Rheem Tankless Water Heater Reviews – Picking The Best One For Your Needs

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Rheem RTGH-95DVLN 9.5 GPM

Key Features:

  • 94% energy efficient
  • Intelligent electronic controls designed to increase energy efficiency and safety
  • Self-diagnostic system for easy installation and service
  • Great value for your money

One of the hottest home improvement trends over the last few years is something called a tankless hot water heater, which uses the temperature outside to heat the water faster. This design allows manufacturers to eliminate the bulky tanks that you usually associate with hot water heaters and to give you back more of your storage or floor space. Some of the top tankless hot water heaters come from Rheem, which has a long history of providing solid appliances and products for residential use. We should know, we compared them all.

The first thing to look at when examining these hot water heaters is the energy efficiency rating, which tells you how efficient the water heater is and whether it can help you save on water heating bills. It’s also important that you look at the flow rating. This simple term tells you both how much water it will release in a minute and whether that flow will change based on the temperature of the water.

After examining all of the top tankless hot water heaters from Rheem, we selected the Rheem RTGH-95DVLP 9.5 GPM Indoor Direct Vent Tankless Propane Water Heater as the best one on the market. With a maximum flow rating of 9.5 gallons per minute, this water heater is perfect for homes with three bathrooms, and you’ll find that it can also supply an almost endless stream of hot water to your kitchen too. Compatible with both two-inch and three-inch PVC pipes, this hot water heater is easy to install and will help you save money almost right away.

Though you can spend hours trying to track down the best Rheem tankless hot water and read reviews from other customers, you can also take our advice and invest in the Rheem RTGH-95DVLN 9.5 GPM Indoor Direct Vent Tankless Natural Gas Water Heater, which will work equally well in homes with one to three bathrooms. The maximum flow rate, which refers to the amount of hot water that comes out every minute ranges from8.4 to 9.5 gallons, though you may find that it has a lower flow rate when used in a home with fewer bathrooms. As a compact water heater, this model requires a small amount of space equal to a traditional medicine cabinet.

A self-diagnostic system makes this one of the best models around because this system cuts down on the frustration you feel when installing the water heater and when it encounters any problems or stops working later. The electronic controls make it easy to change the temperature for each user who takes a shower and to adjust the water temperature when doing dishes or washing your hands. As a low emissions hot water heater, this tankless model from Rheem produces fewer emissions and has a 0.94 energy efficiency rating.

Rank Product Review Score
1 RHEEM RTGH-95DVLN
10 Buy on Amazon
2 Rheem RTGH-84DVLN
9.7 Buy on Amazon
3 Rheem RTGH-95XLN
9.6 Buy on Amazon
4 RHEEM RTG-84DVLN
9.5 Buy on Amazon
5 RHEEM 240V RTEX-08
9.3 Buy on Amazon
6 Rheem RTEX-13
9 Buy on Amazon
7 Rheem RTEX-18
8.6 Buy on Amazon

1. Rheem RTGH-95DVLN 9.5 GPM Indoor Natural Gas

Rheem RTGH-95DVLN 9.5 GPM

Though some people think of natural gas and propane as being pretty similar, this Rheem RTGH-95DVLN 9.5 GPM Indoor Direct Vent Tankless Natural Gas Water Heater shows that you need a different water heater when you use natural gas in your home. This hot water heater has all the same features of our top choice but is safe to use in a home that relies on natural gas. Its stainless-steel heat exchanger uses condensing technology to heat your water, and this exchanger is just one reason why this model has a 0.94 energy efficiency rating.

If you live in Texas, California or another state that has low emissions standards, you’ll appreciate the benefits of using this model because it is actually a low emissions heater that produces fewer emissions to help you do your part to save the environment. It features intelligent controls that are similar to the electronic controls found on other models, but these controls help you save on the amount of natural gas it takes to heat your water. This hot water heater also has a temperature range as well as a maximum temperature setting that lets water come out hot but not so hot that it might burn someone.

Rheem includes something called guardian film wrap that is exclusive to some of its hot water heaters, and this film wraps around the water heater to reduce the risk of overheating. It also features built-in freeze protection that lets you use the water heater at temperatures of up to -30 degrees Fahrenheit, and this freeze protection also reduces the risk of water freezing inside your pipes on colder days and nights. Though designed for residential use, this hot water heater has a manifold that allows users to connect up to six hot water heaters for use in apartment buildings.


 2. Rheem RTGH-84DVLN Tankless Water

The Rheem natural gas tankless water heater features thenext generation burner technology which is the industry best. Working on natural gas it also has a built-in electric blower power supply of 120 volts having a power cord. It is energy star certified. It also has freeze protection up to -30 F. The flow rate of this tankless water heater is 8.4 gallons per minute.

The ignition and internal controller require electricity to start, while the heat is provided by the gas. The maximum water temperature that this water heater can give is 140 degrees. While the recommended setting that’s energy-efficient is 120 degrees.

You can take a shower, run the dishwasher, and run the washing machine at the same time and still never run out of water. It gives plenty of hot water for a regular house.

It has a UMC-117 remote control and 10 ft. thermostat wire that is included. An EZ-LinkTM cable is available for high demand applications to attach two tankless units to operate as one single unit up to 6 units with an optional MIC-6 manifold control board.

All Rheem models can be linked in up to 20-unit manifold installations by using the optional MIC-180 and MICS-180 manifold control assembly. It also has a high-altitude capability of up to 9,840 ft. elevation above sea level. All Rheem tankless water heater models have third-party efficiency certified by GAMA.

It gives continuous hot water, its compact and energy saving, and has a space-saving design.It has intelligent electronic controls to increase energy efficiency and safety and a self-diagnostic system digital display to show maintenance codes and temperature settings.


3. Rheem RTGH-95XLN Water Heater 

The Rheem tankless outdoor 9.5 gallons per minute water heater has an energy factor of .94 with an efficient condensing heat exchanger of stainless steel. The tankless water heater has a 2 pipe direct vent system designed for a PVC pipe. The PVC pipe can be up to 35 feet of a 3 feet PVC pipe or 5 feet of a 2 feet PVC pipe. This Rheem tankless water heater is to be installed outdoors.

It has an industry-best .26 GPM minimum flow rate, .40 GPM minimum activation flow rate. It has a digital UMC-117 remote control and a 10-feet thermostat wire is included.An EZ-LinkTM cable is available for high demand applications to attach two tankless units to operate as one single unit up to 6 units with an optional MIC-6 manifold control board.

All Rheem models can be linked in up to 20-unit manifold installations by using the optional MIC-180 and MICS-180 manifold control assembly. It also has a high-altitude capability of up to 9,840 ft. elevation above sea level.

All Rheem tankless water heater models have third-party efficiency certified by GAMA. It gives continuous hot water, its compact and energy saving, and has a space-saving design. It has intelligent electronic controls to increase energy efficiency and safety and a self-diagnostic system digital display to show maintenance codes and temperature settings.

Rheem is the leader in manufacturing total heating and water heating solutions. In fact, Rheem is a global brand with products covering commercial and residential heating solutions, tankless water heaters, storage water heaters, solar water heaters, accessories, and replacement parts for all categories- making them a one-stop solutions provider.


4. Rheem RTG-84DVLN 8.4 GPM Low NOx Direct Vent 

Using a natural gas water heater in your home might worry you because you don’t want that gas staying inside, but this Rheem RTG-84DVLN 8.4 GPM Low NOx Direct Vent Tankless Natural Gas Water Heater ensures that the gas vents outside to keep both your home and your family safe. It comes with a direct vent option that lets you or a contractor connect the water heater to existing vents or new vents you install to push out any natural gas that the heater may not use. As it is compatible with different types of vents and venting materials, it will work with most systems without requiring any upgrades.

When the degree rise that it uses is only 35 degrees or less, which means that it only needs to increase the water temperature by up to 35 degrees, it has a maximum 8.4 gallons of water per minute flow rate, which is enough for supplying both a kitchen and one or more bathrooms with hot water. When it needs to increase the water temperature by 45 degrees or more, it drops its maximum flow rate down to 6.6 gallons of hot water per minute. This flow rate can drop even further when groundwater temperatures are much cooler.

Once you install and set up this Rheem hot water heater, you may find that your favorite feature is the remote control, which lets you increase and decrease your water temperature with just a few presses of the remote, even if you are on the opposite side of the room. An included condensing connector feature allows any of the water that collects inside to drip down and away from the working parts inside. As a natural gas tankless hot water heater, this model also meets the emissions standards required by some states for residential applications.


5. Rheem 240V Heating Chamber RTEX-08 Residential

Why spend a lot of money on a tankless hot water heater that is too big for your small or tiny home, when you can pick up this Rheem RTEX-08 240V Heating Chamber Residential Tankless Water Heater for a fraction of the price? Suitable for homes with a single bathroom, it provides more than enough hot water for your daily shower and gives you enough hot water for a sink full of dishes too. This hot water heater comes with all necessary water connections as well as adapters for connecting it to a natural gas line and electric cable.

This hot water heater is also great for use in homes with users who all have their own temperature preferences because you can adjust the water temperature by a single degree. It comes with a digital screen that shows the temperature and a knob that turns left and right to raise and lower the temperature.


6. Rheem RTEX-13 Tankless Water Heater 

The Rheem 240v heating chamber tankless water heater is an innovative product. It is space-saving and extremely energy efficient. Tankless water heaters have a long life of more than 20 years. They give instant hot water and since they have no storage tank they save on space as well as time.

This Rheem tankless water heater model has an external digital thermostat that has an adjustable control with an LED display. It has a durable copper immersion having two heating elements, and it is field serviceable. It also has a self-modulating power control.

Its installation is simple. It is 99.8% energy efficient. It has external controls to adjust the temperature in increments of 1°F. it is threaded for simple installation and easy replacement. It has a digital temperature display. It uses about 13kW of energy. It has a Model Flow Rate: up to 3.17 GPM.

The Rheem 240v heating chamber tankless water heater offers continuous hot water quick and on-demand for a single point of use or multiple applications.

It does not require an overflow line and can be mounted on the wall. Rheem is the leader in manufacturing total heating and water heating solutions. In fact, Rheem is a global brand with products covering commercial and residential heating solutions, tankless water heaters, storage water heaters, solar water heaters, accessories, and replacement parts for all categories- making them a one-stop solutions provider.


7. Rheem RTEX-18 Tankless Water Heater

The Rheem 240V 2 heating chambers tankless water heater is an innovative product. It is space-saving and extremely energy efficient. Tankless water heaters have a long life of more than 20 years. They give instant hot water and since they have no storage tank they save on space as well as time.

The Rheem 240V 2 heating chambers tankless water heater offers continuous hot water quick and on-demand for a single point of use or multiple applications.It does not require an overflow line and can be mounted on the wall. Rheem is the leader in manufacturing total heating and water heating solutions.

In fact, Rheem is a global brand with products covering commercial and residential heating solutions, tankless water heaters, storage water heaters, solar water heaters, accessories, and replacement parts for all categories- making them a one-stop solutions provider.

It has an external digital thermostatic control with LED display (+/1 degree accuracy).It also has the most advanced self-modulation, so that you can adjust power to meet hot water demand. It has durable copper immersion two heating elements;it is field serviceable. The flow rate is up to 4.4 gallons per minute.

The installation of this tankless water heater is simple having bottom 3/4 inches NPT water connections. It is threaded for simple installation,and easy replacement. It also has a digital temperature display.


8. Rheem RTG-64XLP 6.4 GPM Low NOx Outdoor 

Using propane to heat water might worry some, but anyone will confident after installing this Rheem RTG-64XLP 6.4 GPM Low NOx Outdoor Tankless Propane Water Heater because it uses propane in an efficient manner and works outside, which makes installation easier because you do not need to hook up any vents or extra pipes. It comes with a 10-foot spool of wire for connecting the water heater to your thermostat, which provides added convenience too. With the included remote control, you can now adjust all its settings from inside your home or across the lawn.

Even if you live in a cooler region, you can enjoy more than five gallons of hot water every minute with this water heater. Rheem includes film wrap that protects the working internal parts from damage caused by the elements and adds built-in freezing protection to keep the water heater working on freezing cold days. Depending on the temperature of the groundwater, this tankless hot water heater can produce up to 6.8 gallons of hot water every minute.


9. Rheem RTGH-95DVLP 9.5 GPM Indoor

The Rheem RTGH-95DVLP 9.5 GPM Indoor Direct Vent Tankless Propane Water Heater is really the best tankless hot water heater available from Rheem for larger homes, but it’s also one of the top tankless hot waters on the market today from all manufacturers. A heat exchanger made from stainless steel helps this hot water heater reach an energy efficiency rating of 0.94, which is significantly more efficient than other water heaters on this list. This is also a low emissions tankless heater that will work with an existing propane line but limit the amount of fumes or emissions from that propane.

As long as you have PVC pipe, you won’t have any problems installing this water heater in your home either, and Rheem guarantees that it will work with PVC pipes of two-inches or three-inches as well as lines of up to 38-feet. The connections located on the very top use your existing water lines to keep the water circulating and to ensure that the water reaches the high temperature that your family likes. It also features electronic controls that increase the safety of this water heater, keep the water from reaching scalding temperatures and are easy to use.

This Rheem hot water heater is so small in size that it won’t take up any more space than a medicine cabinet would, and you’ll find that it works great in homes with up to three bathrooms. Depending on the temperature of the water before it reaches the heater and the temp that you set, this water heater has a flow rate of 8.4 to 9.5 gallons of water when used in a home with three bathrooms. For homes with just two bathrooms, this hot water heater reaches a flow rate of between 6.6 and 8.4 gallons of hot water per minute.


10. Rheem RTE 13 Electric Tankless Water Heater

Whether you live in a smaller home, or you live alone, you may want a smaller hot water heater like this Rheem RTE 13 Electric Tankless Water Heater instead of one of the larger ones that rank higher on our list. The RTE 13 lacks some of the fancier features on other hot water heaters but has a simple design that anyone in your family can use to adjust the water temperature. A red light on the front turns on when the tankless water heater is ready to use, and a green light will come on when it enters into standby mode.

It requires just 240 volts and has a modulating power system that automatically adjusts the flow rate based on your needs. The RTE 13 has a maximum four gallon flow rate, a heat exchanger made from a combination of stainless steel and copper and a design that works with any 1/2-inch connection.


Our Top Winner

Rheem RTGH-95DVLN 9.5 GPM

Even after looking at the Rheem RTGH-95DVLN 9.5 GPM Indoor Direct Vent Tankless Natural Gas Water Heater and comparing it to other tankless water heaters, you may wonder if it really is the best one on the market. This water heater has a larger maximum flow rate and electronic controls that make it easy to use. You’ll also love that you can hook it up to all your existing propane and water lines to get hot water anytime you need it.