10 Best Tankless Water Heater For Large Family – Reviews + Buying Guide 2022

Do you own a large home with three to four bathrooms and find yourself soaking in the cold bathtub or running out of hot water while doing laundry very often? If so, you need to invest in the best tankless water heater for large family. 

Insufficient tank storage water can be a real inconvenience. A big household requires a large flow rate in addition to hefty power. The heater should be equipped with advanced technology to balance water temperature. 

All of these requirements make the hunting for the appropriate heater a daunting task. But today is your lucky day! We have spent countless hours comparing the prices and specifications of different models and reading reviews from owners to find out the best tankless water heaters available in the market today for every possible situation. 

This guide has reviewed multiple large flow rate best tankless water heater for large family cold weather. According to your own needs and household demands, you can pick the right one by taking help from our review and buying guide.

10 Best Tankless Water Heater For Large Family

1. Rinnai RUC98iN Ultra Series Indoor – Best Overall

With a space-saving design, this best gas tankless water heater for large family can be installed anywhere. It is manufactured with excellent quality materials and requires less space for installation. 

This unit meets the ultra-low NOx emissions standards. The environment-friendly device operates on natural gas with a maximum input of 199,000 BTU/H. It can be utilized for commercial properties, and it offers PVC and concentric venting options. 

Most of the units from Rinnai are equipped with advanced technology for heating the water. However, this product features condensing technology that takes the water heating a notch. The technology has made it able to supply water more efficiently. 

Its energy-efficiency rate is 96%, so it can help you to lower your power bills. Rinnai RUC98IN heater functions with a uniform energy factor of 0.92 and an energy factor of 0.96. Both of these features make it one of the best energy-efficient gas tankless heaters available in the market.  

If we talk about the flow rate, this device flaunts a very high water flow rate pressure. That’s why; it operates with a maximum flow rate of 9.8 gallons per minute. 

However, it generates warm water at the faucets with a maximum pressure of 150 PSI. You can use warm water for numerous purposes, such as showering, handwashing, and dishwashing, etc. simultaneously. 

The best tankless water heater for large family cold weather comes with a web stone lead-free isolator EXP 2 Valve kit with cold and hot water valve assembly and 150 PSI pressure valve. 

You will also obtain a Rinnai MC-91-2US door-mounted controller with it. It is integrated with a digital temperature controller that permits you to fine-tune the temperature effortlessly. 

As a consequence, it becomes easier for you to operate and use this device. Just like other tankless heaters, this system also arrives with a compact design so that you can save valuable storage space.

Specifications:

2. EcoSmart ECO 27 Electric Tankless Water Heater

EcoSmart Eco27 is the best electric tankless water heater for large family. This energy-efficient unit promises to decrease your water heating bills by 50%. 

It is equipped with self-modulating technology. Its heating chambers enable it to utilize only the amount of electricity needed for heating the water. 

EcoSmart Eco27 is capable of delivering 3 gallons per minute only when the groundwater temperature is below 37F. With this flow rate, you can expect to obtain unlimited hot water for two showers simultaneously.

This device flaunts a marvelous limited lifetime warranty on electronics, heating components, and exchangers if we talk about its warranty. To take advantage of the warranty, make sure a professional mounts the unit within 30 days of purchase. 

Speaking of its value, this electric tankless system is available at a very economical price. It allows you to save a considerable amount every month on energy bills, thanks to its self-modulating technology. 

The initial price, limited lifetime warranty, and numerous exceptional features make this appliance hard to beat. However, bear in mind that if you are purchasing it to transition it with a tank storage unit, make sure your home’s current power system can support this machine. 

You are aware that electric units require a hefty amount of electricity to function correctly. So, if you own an older house, you will have to upgrade your power system to increase the initial cost automatically. 

Its compact design is another impressive feature. The overall size of this device is four times less than a tank heater. So, you have the freedom to fix it anywhere you want in your house and save valuable space. 

It vaunts a high-speed heating efficiency, which is 0.3 gallons per minute. This feature makes it perfectly suitable for big families. Additionally, digital temperature control with 1-degree increments permits you to regulate the temperature of the hot water. You can determine how hot the water should be. 

Specifications:

3. Stiebel Eltron 232886 Tempra 36

This model has thoroughly removed the hassles of venting. The new generation is loving the sleek and elegant design of this water heater.  

It is a powerful electric heater equipped with smart microprocessor technology, which allows you to fine-tune the temperature according to your needs and receive that temperature every time you use the warm water. 

If we compare this model with competitors, there are minimal chances of uneven temperature. It takes advantage of the advanced flow control to maintain temp. The flow control cuts back on the flow if the water demands grow too much. 

The process of setting the temperature is very simple, thanks to its digital display. It shows the weather and flaunts two preset temp memory keys utilized for monitoring water flow and cost savings. 

The appliance is designed for easy installation, and it has a compact size so that you can mount it anywhere. However, it is better to fix it near the hot water outlets. In this way, you won’t have to wait for a long time to acquire hot water. 

This best tankless water heater for large family cold weather boasts a hinged cover that is super easy to open. Stiebel Eltron Tempra 36 Plus is made of high-quality materials to maintain durability and function properly.

You will see temperature and flow sensors, electronic control module, copper heater, and other components on the inner side. These components are associated with each other in different stages to support the system to attain the desired settings efficiently. 

Best of all, while using this device, it is guaranteed that you will never run out of hot water. Moreover, it offers a seven years leakage-free operation so that damages won’t occur any soon. This tankless machine will help you save up to 15 to 20% electricity and reduce power bills.

Specifications:

4. Bosch Electric Mini-Tank Water Heater

As the name suggests, it is a mini-tank electric heater that is manufactured to be utilized at a point-of-use. It can be installed on the wall or fitted beneath the sink. This particular model is highly suitable for supplying warm water in just one area. 

Talking about its warranty, Bosch mini-tank unit flaunts a 2-year warranty on parts and a 6-year warranty on the container itself. If you want, you can combine it with a bigger water heating system. 

The product comes in a small size, but it is well thought out. The container is glass-lined, so you can expect to use it for a long time. CFC-free foam is insulated in it that makes it more energy-smart. It boasts an energy-efficiency rate of 98%. 

As it has a smaller size, so it can provide water for a sink or a small washing machine, but not at once. It can be used for a small region, but not for a larger area such as a bathroom or kitchen. 

The best tankless water heater for large family cold weather comes with a simple and stylish design so that you can fix it in your house easily. It does not take as much space as a tank storage heater does. 

Best of all, it heats the water quickly, so there is no need to wait for the water for prolonged periods. In addition to that, it offers you three options:

The brand is reputed for manufacturing more excellent quality products, so you can rest assured that you are making the right purchasing verdict. There is an external dial that permits you to regulate the temperature range effortlessly. A temperature and pressure relief valve is integrated to ensure your safety.

Specifications:

5. Camplux ME25 Mini Tank Electric Water Heater 

The Camplux M25 is the best electric tankless water heater for large families. This 2.5-gallon water heater is designed to provide hot water whenever you need it. Due to its sleek and compact design, you can easily install it under the sink or on the wall or floor for point-of-use service. 

Its container is made of glass-lined material, so it is easy to maintain and offers a long service life. To obtain hot water, you will have to connect it to a cold water tap, and then, it will heat water to the desired temperatures. 

This energy-efficient product can dramatically reduce energy costs. Additionally, you won’t have to waste precious time waiting for the hot water to reach the faucet. 

This lightweight unit flaunts a thermostat control that lets you easily adjust the water temp. When you set it, it automatically controls the temperature. 

You can take advantage of this model as an individual water heating source for a sink or connect it to another heating system far away from the sink.  

When you don’t use the hot water for a long time, the chances of freezing increase. However, you can turn the thermostat knob to a snowflake position. This function will prevent the water from freezing. Otherwise, you can unplug the machine and drain the water. 

The Camplux Me25 mini water heater has an external dial that permits you to control temp ranges. It is also equipped with temperature and pressure relief valves to ensure your safety.

It boasts a high-efficiency heating element and fast recovery rate so that the water will reach the faucet very quickly. This machine is manufactured with a 43.3 cord that makes the installation very easy. 

The distance of the warm water supply is short, so it reduces heating losses. With this outstanding model, you can save time, electricity, and of course, money. 

Specifications:

6. Rinnai RL Series HE+ Tankless Hot Water Heater

Rinnai RL series HE+ is the best gas tankless water heater for large families because it can produce 9.4 GPM. It can supply constant hot water to five plumbing and appliance outlets at the same time, ensuring that you will never run out of water.

This model can easily handle a medium-sized family, only if the hot water demand is not too high. It is equipped with circ-logic technology that intends to improve efficiency even more. It can attain up to 40% energy-efficiency compared to a traditional unit. 

This appliance arrives with a compact size, which means you will be able to mount it in non-traditional spaces such as the attic and crawl space, etc. It is small enough that it can conveniently fit into a might closet. It can help you to save up to 16 sq. foot of space as it boasts the size of a tiny suitcase. 

The reliability of the Rinnai RL series HE+ is top-notch. You can take advantage of this superior quality unit for at least 20 years. The average lifespan of a conventional heating system is only 7 to 8 years, so it is a smart investment for now and the future. You can save both your money and worry in the long run. 

A good thing about it is that all of its parts can be replaced easily and you won’t have to spend a massive amount on their replacement to get hot water. 

On the downside, the best tankless water heater for large family can work with propane only. Propane is indeed cheaper than electricity, but it is unavailable in many regions. 

Its installation process is uncomplicated and hassle-free, and it is highly suitable for outdoor settings. It features a residential factory warranty of 120 months that surpasses the competition and provides you peace of mind.

Specifications:

7. Rinnai RUR199iP Tankless Water Heaters

Rinnai RU199iP is an indoor tankless water heater that uses propane as a fuel. It is designed to provide endless hot water for the entire family. 

The system uses condensing technology and ultra-low NOx operation. Both of these technologies make it environment-friendly. 

It can provide up to 11 gallons per minute, so you will never have to take a shower with cold water again. 

It is armed with ThermaCirc360 technology that recirculates hot water through the pipeline, so you will be able to acquire water quickly. The product features a compact design, which means you can deploy it in tighter space such as closet, attic, under the sink, crawl space, etc. It has only the size of a small suitcase. 

Best of all, the control-R 2.0 application makes the best tankless water heater for large family cold weather stand out among others. By using the app, you can easily schedule the system all through the day. You can also set it to vacation mode from a remote location. 

It is made of premium quality materials, so you can expect to utilize it for at least 20 years. Rinnai RUR199iP has an integrated recirculation pump, thermal bypass valve, and a timer, so it is perfect for larger homes. 

It is an energy-efficient model that uses 40% less power than a storage water heater because it heats water only when you turn on the tap. 

If we talk about its warranty, it flaunts a 10-year heat exchanger warranty, 1-year labor warranty, and 5-year parts warranty.  

The downside of this unit is that when the power goes out, the water temperature resets. It does not matter what the temp was before the power outage. In addition to that, you can’t take advantage of the app to control the recirculation setting. 

Specifications:

8. Rheem 240V Heating Chamber RTEX-13

Rheem 240v RTEX 13 is an ideal water heater for single point-of-use or multiple applications. It is 99.8% energy-efficient and has a digital temperature display that allows you to adjust the temp in increments of 1-degree. 

The range of temp is from eighty degrees to one hundred and forty degrees. The model is equipped with copper heating components with brass tops that increase its durability. These components are threaded for stress-free replacement. 

If we talk about its water flow rate, the system flaunts a minimum flow rate of 4.8 GPM. This heater is designed to be installed indoors only. 

The electric tankless water heater for family of 4 arrives in a minimal size so that you can install it in the cabinet, beneath the sink, or any other non-traditional space. Only a few screws are required to fix this appliance on a wall. 

When it comes to power usage, it only needs 13kW at 240v to function correctly. To ensure safe use, you will need a one 60-amp double pole breaker as well. 

This machine is covered by a five-year “no leak” guarantee, but the parts are covered for only one year. However, its drawback is that you can’t expect high performance from it in colder climates where the groundwater is cold. 

If it has to raise the temperature by 65 degrees, the hot water flow rate will be 1.37 GPM, which is good enough for a single point-of-use.  

It has user-friendly controls on the front face that enables you to change the water temperature instantly. All is done through an LED display system. After installation, you just have to select your desired temp, and it comes through. 

The most significant advantage of using the Rheem RTEX 13 is that it provides a constant supply of perfectly heated water on-demand. It works without a tank, so there is no need to worry about the warm water limit.

Specifications:

9. Noritz NRC66DVNG Indoor Condensing Direct 

It is an indoor direct condensing model that will impress you with its extraordinary performance and power, despite its sleek and tiny size. This lightweight product is perfectly suitable for little to medium-sized houses and offices. 

It boasts a modern design and is super easy to install and operate. If you want, you can also install it yourself, but we will recommend you to hire professional services. The good thing about Noritz NRC66DVNG is that it requires minimal maintenance and has fewer power necessities. 

Speaking of its technical specifications, the appliance weighs less than 40 pounds. However, it can supply a flow rate of up to 6.5 gallons per minute. You can take advantage of it for residential and commercial applications. 

It is equipped with innovative heat exchanger technology and an integrated controller that describes its reliable performance. These features help the unit provide constant and consistent temperature no matter what the flow rate is. 

The heater has a compact design, so homeowners can hang it anywhere they want. Another thing we loved about Noritz NRC66DVNG is that it allows you to schedule the operation in whichever way you want. 

The leak-proof manufacturing and numerous venting options make this heater stand out as one of the most energy-smart units in water and power usage. It can decrease the power costs by 60% in a year. 

The system functions with PP, PVC, and CPVS pipes. It does not only offer different venting options but other terminations and adapters as well. All of these characteristics make it effortless for you to operate the appliance. 

You will not notice that the heater is working because it operates silently. With this machine, you will obtain an instruction manual that is extremely easy to understand and will help you in the installation process. 

It is armed with two heat exchangers, one is made of copper, and the other is made of stainless steel.

Specifications:

10. Takagi T-H3-DV-N Condensing Natural Gas Tankless Heater

The Takagi T-H3-DV-N is the best gas tankless water heater for large family. It is built for indoor installation and can be used in both commercial and residential properties. If you want, you can also deploy it in beauty salons and small restaurants. 

The best thing about it is that it complaints with regulations on Ultra-Low NOx Emissions. The heat exchange tubing of this product is manufactured by using the grade copper alloy that transfers the heat 25X better than stainless steel. 

It can support up to three showers in colder climates. However, it can handle four showers at a time in warmer temperatures. You can also take advantage of it for radiant floor systems, storage tanks, and recirculation systems. 

If you don’t want to use the multiple units controller, you can rely on the easy-link feature to regulate it to support up to four units. However, by using the various unit’s control, you can connect 20 units at once. 

To ensure your safety, the brand has integrated numerous protective features into this machine. It provides freeze control, surge protection, and many other features. It satisfies the standards of having no lead components, so your safety is guaranteed with this heater. 

Speaking of its flow rate, it can generate up to 10 gallons of hot water per minute. However, the electric units are designed to supply only two to five gallons of water in one minute. With this model, you will obtain constant and unlimited warm water for taking a shower, washing utensils, and doing laundry. 

This best tankless water heater for large family cold weather works differently. Its steam condensation happens in a combustion chamber. Once the water is generated, it will be pushed out of the drainage system. 

Its working process is more energy-efficient and clean compared to other gas heaters. When the heat exchangers and internal burners sense the cold water in the heater’s lines, they start working immediately. It means, when you turn on the faucet, you will get hot water instantly without running out of supply.

Specifications:

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Best Tankless Water Heater For Large Family – Buying Guide

Acquiring a tankless water heater for a large household can be an intimidating task if you are confused about where to start. Before picking any device or brand, you have to consider some essential factors that are as follows:

Flow Rate

When you use a tanked water heater, you are always worried about running out of warm water. However, the prime issue of the tankless unit is how quickly it can produce hot water. All the tankless devices provide a never-ending supply of the water, which usually varies is the flow rate. 

Before purchasing any machine, make sure to check its flow rate specification. A system with a high flow rate will be able to fulfill your water demands more quickly.

Moreover, considering the flow rate is imperative if you have a family of four. To choose the correct heater, ensure you are obtaining the right capacity that matches your individual needs. 

Power Source

The best tankless water heater for large family cold weather has three ways to power up: electricity, natural gas, and propane. If you want to buy a gas-powered heater, it will be more efficient and cheaper. 

However, they require proper ventilation to eliminate the by-product gases. It tends to perform better in colder climates compared to electric heaters. To fully take advantage of the gas unit, you must pick the right manufacturer and model. 

On the other hand, electric systems are relatively expensive, but they do not produce harmful gases. They are clean, energy-efficient, and also don’t need a ventilation system. 

The majority of electric models are 98% energy-smart, so they will help you to save money on electricity bills in the long run. These units are more prevalent among people than gas and propane-powered appliances.

Units

A large house or family means more individuals, and more individuals represent a higher demand for hot water. In a mighty household, people need warm water for more than one purpose, such as taking a shower, washing clothes, cleaning dishes, filling bathtubs, making coffee, etc. 

It means you will have to obtain more units to fulfill the hot water demand around your house. You can opt for one unit with a higher water flow rate or install multiple single point-of-use heaters. 

Size

If you need a heater for a home with three or more bathrooms, you have to determine the model’s size. A bigger size means higher capacity. 

While determining the size, also consider the temperature of incoming groundwater and output temperature. Folks who live in colder areas should buy bigger size units.    

Temperature Rate

People have different opinions regarding how warm they want their water to be and how much they will heat their water. 

Therefore, before picking a product, make sure to determine the incoming water temperature of your house. For this purpose, you can rely on the heat map tools. 

If you are located in an area with warm climates, you can get a less powerful machine. However, in colder climates, you will need a powerful tankless heater. 

Energy-Efficiency

A water heater has a great impact on the energy expenses of a house. That’s why; try to get a model that saves energy as much as possible. 

You can assess the heater’s energy-efficiency by determining how efficient it is in conveying heat energy from the source to the water. 

Typically, the best electric tankless water heater for large family is more energy-efficient than tank storage units. They use energy only when you turn on the tap, and water is heated as it is being utilized. 

Furthermore, when you use a tanked device, minerals accumulate, which decreases the water’s efficiency. According to studies, using a tankless heater can save up to 50% on electricity costs. 

Maintenance 

Maintenance is an essential factor that must not be overlooked at all. Annual servicing of the unit is critical as it will boost its life expectancy. A professional technician must do proper repair and maintenance. 

Venting

The best gas tankless water heater for large family works by burning fuel. When it burns the fuel, it generates exhaust that must be vented outside of the residence away from the windows and doors. The installation of a venting system can skyrocket the initial costs of the tankless machine.  

How To Select The Right Size For The Best Tankless Water Heater For Large Family?

The size of the best gas tankless water heater for large family is determined by how many folks live in the house or how many appliances need warm water. In big houses, people need warm water for different activities.

Similarly, appliances require hot water as well. In this case, a smaller size model won’t meet your demands because they are designed to provide the water for one bathroom or one shower at a time. 

First of all, to select the appropriate size, evaluate the average capacity of water that your house needs in a day. Also, determine their specific variation in temperature. 

The right size will have the capacity to heat up all the water you will run through it for every appliance. Otherwise, you can add the flow rate of each device in your house that needs warm water. 

A water heater with a bigger size will serve well in a large house. Before ordering a unit, make sure to check its size chart to know how many gallons of water it can produce per minute. By following these tips, it will become easier for you to pick the right size. 

What Are The Features Of The Best Tankless Water Heater For Family Of 4?

There are multiple types of tankless water heaters, so their flow rates and applications are also different. Some models are appropriate for small houses, some are suitable for commercial and industrial properties, and some are perfect for larger households.

A larger house has multiple bathrooms and appliances. Every day, they need to be utilized at the same time. Therefore, there are some significant features that you have to consider before buying a unit. 

Smart Functions

The best gas tankless water heater for large families is equipped with smart technologies such as a self-modulating system that regulates and preserves water temperature and pressure when water demand grows too much. The intelligent functions are responsible for providing a stable water flow.

High Flow Rate

A heater with a large flow rate can meet the demands of numerous appliances at the same time. It will help you acquire an unlimited supply of warm water without waiting for a long time. 

Whole House Heater

The majority of tankless units for big families are whole house types. They are capable of supporting multiple bathrooms and kitchen outlets that you use at the same time. 

If you are willing to obtain a point-of-use device, you will have to install several machines right near the application fixtures that can be extremely expensive and occupies a lot of storage space. 

High Power Requirements

To deliver hot water for multiple bathrooms and kitchens, the machine’s power requirement should be high enough. Some devices have a high flow rate, but you still can’t use them for large houses because of their small power range. 

Energy-Smart

The heaters for larger families have high power requirements. So, it is better to opt for a gas or propane tankless unit that is highly energy-efficient. It will help you to save money and also reduce carbon dioxide and greenhouse gas discharge. 

Condensing Vs. Non-Condensing

The fuel in the gas tankless heater produces steam or water vapor as a byproduct. The steam must be released to the outdoors through ventilation pipes or ducts. The water vapors are acidic and will corrode all types of appliance materials in your house. 

Non-Condensing

These units instantly vent steam. To vent steam, it is necessary to use high-quality and durable ventilation materials to withstand high temperatures. These superior quality materials are costly, so as a result, installation costs will increase. 

This style produces about 80 to 85% energy-efficiency. These heaters work on-demand and are mostly deployed near the point-of-use faucets such as showers and taps. 

Condensing

These devices have a condensing unit that is responsible for capturing and reusing the exhaust heat. After that, it releases a much cooler exhaust through the ventilation pipes or ducts to the outside. This entire process demands more money but creates about 98% energy-efficiency. 

The most significant advantage of this heater is that it does not require an expensive venting system because the gasses are cooler. It generates exhaust gas that is around 100 degrees. 

Frequently Asked Questions