater supplies unlimited hot water instantly to one appliance only. Because it eliminates standby heat losses common to tank water heaters, you get significant … [ more ]
Price Indication:
$150 – $170

Navien NR-240A

Navien NR-240A (CR-240A) Tankless Hot Water Heater with Circulating Pump and Buffer Tank

Rating: (3.5 out of 5 stars)
Similar to the Navien NR-210A, the NR-240A is a tankless hot water heater that has a built-in circulating pump and buffer tank except that this model delivers 11 gallons per minute at 45oF rise. In colder climates, the unit has a maximum flow rate of 6 GPM … [ more ]
Brand:Navien
Size:7 GPM
Price Indication:
$1500 – $1700

Bosch AE-9.5 PowerStar

Bosch AE-9.5 PowerStar 1.5 GPM Point-Of-Use Indoor Tankless Electric Water Heater

Rating: (3.4 out of 5 stars)
Similar to the Bosch AE-7.2 PowerStar, the Bosch AE-9.5 PowerStar is a tankless electric water heater used for indoor applications except that it provides a slightly higher volume: 1.5 gallons per minute (GPM). Like other point-of-use models, this unit significantly cuts … [ more ]
Brand:Bosch
Size:1.5 GPM
Price Indication:
$190 – $210

Bosch AE125 PowerStar

Bosch AE125 PowerStar 4 GPM Indoor Electric Tankless Water Heater, White

Rating: (3.2 out of 5 stars)
The Bosch AE125 Powerstar Electric Tankless Water Heater delivers up to four gallons per minute (4 GPM) and can supply water for two kitchen sinks or for one major appliance at a time. This indoor water heater is suitable for areas with ground water temperature below 60oF … [ more ]
Brand:Bosch
Size:4 GPM
Price Indication:
$650 – $750