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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.
|1||RHEEM RTGH-95DVLN||10||Buy on Amazon|
|2||RHEEM RTG-95XLN||9.7||Buy on Amazon|
|3||RHEEM RTG-84XLN||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 RTG-64DVLN ||9||Buy on Amazon|
|7||RHEEM RTG-64XLN||8.6||Buy on Amazon|
|8||RHEEM RTG-64XLP||8.5||Buy on Amazon|
|9||RHEEM RTGH-95DVLP||8.3||Buy on Amazon|
|10||RHEEM RTE 13 ||8.2||Buy on Amazon|
Best Rheem Tankless Water Heater For 2019
1. Rheem RTGH-95DVLN 9.5 GPM Indoor Natural Gas
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 RTG-95XLN 9.5 GPM Low NOx Outdoor
Many people do not understand that the temperature of the groundwater outside plays a key role in the temperature of the water that comes out of their taps, but this Rheem RTG-95XLN 9.5 GPM Low NOx Outdoor Tankless Natural Gas Water Heater does a good job of increasing the groundwater temperature before it ever reaches your taps to help you enjoy hot water every day and at any time of the day. This is both a tankless water heater and an outdoor heater that you install outside of your home. A metal case surrounds the outside to keep all the working components safe from weather and environmental conditions.
Two of the features that you will like the best about this natural gas water heater is its built-in overheating and built-in freeze protection. When you live in the Midwest in a state like Ohio or Indiana, you’ll find that the cold temps outside can wreak havoc on your pipes and plumbing, but this water heater not only keeps the water from freezing in the lines but also keeps the water from coming out at a freezing cold temperature too. With its built-in protection from overheating, you’ll never worry about the heater reaching a critical temperature and shutting down either.
The exact flow rate that you will enjoy depends on how high the water heater must heat the water. If it needs to increase that temperature by 35 degrees or less, you’ll find that it has a maximum flow rate of 9.5 gallons per minute, but if it needs to heat the water by 45 degrees or more, that flow rate will drop to 7.4 gallons per minute. Rheem designed a new burner to work with this model, which allows it to work faster and lets you adjust the flow rate down to less than one gallon per minute.
3. Rheem RTG-84XLN 8.4 GPM Low NOx Outdoor
If you have limited space and are tired of seeing your tank water heater taking up a lot of valuable basement or laundry room space, you can get more room for your thinks when you install this Rheem RTG-84XLN 8.4 GPM Low NOx Outdoor Tankless Natural Gas Water Heater, which goes outside. Though some people assume that outdoor water heaters will only work in warmer climates, this 8.4 GPM water heater is great for cooler climates too. It features built-in protection against freezing that will work in temperatures below the freezing point as well as a heavy-duty metal case that protects the internal components from those freezing temperatures as well as weather conditions like rain or snow.
Before deciding on this model, give some thought to the temperature of the groundwater because this will let you know the exact gallon per minute rating of this water heater. If it needs to increase that water temperature by 35 degrees or less, it will produce up to 8.4 gallons of water per minute, but this rating drops to 6.6 gallons per minute when it needs to adjust the temperature by 45 degrees or more. It has a minimum flow rate of just 0.26 gallons per minute, but you won’t experience this reduce rate unless the water heater has to work overtime to compensate for freezing groundwater.
This Rheem hot water heater is a good option for those with multiple bathrooms too because it can supply two or three bathrooms with hot water, but you should keep in mind that the flow rate will vary based on the number of taps or faucets running at the same time. Rheem includes everything you need to install the hot water heater in an outdoor area and designed it to work with existing plumbing and gas lines.
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 RTG-64DVLN Prestige Low NOx Indoor
The Rheem RTG-64DVLN Prestige Low NOx Indoor Direct Vent Condensing Tankless Natural Gas Water Heater performs just as well as a traditional tank hot water heater does, but it takes up so much less space that you’ll have a brand new storage room in your home once you install it. It comes with direct vent features that help you keep your family safe because those features allow the natural gas to safely vent outside of the home. This low emissions water heater can also help you meet the regulations or standards of your city or state too.
Changing the water temperature with this heater is a lot easier because it comes with a remote control that can work at a distance of 10 feet or more away from the unit. When you live in an area with warmer groundwater, you’ll find that it has a 6.8 gallon maximum flow rate when it needs to increase the temp by 35 degrees or less. Its flow rate drops to 5.3 gallons per minute when used with water at a lower temperature.
7. Rheem RTG-64XLN 6.4 GPM Low NOx Outdoor
Many of the residential shower heads found today use around three gallons of water per minute or less, which means that this Rheem RTG-64XLN 6.4 GPM Low NOx Outdoor Tankless Natural Gas Water Heater will work great in your home because it has a maximum flow rate of up to 6.4 gallons of water per minute. That higher rating also gives you the chance to use hot water in two or more rooms at the same time. It has a minimum activation rate of 0.4 gallons per minute, which is the flow rate necessary for the heater to kick on, and a lower flow rate that lets the heater work when you do not need excessively hot water.
Rheem designed this tankless water heater to work at higher altitudes and in homes more than 9,000 feet above sea level. You shouldn’t worry about using this model outside because it comes with film wrap that completely surrounds the water heater and ensures that cold air doesn’t get inside. This wrap also protects the heater from freezing temperatures too.
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
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.