When you’re on the search for the best commercial tankless water heaters, your preference is most likely a BTU unit that offers a super flow rate. We’ve checked out the list of reputable tankless water heater brands and have complied our list of models that we think won’t “break-the-bank”. In a comparison of the best commercial tankless hot water heaters, we think we’ve narrowed it down to provide you with the top overview of the most important details.
This Rheem Commercial Hot water tankless heater is the best
Commercial tankless hot water heaters can be widely used in brewery, hotels or Laundromats and other public places fro providing steady hot water. Here we offer you the best commercial tankless water reviews to wow your mind
The 8 Best Commercial Tankless Water Heaters of 2020
|#1. Rinnai RUC98iN Ultra Series Tankless Water Heater
|#2. Rinnai RL75iN Natural Gas Tankless Water Heater
|#3. Rinnai RL75eN Natural Gas Tankless Water Heater
|#4. Rheem RTG-64XLN Tankless Water Heater
|#5. Stiebel Eltron Tempra Plus 24 kW
|#6. Takagi T-K4-IN-NG Tankless Water Heater
|#7. Noritz NC380-SV-ASME Tankless Natural Gas Water Heater
Above is a quick overview of the best commercial tankless water heaters reviews
This sits at #1 of our best commercial tankless water heater for restaurant, brewery and many use and for good reasons.
- High-temperature range
For commercial use, the temperature can go as high as 185 degrees F, and it perfectly meets the demand of constantly large flow hot water supply. However, you need to get additional commercial remote controller.
The highest temperature for residential use sits at 140 degrees F too.
- Large flow rate
The flow rate of this unit tops at 9.8 gallons per minute, and its large flow rate allows endless hot water gush out when you need it. The power requirement ranges from 15200 to 199000 BTU per hour. But it needs only two watts to keep the machine up and working.
- Short waiting time
It takes about 20 seconds for the water to heat up, and as soon as it does, you will have limitless hot water. The working noise can be a little heard. It provides you with 2 venting options, twin-pipe and concentric PVC for durable choice.
- 5 year warranty on heating parts
- No evident noise can be heard
- 0.95 high energy rating
- Two venting options
- High temperature range with commercial remote
- Needs only 2 watt to keep machine up and running
Need to be installed by professional
Another best commercial tankless gas water heater
- 160 degrees F temperature
The highest temperature for this commercial product reaches to 160 degrees F, of course, you need also buy the remote controller separately. Residential temperature range is between 98 to 140 degrees F.
- 7.5 GPM flow rate
The top water output for this unit is 7.5 gallons per minute at 120 degrees F, power consumption is between 10300 and 180000 BTU per hour (that is considered low). A single machine of this model is able to support 2/3 fixtures a time. If you intend to use it for industrial, you need to cascade several of them together.
- Easy operating control panel
Error codes and temperature on the screen can be adjusted by you to get the exact water temperature you want with easily operated buttons. Electronic solenoid valves are armed to control gas and water flow.
- Energy efficient
- Quiet working performance
- Outdoor air for safe combustion
- Perform flawlessly
- 82% thermal efficiency
- Self modulate technology to heat water only when you use it
- Energy efficient
- Fluctuations happen for a while
- Venting kits can prove difficult to install
This is one of the few commercial tankless hot water heater for brewery companies.
- Large temperature range
Like the RL75iN series, this industrial temperature of this product ranges between 98 and 160 degrees FG, and the remote controller needs to be purchased separately. A control unit comes with the machine, but you need to hook it up if you want to adjust the temperature with it.
- Endless hot water supply
The highest flow rate of this type is 7.5 gallons per minute, water temperature always stays constant even multiple bathrooms or faucets are using the same time. But the waiting time is quite long.
- Freeze protection
The machine boasts of a freeze protection device, once the outdoor temperature reaches low, the smart unit senses the cold weather and automatically take measures to protect itself. It is also Wi-Fi capable, anywhere you connect the internet, you can control the machine up remotely.
- Installation is easy
- Has a control panel that is easily operated
- Stable water flow and temperature
- 82% thermal efficiency
- Wi-Fi enabled remote control
- Constantly supplies hot water
Working noise is a bit loud
A popular and well-accepted commercial tankless water heater for restaurant available on the market.
- Easy connection
When you use it as a commercial-grade tankless water heater, you can connect multiple ones of the same models together, and the connection process is simple. Additionally, it is both low and high altitude capable.
- Energy efficient
Heat exchangers are built with copper, 82% thermal efficiency gives you more energy. The power range of it is from 11000 to 150000 BTU per hour. It is argued that the unit is able to save 1100 gallons of water each year for you (some customers agree and others do not). The low NOx design makes it more ecofriendly.
- Digital control
The Digital console displays the error codes and temperature, and also maintenance code shows on for reminding. There is no cold sandwich effect with hot water starting program; the machine goes on working for a few minutes after it shuts off.
- Simple to use
- High and low altitude available both
- Energy-efficient and heating cost saver
- Exclusive water-saving settings
- No cold water sandwich
- Suit a good range of power input
Need to be installed by professionals
best commercial electric tankless water heater
- Stable water temperature
The advanced flow control system is used to control frequent water temperature in various flow level, when used industrially, you will need to remain stable and continuous hot water flow by regulating water pressure automatically.
- Full power modulation
This tankless water is armed with a complete power modulation system, able to meet the demand for large power use of commercial needs. It has the power to provide around 5 gallons of water per minute. Plus it shows the best performance where supplied water is less than 45 degrees F.
- 99% energy efficient
The thermal efficiency of this unit reaches as high as 99%, so no usable energy is left to waste. It is constantly used for commercial use because of its reliable cover and high-level electronic parts. The working noise is low, barely heard when working.
- Quality is high
- Design is compact
- No mechanical switches
- Supports complete power modulation
- High quality
- Compact design
- The most technologically advanced electric water heater
Hard to install, needs 240v power and heavy-duty wiring
Still reviewing the best commercial tankless gas water heater for Laundromats.
- Self-diagnostic system
This is armed with a self-diagnostic system and led light that shows off on the console, error codes also display when something wrong happens. Plus, the freeze protection system is installed for preventing the machine from getting frozen.
- Free installation
The heating machine can be both installed for outdoor and indoor and, but it needs to get venting facilities for indoor installation. You are free to install it either horizontally or vertically. If you lack basic knowledge on it, just find someone professional to help you on installing.
- Stable water temperature
Water temperature is not affected by weather and can always stay stable. Temperature ranges from 99 degrees F to 167 degrees F with remote control for commercial use. Power required ranges from 11000 to 190000 BTU per hour.
- Both indoor and outdoor installation
- Has a digital remote control
- Large power
- Internal freeze protection system
- Maximum flow rate reaches up to 8gpm
- Hot water output is not affected by climate
Installing remote control is an extra cost
This is one commercial tankless hot water heater you need to watch out for.
- Ready-Link cascading technology
The ready-link cascading technology allows you to cascade up to 16 units, and it supports common vent up to 8 unites. The maximum flow rate is around 9 gallons per minute, so when you cacade them up, you will be able to use it for commercial use with ease.
- Recirculation pump built-in
This machine is regarded as the most technologically advanced tankless water heater, it has built-in hot recirculation pump and buffer tank, in order to eliminate cold water sandwich and save water bills by shortening the waiting time for hot water, it also reduces the money on buying an extra pump.
- Stable temperature
The machine keeps the water temperature stable; it quickly corrects temperature if it drops suddenly. The external interface shows error codes and temperature so you can easily adjust the temperature you want.
- Intelligent preheating system
- Installation instructions are clear
- Strong enough to be used as a commercial electric tankless water heater for restaurants.
- Satisfying customer service
- Condensing types to save energy
- Fast heating time and short waiting time
- Features a smart preheating system
- When in use, a slightly working noise can be heard
- Lacks a remote, you need to purchase separately
This is a leading industrial tankless water heater in the market of commercial water heaters.
- Large flow rate
Primarily, this is designed to be a commercial tankless water heater for hotels with flow nrate reaching up to 13 gallons per minute, this perfectly meets the demand of large volume of water.
- Brilliant quality level
The heat exchanger is built with commercial-grade copper so its heat and highly corrosion resistance. It is compatible with circulation units, you can also install a circulation pump inside to reduce the waiting time for hot water.
- High energy efficient
- Designed primarily for hotels
- High temperature
- Highly energy efficiency
- Compatible with circulation units
- Excellent material on heat exchanger
- Both propane and natural gas available
Need to be installed by professional
Takagi T-M50 ASME
With the Takagi T-M50 ASME Commercial Natural Gas Tankless Water Heater, you can save more cash on long-term utility bills.
This water heater has an excellent flow rate of 14.5GPM so that you have an excellent consistent flow of water daily. Plus, you enjoy unrestricted supply of hot water, which means your customers and business will never again experience any shortage of hot water.
The T-M50 ASME is mainly designed for heavy-duty applications so that your water needs are effectively met. It is the largest Takagi Tankless heater and the most powerful gas tankless water heater on the market.
With a gas utility of around 380, 000 BTU, the heater can offer enough hot water for 6 bathrooms during hot times. With such heating ability, the T-M50 is perfect for heavy-duty use, which is why it is so commonly used in commercial locations like offices, restaurants, hotels, convalescent houses, and more.
Commercial locales need high demand and durability, which T-M50 offers by being the only unit to provide a double-combustion and heat exchange system for better longevity and reliability. The heat exchangers use HRS35 copper alloy in their design for extra heat resistance and durability over lower-grade copper.
It also boasts of an internal pump control and thicker drum port. The Takagi T-M50 is also great for domestic hot water use with its storage tanks, hydronic heating, amazing floor systems, and reirculation ability.
The heaters are totally modulated, work efficiently and are gas powered. Takagi is NSF rated for commercial applications, and error and diagnostics code display for troubleshooting.
The T-M50 ASME Heavy-Duty Commercial 14.5 GPM Water Heater is one of the best buys that you can find on the market today.
Takagi T-M50 NG
The T-M50 NG offers hot water for both home and commercial systems. It is a sister product of the mighty T-M50 ASME which all belong to the same series and utilize the quintessential storage tanks, as well as the floor, recirculation, and hydronic systems all for the appropriate heating applications.
The T-M50 one of the best commercial tankless gas water heaters on the market with modulating functionality that makes it ideal for commercial purposes. Its gas power of 380,000 BTU allows the T-M50 can deliver a big amount of hot water to supply as many as 6 bathrooms. Its thicker heat exchanger drum and HRS35 heat-resistant copper wire and tubing also make it a better option than low-grade copper models in terms of performance and durability.
The heater’s double heating system offers frequent heating and activity so you need not worry about any issues plus it comes with a simple-Link system for 4 units and Multi-Unit system for ten units.
With a a high flow rate of 14.5 GPM and thermal efficiency of 80.2%, you can be sure to get frequent and continuous hot water flow for days to come. Aside that, you also benefit from high standard safety protocol like overheat, freeze, and surge protection, as well as troubleshooting diagnostic codes.
Takagi also offers a long warranty of up to 15 years on the heat exchanger and as well as one for 5 years for the residual parts to its customers. For a commercially suited water heater, the Takagi T-M50 NG is a great choice.
Stiebel Eltron Tempra 36 Plus – 36 kW – 208/240V AC
When it comes to choosing some of the available commercial electric water heater for restaurants, hotels and more, the Stiebel Eltron Tempra 36 Plus stands out in its features, build and uniqueness. Like all the tankless water heaters in the Tempra Plus series, this heater has earned a lot of positive comments from buyers in terms of its efficiency and performance.
The Tempra 26 Plus is a durable smart water heater that can totally utilize your power source efficiently so you end up saving a lot of cash over time. With its stylish and compact design, users need not worry about getting any extra installation space. You can have the heater under a sink, a small closet or at the back of a furnace with no issues.
The Tempra 36 Plus is the biggest unit in the Tempra Plus series and is provided with 3 heating modules to ensure it is ideal for commercial areas with a large demand for larger homes or hot water. With an energy efficiency of 99%, a water temperature that can rise up to 82 F and water flow greater than 4.0 GPM, you know you’re getting a powerful and strong heater for its size.
It features a minimum of 27 Kilowatts and highest of 36 kilowatts at 208V and 240V power supplies respectively. The heater comes with a digital temperature display for a dial selector adjust and temperature to tilt the water temperature to your preference. With its low energy usage and advanced adjusting and monitoring technology, you can get the ease of use and convenience all at the same time.
You can have your water flow automatically adjusted to a temperature you prefer if the heat capacity is exceeded, which is great in cases where it’s not always great to figure out the water flow. This feature is special to the Tempra Plus series which makes it uniquely outstanding.
Since Stiebel Eltron is such a popular and dependable brand name, you know you can rely on the Tempra 36 Plus’s quality and build when buying the heater. You won’t ever have to go through any cold-water surprises and rest assured that the heater will last you a lifetime.
The Stiebel Eltron Tempra 36 Plus has most accurate temperature control facility from all other similar products out there, so it only makes sense to include it in our list of best commercial tankless water heaters.
Eemax PR011240 Commercial Electric Tankless Water Heater – 11 kW – 240V
The Eemax PRO11240 is a lightweight heater built with a low bulk in its body and manages to promise longetivity and durability. The heater also has great insulation, but in comparison to other tankless water heaters, it’s cheaper and slightly less efficient.
That being said, the heater manages to carry out an effective job at providing a continuous supply of hot water for heavy duty commercial use. This is important because of the construction and build of the brass heat exchanger, which compromises for the low water flow rate by providing consistent and steady hot water without worrying about burns or running out of cold water.
It does take some time to heat up, but you get to enjoy continuous water as soon as it’s done. Clients can avoid scalding accidents with the added LED displays and temperature control knob that easily adjusts temperature to the desired level for total control.
The Eemax PE011240 can be installed as a separate unit on showers as well with its mounting ability so that a hot shower isn’t just wish anymore. The heater is greatly designed to keep all the parts intact to provide complete performance.
Repairs aren’t going to be an issue, but if a situation arises, you’ll need professional help to get it fixed. The great thing about the heater is that you can claim warranty from Eemax and other sellers as well, but that is a far-off situation considering its components are designed with good build and quality, so you don’t have to worry about that.
With its compact design and lightweight, low power consumption, LED display and simple knob adjustment, you can be sure this is a great sensible choice for any commercial business owner.
AO Smith ATO-510-N
If you are tinkering around for an ideal tankless water heater that perfectly works for commercial and heavy residential appliance, this tankless heater won’t disappoint you.
It features an excellent flow rate of 10.0 GPM with the highest power consumption being 199,000 BTUs of natural gas which makes quintessential among other available options. Now, an endless supply of hot water doesn’t require you to spend huge amounts of dollars on energy consumption bills as the ATO-510-N is designed for efficiency. It is equipped with Tauscher copper heat technology that consumes 40% lesser energy than the conventional tank. Need I add that it saves the maintenance cost. Electronic ignition keeps this device from using constant power consumption. It’s terrific features and performance are worth counting on.
It only gets better…
The manufacturer also assured that their product is safe to use. The anti-freezing technology ensure it is as efficient in colder climates as in hotter weather periods. It keeps the tubes from freezing and lets you enjoy the performance without any form of damages.
On the other hand, it comes with the capacity to deal with too much pressure with its overheat protection fuse. Also, it has the capacity to deal with excess pressure with its overheat protection fuse.
Aside all of that, it uses and sets up the extra convenient and provide both outlet and inlet thermistors that allows you to keep a check on the water temperature. Along with a long list of amazing features, it also offers Heat-Exchanger and parts warranty for 5 years.
So, this is the right choice if you’re fishing for efficient best commercial tankless water heater for your home or business. Now, you can enjoy trouble-free years of running hot water.
AO Smith ATI-540H-N
The ATI-540H-N is everything you might want and features a temperature range from 100° F-185° F. So, it keeps you safe from the trouble of adjusting the switches to higher temperatures.
Additionally, its weight and tiny size ensures simple installation and this feature is quite rare in the product competitors are offering. When talking about capacity, it beats many others.
It ensures there is an endless supply of hot water for 3 baths. So, it is perfect for larger homes or commercial buildings. It can be extended to 4 baths if the weather is not very cold. You need not worry about energy consumption as it uses only natural gas and utilizes 199,000 BTU. Besides its outclassed condensing system, it has one of the highest energy factors i.e. 0.95. This unit is reliable in terms of performance which is unbeatable.
Not to forget the 15 years of limited warranty, the manufacturer is focused on providing you with the best commercial tankless water heater in the market. This AO Smith is built with HR35 cooper as a major heat exchangers which means a high-grade copper that ensures efficient performance all the time. Also, the
Also, the company included 316L stainless steel as a secondary heat exchanger. Enjoy high standards of efficiency and save money at the same time. Another plus point of this ATI-540H-N heater is that you wouldn’t have to replace it if you intend to transform your residence into a commercial area as it is made for commercial applications as well.
Plus, it wouldn’t fail to provide protection against corrosion. Continuing to the safety features, it is equipped with freeze protection; an inbuilt flame sensor and overheat protection fuse. Temperature control with inlet and outlet transmitter also falls in the list of features. And yes, installation space is not an issue if you decide to pick this amazing unit.
Noritz NCC1991-ODNG is the option that offers innovation and high tech you might want to consider getting it delivers complete power consumption and condensation falls between the ranges of 16,000 BTUh to 199,900 BTUh. Noritz is known for its high-quality features that won’t put money spent to go waste. The main heat exchanger is built with high-grade copper and the piping is 25% thicker than other models.
On the other hand, the secondary heat exchanger is manufactured with stainless steel that makes it possible to transfer heat in an efficient manner. The casing is also made of durable stainless steel.
Now, it is armed with the capability of a multipurpose system where you can link the units. You can either use a System Controller that is multi-unit for up to 24 units or an optional two-unit Quick Connect. It works best for you if you want a heater to be environment-friendly as it curtails the carbon dioxide output.
The primary sources of energy consumption are natural gas and propane that make it 94% efficient for use. The product includes a remote thermostat that saves you from the pain of adjusting temperatures. It regulates the output temperature from 100°F to 185°F. Direct electronic ignition is one of the features too that needs only 120 volts to work. So, it is safe to say that this is one of the best commercial tankless propane water heaters available.
The package also includes a remote controller cord and a power cord. Its Quick Connect setup allows you to connect to the secondary unit easily. As far as safety is concerned, The Noritz NCC1991 makes sure you don’t end up paying extra money for any damages.
This excellent tankless heater comes with flame sensors, neutralizer refill, freeze protection, overheat prevention device, and lightning protection device. To be honest, No heater could be safer than this. This heating device doesn’t come without warranty and you will enjoy a 5 years of limited heat exchanger warranty. Not only this, it also offers 5 years limited parts warranty. This product is no less than perfect for your money.
SuperGreen IR4000 Infrared Electric Tankless Water Heater
Now this IR4000 is something unique. As the name implies, the SuperGreen has created what they named the world’s only infrared hot water system. The IR4000 does not have a heating element or coil, but instead uses high-power quartz heating elements that are eco-friendly.
The biggest advantage here is that, your water will have no direct contact with any heating elements incide the unit, so this increases the unit’s lifespan. As an added benefit, the 4 redundant far-infrared heating elements also have a self-cleaning design for maintenance-free operation.
That is a big difference from most commercial tankless hot water heaters that need vinegar flush or cleaning every six months to a year.
It is commercial grade and you can expect a maximum of 2.2 GPM with the IR400. For warm climates, the SuperGreen IR4000 can heat water for one shower and a sink at the same time. This one-of-a-kind electric tankless water heater is also very efficient, operating at 99% thermal efficiency. You can also be thankful for zero NOx emissions, guaranteed. To install, you will have about 25 pounds to mount, and the IR4000 runs about 14 inches wide by 20 inches high by 6 inches deep.
Some of the nitty details: it consumes a maximum of 9 kilowatts of power, and runs on a 220-volt service. The outlet and inlet pipe fittings are ¾ inch. You must have a minimum household electrical service of 125 amps to run the IR4000. You need a 40-amp double-pole breaker and will need to run #8 wires. You can use this system for everything from a hybrid setup to extend the life of your tank, to a solar heat backup, radiant heating, or hydronic heating.
Customer service are readily available to help you out and are based here, the United States of America. As far as price goes, you won’t find a cheaper unit on our commercial list.
Bosch C 1210 ESC NG Natural Gas Indoor Commercial Condensing Tankless Water Heater
The C 1210 ESC is the highest-end fully condensing gas tankless water heater from Bosch. This high-performance heater is best for commercial use, as it throws 225,000 BTU and can reach temperatures of 180°F—so it would work well for commercial spas or salons, restaurants, laundry applications, or other washing stations with high hot water needs. It offers an impressive 12.1 GPM flow rate at a 35°F temperature rise, and even at at 55°F rise, it still gives a flow rate of 7.7 GPM.
By utilizing the exhaust gas heat and using it to preheat the incoming cold water, the condensing C 1210 ESC offers you increased thermal efficiency at 98% and reduced emissions—easily eclipsing the 2012 Low-NOx emissions standards set by SCAQMD (South Coast Air Quality Management District).
While you will find the C 1210 ESC at the high end of the price range, the flow rate and the fact that it is the only ASME-certified condensing version on the market today mean it’s worth it. This heater boast of an electronic ignition system and can vent with three or four-inch PVC, ABS, CPVC, or category III stainless steel, either through the side wall or up through the roof, at a maximum distance of 63 feet. This Bosch product is a concentric venting option. Gas connections are ¾-inch lines.
Since this unit is designed for either outdoor or indoor installation, the C 1210 ESC comes with built-in freeze protection and an externally accessible water filter. But, it does not come with a pressure relief valve.
How to Choose Commercial Tankless Water Heater?
The industrial tankless water heater is normally used for hotel, large homes, brewery, Laundromats etc. and a large volume of hot water is required and you need to get many cascaded up together. On picking a commercial tankless hot water heater, there are some tips:
The quality level of commercial tankless hot water heater determines its safety and service life. There is a certain standard on heating exchangers and other internal MATERIALS. So, selecting a high-quality one is able to save a huge amount of money in repairing and maintenance.
The flow rate of commercial tankless water heaters need not be large enough, or it is unable to provide a satisfying experience. The average flow rate of each is around 9 gallons per minute, of course, you can also cascade multiple small flow rate one based on your actual needs.
The power of hot machines determines water flow, if it is not powerful enough, hot water will not flow without disturbances. So, selecting a powerful one can do amazing things.
Because the power rate of commercial units are quite large, they are really pretty expensive in using. So, purchase the ones designed to be high energy efficient, so you save more money per month.
Because of its special applications, commercial tankless water heater temperature range is normally higher than residential type. It ranges from 98 degrees F to 185 degrees F, while maximum temperature reaches up to 140 degrees F.
best commercial tankless water heater
Features of Commercial Tankless Water Heater
Tankless water heater types save you time that could have otherwise been spent waiting. Because of this, you can limitless hot water instantly.
There is no need to wait for preheating and warming of water, no heating loss in whole using process.
Unlike a tank water heater, it is designed to small and compact in size, suitable to be installed anywhere you want. Even for a small studio, you can also install a large flow commercial type.
To maximize safety, many of the large power tankless water heaters are designed with overpressure and overheating protection system to protect the machine in danger.
It is installed directly in the bathroom, there is no need to break the wall, and multiple buttons are set to adjust the water temperature.
Because of the large demand for power and hot water, one commercial tankless water heater is generally not powerful enough to meet the need in hospitals or large hotels. So, you need to cascade many of them together. If you lack enough knowledge on it, kindly ask the manufacturer first and then get a professional to help you.
What We Pick Is…
We would love to recommend t you the Rinnai RUC98iN Ultra Series Tankless Water Heater as the best commercial tankless water heater for hotels, restaurants, brewery and Laundromats. The maximum temperature for commercial use is up to 185 degrees F, thus is able to provide flawlessly hot water for you.
It comes equipped with a large flow rate and 0.95 high thermal efficiencies, the powerful performance makes it the perfect one for commercial use. Heating time is very quick and helps save much hearing and water costs.
If you have an interest in the item or more top commercial tankless water heater reviews, please feel free to get more information and price details on Amazon, there will always be a large discount on Amazon to save a large sum of money for you.