Many people own large homes with three or four bathrooms, then in the morning, you must get trouble in lacking enough hot water for bathing the same time frequently. The tankless water heater can solve the problem easily, you just need to install a large flow rate and powerful one, then you can enjoy constantly hot water in each room. In order to help you choose the most suitable one, we made the best tankless water heater for large homes reviews for you as follow:
Top 8 Best Tankless Water Heaters for Large Homes
How to Choose the Best Tankless Water Heater For Large Homes?
Getting a tankless water heater for a big family or a large home can be very challenging if you do not know how to go about it, before picking on any brand of these devices there are various considerations to make to get the best device for your home. these may include:
This does reflect on the number you’ll need for your home, when you are alone one device may cater for all your hot water needs, but in the case of a large home or family, this means more people and more people means more hot water, the hot water may be used for more than one purpose around the house which in most cases is the shower, you may need hot water for your washing machine, dishwasher, bathtub. This means that you’ll need to get more units to at least support the average usage of hot water around your home.
Different people have different views when it comes to how hot they like their water, or to what extent they will heat there water. To pick the best tankless water heater you’ll need to know the temperature of the water coming to your home, heat map tools can help you find out all about this. In warmer climates, you’ll need a less powerful tankless water heater device and in cold climates then you’ll require a more powerful device.
Size of the tankless water heater
This is always a challenge to customers, you’ll need to know the amount of hot water you use in your home and also put in mind how much temperature the other home appliances can withstand. Water takes time to heat, so the greater the needed temperature, the larger the device. A larger tankless water heater is also needed when there are more people using hot water or when using all the other appliances at the same time.
The water flow rate
This is a factor that also affects the size of the tankless water heater to be picked, knowing how much water comes in and at what temperature on the house appliances that use hot water.
Tankless water heaters have three ways to power up, electric, propane, and natural gas. If your device is electric-powered you have to consider challenges that come with electricity, some homes may have weak electricity systems. This makes it harder for them to pick a tankless water heater that is electrically powered. propane and natural gas devices are mostly considered as the best solutions for hot water needs since they are more powerful than the electric units.
Maintenance of the device
Maintenance is very key when thinking of such a device for your home. Annual servicing will increase its chances of serving you better achieving a longer life expectancy of the tankless water heater. Proper maintenance of this device is best done with experienced technicians in water heating devices.
Best Tankless Water Heaters For Large Homes
1. Stiebel Eltron Tempra Plus 24 kW Tankless Water Heater
- Flow Control System
It is equipped with the advanced flow control system, when multiple bathrooms are using the same time, the system will automatically control water temperature, to make sure it does not drop. Thus it is suitable for people in demand of occasional hot water, too.
- 5 gallons per minute of water flow
5 gallons per minute water flow rate maybe not a super high rate, but it is still capable enough on providing hot water for two or three bathrooms in large homes. It works best in an area where supplied water is under 45 degrees F.
- Flow control modulation
It supports full power modulation, and built-in advanced flow control modulates are used to regulate the water pressure automatically. It is able to raise the water by 54 degrees F at 3 GPM.
- Compact shape, convenient to install anywhere at home
- High-level electronic parts and reliable cover
- Quiet working performance
- High energy-efficient, it is said to get 99% thermal efficiency
- The most technologically advanced electric water heater
- Powerful machine
Difficult to install, needs 240v power and heavy-duty wiring
2. Rinnai RUC98iN Ultra Series Tankless Water Heater
- Large flow rate
The flow rate of this unit reaches as high as 9.8 gallons per minute, thus it is a perfect tankless water heater for large homes, especially for a family with three or four bathrooms. And natural gas as a power source makes it a much more powerful other types.
- Energy efficient
The power requirement of it ranges from 15200 to 199000 BTU per hour, which is powerful enough to provide constantly hot water for you. But you need only 2 watts to keep the machine up and running.
- High-temperature range
The temperature range for residential use is from 98 degrees F to 140 degrees F, if for commercial use, it reaches as high as 185 degrees F. 0.95 high energy efficient rating saves much money for you. When used for large homes, it is able to provide stable water flow for you.
- Offer 2 venting options, concentric PVC and twin-pipe, so you can choose one that is easy to be installed
- Short waiting time for hot water, only takes about 20 seconds
- Quiet working condition
- Powerful enough to serve for three or four bathrooms use simultaneously
- Commercial and residential use available
- High flow rate and powerful machine
Needs to be installed by professional
3. Rinnai RL94eP Propane Tankless Water Heater
- High-temperature range
Like the above RUC98iN series we recommended, this unit is also able to support water temperature up to 185 degrees F. It means it can be used as a commercial tankless water heater too.
- High flow rate
It is capable of supporting 9 gallons of water per minute for you, and because of its powerful internal design, it can provide constantly hot water for multiple bathrooms such as three or four bathrooms use the same time for southern areas, and also two bathrooms in cold regions.
- Easy operation
The dial is easy to use and you can adjust the needed temperature easily, water temperature and error codes show on the screen. Self-modulating technology enables it to turn on only when you need hot water.
- Save much money for heating costs in utility use
- Delicate internal design for stable water temperature
- Energy efficient
- Easy to get the temperature you want
- Commercial and residential use
- Perfect for large family use with powerful water supply
- Difficult to install, you’d better get a professional for help
- Waiting time for hot water is a bit long
4. Rheem RTG-95XLN 9.5 GPM Low NOx Outdoor Tankless Natural Gas Water Heater
- Large flow rate
9.5 GPM high flow rate heating machine of this supports constantly hot water for three or bathrooms easily in warm areas. When used in cold regions, the flow rate drops 2-3 GPM, but still able to meet the demand of two bathrooms use the same time.
- Outdoor installation
It is said to be an outdoor installation unit, but you can still install it indoor. Both propane and natural gas are available and the thermal efficiency reaches as high as 94%, which means seldom energy is wasted.
- Remote control
It is equipped with EcoNet smart home technology to control the machine remotely through the app. Dual venting gives you more options when water demand is high.
- High energy efficient
- Stainless steel heat exchanger equipped
- The large flow rate of water
- Both propane and natural gas available
- Outdoor use, requiring no venting
- Supports 3 or 4 bathrooms use the same time
High installation cost
5. Takagi T-K4-IN-NG Tankless Water Heater
- Powerful machine
The power range of the machine is from 11000 to 190000 BTU per hour, thermal efficiency is 0.83. Takagi boasts that the hot water output is not affected by the climate, it means it keeps stable and constant no matter for the weather or for the regions.
- 8gpm flow rate
Compared with other recommended best tankless water heaters for large homes, the flow rate of this one is quite low, but it is still able to support 2 or 3 bathrooms use the same time and the water flow stays stable all the time.
- Smart technology inserted
It is equipped with a self- diagnostic system, the led light with water temperature and error codes show off on the console panel. Internal freeze protection system prevents the machine from being frozen. Remote control raises the water temperature to 167 degrees F for commercial use.
- You are free to install it vertically or horizontally
- Commercial and residential use available
- Freeze protection system
- Both indoor and outdoor installation
- Stable and constant hot water supply
- Self-diagnostic system for self-protection
Buying and installing remote control is an extra cost
6. Takagi T-H3-DV-N Natural Gas Indoor Tankless Water Heater
- Super huge flow rate
The flow rate of this unit reaches as high as 10 GPM, a perfect one for a large family with three or four bathrooms and multiple faucets use the same time. The released hot water temperature reaches up to 185 degrees F. So you can also use it for commercial use.
- Pretty powerful for constantly hot water
It demands 199000 BTU per hour to perform in its best performance, along with the natural gas power source, it is capable enough on providing constantly hot water for you. Though with large flow rate and powerful performance, it weights light and you can install it anywhere you want.
- Remote control
You can integrity it with remote controller and control it in other rooms. But for large home use or multiple bathrooms use, the waiting time for hot water may be a bit longer, takes about 1 minute approximately.
- Set up simply by adding several gas line
- Support constantly hot water for multiple bathrooms use
- Large powerful machine
- Remote control available
- Weight light
- Dual venting options
- The flow rate will be lowered when used in cold regions.
- Waiting time for hot water can be a bit long
7. Naiven NPE-240-A Tankless Gas Water Heater
- Built-in recirculation pump and hot buffer tank
This unit has a built-in hot buffer tank and recirculation pump to eliminate cold water sandwich and save water bills by reducing time to get hot water. It also saves much money on buying an extra pump for constant hot water.
- Powerful and large flow rate
The flow rate of this unit reaches around 9 GPM, it is good at keep water temperature, even when you start using multiple bathrooms the same time, you can still get stable and constant hot water. When the water temperature drops suddenly, it will quickly correct to the original level.
- Condensing technology to save energy
The condensing stainless steel heat exchanger recovers extra heat that is not used to reduce energy consumption and carbon dioxide emissions. It provides up to 0.97 UEF, thus is highly energy efficient.
- Highly technological machine
- Clear installation and using instructions
- Short waiting time for hot water
- Intelligent preheating system
- Easy operated external interface
- Stable water temperature
- Slight working noise
- Do not come with a remote controller
8. Noritz NR981-SV-NG Indoor-Outdoor Tankless Water Heater
- Large flow rate
Flow rate range of this unit is from 0.5 GPM to 9.8 gallons per minute, capable of offering hot water for three or four bathrooms used in the southern area, and two bathrooms in the northern part. Temperature range is between 100 to 140 degrees F.
- Large power
The gas consumption requirement is between 16000 BTU and 199900 BTU per hour, low NOx design helps reduce emissions of greenhouse gas and carbon dioxide. Together with natural gas power, this unit is powerful enough on providing constantly hot water for you.
- Elevation adjustment
It has 9 heating options and enables remote control. The elevation is adjustable, so you can use it in altitude easily. The heating machine is well made, adopts commercial-grade copper wall that is 25% thicker than normal models, thus has a long service life.
- Endless hot water provided
- Capable of supporting multiple bathrooms use
- High flow rate
- High efficient
- Remote control enabled, but you need to get an extra remote controller
- Elevation adjustment for altitude
Takes a little time for hot water flowing out
Best Electric Tankless Water Heater For Large Homes
Most of the electric tankless water heaters are used for tiny home or travel, because of their small power range. But there are also one best electric tankless water heater for large homes we would like to suggest to you:
Stiebel Eltron Tempra Plus 24 kW Tankless Water Heater
This machine is powered by electric, and it is always listed as the top-selling electric tankless water heater on the market of 2020. Tempra Plus series is an improvement of Eltron heater, this series is more powerful and higher temperature range and flow rate.
Smart technology such as flow control regulation is also added to regulate water pressure when water demand becomes high suddenly. Therefore, this can be highly recommended electric types for you. Check out for more if you have an interest in the unit on Amazon.
What Size of Tankless Water Heater Can Be Used For Large Homes?
The size of tankless water heater that can be used for large homes, is determined by how many people are in the house or how many household appliances that need the hot water, in large homes a lot of water is expected to be used on household appliances and on the occupant’s activities around the house.
Smaller size tankless water heaters will not be efficient in this case, since they will only serve maybe a number of bathrooms leaving all the other household appliances that may need the hot water.
For you to pick the best size, take the average capacity of water that your house can use in a day and their specific variation in temperature as a specification needs on your tankless water heater, the best size will heat up all the water you run through them for every appliance that needs the hot water to serve perfectly. This can also be determined by adding the rate of flow of each appliance in the house that needs the hot water.
Bigger tankless water heaters in a large home can serve well. All manufacturers have their size chart in place to guide the customers according to the total capacity gallons of water they can use in a day making it easy for you to get the best size that fits your hot water needs
Features Of Best Tankless Water Heater For Large Homes
For each different types of tankless water heaters, applications and flow rates differ a lot. Some are used for small tiny homes, some are used for commercial or even industrial heater, while some are used for large homes.
When used for large homes, we normally mean there are multiple bathrooms and faucets and they need to be used simultaneously for daily use. In such occasion, there is something you need to consider in choosing, so here we offer the features of best tankless water heater for large homes or buying tips for you.
1. Whole house type
Most of the tankless water heaters for large homes are whole house types, they need to be able to support multiple bathrooms or kitchen faucets use. If you intend to get a point of use one, then you may need to get several of them and install right near the application fixture, which is highly costly and occupies much space by adding multiple heaters at home.
2. Large flow rate
Large flow rate tankless water heaters can meet the demand of multiple uses, you will have endless hot water and enjoy satisfying bathing.
3. Large power
To support constantly hot water for multiple bathrooms, the power range of the unit must be large enough. Some tankless water heaters have a large flow rate, but they still can not be used for whole house especially for large homes use because of their small power.
4. Energy efficient
Because of the large power requirement, the heating machines for large family use are normally gas or propane types. Therefore, a high energy-efficient tankless water heater can not only help save money but also helpful in reducing carbon dioxide and other greenhouse gas emission.
5. Smart functions
Some of the best electric tankless water heaters for large homes are equipped with smart devices or technological design, such as self-modulating system, in order to adjust and maintain water temperature and pressure when the demand of water is high. With smart functions like that, you are able to enjoy stable water flow.
Unlike point of use tankless water heater, heating machines for large families need to transfer and support hot water for multiple spots. Therefore in installation, you need to consider the waiting time, in other words, the distance between the heating machine and taps. Choose a place that is suitable for each spot of hot water use.
Types Of Tankless Water Heaters For Large Homes
Altogether there are three types of tankless water heaters based on the power source, they are electric type, propane type, and gas types.
Electric tankless water heaters are normally regarded less powerful than propane and natural gas type, therefore, most of them are designed as a point of use types, or you can carry it for use in traveling and camping. Therefore, most of the recommended heaters on our reviews are gas and propane types.
Propane tankless water heaters are quite the same as natural gas, the energy efficiency, power and also greenhouse gas emissions are quite familiar as gas do.
Natural gas tankless water heaters are more powerful than other types, and using heating costs for long term use is quite cheaper. Most of the whole house or family with 3 or 4 bathrooms are suggested to get a natural gas type to support hot waters constantly.
If you intend to get more information and the comparison of the three tankless water heaters, you can check out freely on our reviews.
What We Pick Is…
Among all the types of tankless water heaters, we would like to suggest Rinnai RUC98iN Ultra Series Tankless Water Heater for you, 9.8 GPM high flow rate enables to support constantly hot water for you, and high power consumption requirement between 15200 and 199000 BTU per hour enable it to be a best tankless water heater for 3 bathrooms or even more bathrooms. It is powerful enough to support multiple users and still keep water temperature stable.
Dual venting options and natural gas power required help reduce greenhouse gas emissions and also reduce your heating costs as much as possible. If you have any interest in such item or intend to get more information as well as price details, please check out freely on Amazon.