Best Residential Tankless Water Heater (2024 Update)
If you're looking for a reliable and efficient water heating system for your home, a residential tankless water heater might be the solution you need. Unlike traditional tank water heaters that store hot water, tankless heaters only heat water on demand, providing you with hot water on tap whenever you need it. With many options in the market, finding the best residential tankless water heater requires some factors consideration.
When buying a residential tankless water heater, it is important to consider your household's size, hot water usage, and climate conditions. A larger household requires a heater that can produce more hot water at a faster rate. Similarly, in cold climates, you'll need a higher heating capacity to compensate for the colder incoming water. The installation space and the energy source used by the heater, gas or electricity, are also important considerations for your purchase.
Are you tired of running out of hot water in the middle of a shower? Would you like to save on energy bills and reduce your carbon footprint? If so, keep reading to find out what to consider when choosing the best residential tankless water heater for your home. We've done the research and gathered all the essential information you need to make an informed purchase decision. Our guide breaks down the technical features, reviews, and best-practice recommendations, so you can find the perfect match for your home's hot water needs.
10 Best Residential Tankless Water Heater
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The product is ideal for providing hot water in residential spaces with access to natural gas.
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Ideal for providing hot water for residential purposes with high efficiency and energy-saving capabilities.
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Ideal for providing hot water indoors at a high flow rate and BTU output using propane gas as a fuel source.
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Ideal for residential use, providing hot water to multiple points of use using liquid propane gas with high efficiency and CSA certification.
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Ideal for providing continuous hot water in residential and light commercial settings while saving energy and space.
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Ideal for providing instant hot water for whole homes, indoor use, and powered by propane.
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The product is ideal for providing hot water in both commercial and residential settings through electric heating technology.
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It is ideal for remotely controlling tankless gas water heaters in residential settings.
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It is ideal for residential use as a high-efficiency, space-saving, and on-demand hot water solution.
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This product is ideal for residential and commercial use as an ultra-low NOx indoor tankless water heater with high BTU input.
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1. Thermalux Energy-Star Tankless Water Heater
The THERMALUX tankless water heaters have been designed to provide highly efficient and energy-saving solutions for homeowners. With an ENERGY STAR qualification, these units use up to 40% less energy than traditional storage water heaters.
Flow rates for the THERMALUX tankless water heaters range from 0.5 GPM to 11.1 GPM. The unit can provide up to 11.1 GPM at a 30 degree temperature rise, delivering reliable hot water whenever needed.
THERMALUX takes pride in offering homeowners a tankless unit with 93% thermal efficiency, ensuring that the unit maximizes energy usage and reduces waste. This high efficiency rating ensures that homeowners can enjoy substantial savings on their energy bills while contributing to a cleaner environment.
Additionally, THERMALUX provides a 12-year warranty on the heat exchanger, and a 5-year warranty on service parts, giving customers peace of mind and confidence in their purchase.
With its impressive efficiency rating, reliable hot water delivery, and extended warranty, the THERMALUX tankless water heater is an excellent choice for homeowners looking to upgrade their water heating system.
2. Instagas Comfort Propane Tankless Water Heater
When it comes to installing tankless water heaters, it's important to follow the local building and plumbing codes of the installation location. Therefore, it's recommended that a licensed professional handle the installation process.
One of the benefits of this tankless water heater is its ability to provide instant hot water without the need for a 30-minute preheating period. With a high heating capacity of 145,000 BTU and a maximum flow rate of 6.3 GPM, this unit is suitable for 2-3 outlet points, making it ideal for families. Additionally, its UEF of over 0.81 ensures a high energy conversion rate, reducing energy loss.
Rest assured, this product is CSA certified in both the United States and Canada, ensuring its excellent quality. It uses the world's most advanced technology, providing superior safety and durability. The built-in forced exhaust fan at the bottom of the unit ensures stable combustion and eliminates the influence of any external wind.
The compact design makes for easy installation, and FOGATTI provides a 30-day free replacement policy, as well as a 5-year warranty on the heat exchanger and a 2-year warranty on other parts. It's important to note that any labor costs beyond the first 30 days are not covered by the warranty.
3. Marey Propane Tankless Water Heater – Csa Certified!
This product boasts an impressive array of certifications and features that make it stand out from the crowd. Firstly, it is CSA certified, which means that it has been rigorously tested and meets the highest safety standards. The LED touch screen adds a modern touch and allows for easy operation. The computerized safety feature ensures that the product operates smoothly and efficiently.
One of the standout features of this product is the flow activation system. This allows for instant hot water as soon as the tap is turned on, eliminating the need to wait for the water to heat up. The oxygen free copper heat exchanger ensures that the water is heated quickly and efficiently, while also preventing corrosion.
The stainless steel venting exhaust is not only durable and long-lasting, but also ensures that the product operates quietly. The anti-freeze protection feature ensures that the product remains in top condition even in colder temperatures.
This product has also been UL listed, which is a mark of quality and safety. Finally, the DOE certification ensures that the product meets the energy efficiency guidelines set by the Department of Energy.
4. Ao Smith Ati-540h-N Condensing Residential/light Commercial Tankless Heater
The Air-Fuel Ratio (AFR) sensor is a crucial component in any combustion system. It measures the ratio of air to fuel in the mixture, and ensures that the engine is running at peak performance. With this sensor, you can be confident that your engine is running efficiently and safely.
This product also features exhaust and water temperature safety control, which helps to protect your engine from damage due to overheating. By monitoring the temperature of these important components, the safety control system can take action to prevent damage and keep your engine running smoothly.
In addition to these safety features, the product also includes an overheat cutoff fuse. This important feature provides an extra layer of protection against overheating, and can help to prevent catastrophic damage to your engine.
The 4" pipe vents included with this product are capable of venting up to 50 equivalent feet, while the 3" pipe vents can vent up to 25 equivalent feet. These vents are designed to improve the efficiency of your combustion system, and to help ensure that your engine is running at peak performance.
5. Camplux Gray Hot Water Heater – Instant, Propane-Powered
The Camplux tankless water heater is a reliable and efficient option for anyone seeking an instant hot water solution for their home. With a flow rate of 6.86 gallons per minute, this heater is perfect for providing hot showers to the entire household.
Installation of this water heater is a breeze, as it is activated by water flow rather than water pressure. It automatically activates at a pressure between 7.0-150 PSI, with a minimum activation rate of 0.65 GPM. The maximum input rating for this heater is 180,000 BTUs, and the water connection location and size are located at the bottom with a 0.75-inch NPT connection.
The Camplux water heater is equipped with a direct-current frequency conversion fan, which can resist level 8 strong wind resistance. This feature makes it suitable for use in high-rise buildings, as it maintains consistent water pressure and temperature even on higher floors.
The S/S burner of the tankless gas water heater is CSA certified and designed for balanced combustion, ensuring high heating efficiency up to 89.98%. The PCB frequency conversion and temperature intelligent control make this heater environmentally friendly and durable. The heater also features a user-friendly man-machine dialogue, so you can enjoy heating without waiting.
Safety is a top priority with the Camplux tankless water heater, which is why it comes with anti-scalding protection. This feature helps prevent excessively high setting temperatures that can cause burns, particularly in children. The heater automatically sets a temperature limit of 122 ℉, and the water valve needs to be closed to make the water heater enter standby mode before setting the temperature above 122 ℉.
6. 208vac, Commercial/residential Electric Tankless Water Heater, 6240 W
The Electric Tankless Water Heater is an excellent choice for both residential and commercial use. This unit boasts a compact size and easy installation, making it an ideal option for those who are looking for an efficient and cost-effective water heating solution.
With a water connection of 3/8" compression and horizontal mounting, this tankless heater includes compression fittings and faucet flow controls for added convenience. It meets standards for UL, IAMPO, HUD, and ADA and has a height of 6-1/4", a width of 9-5/8", and a depth of 2-3/4".
The Electric Tankless Water Heater has a water heater design of point-of-use and is capable of handling a pressure range of 25 to 150 psi. It has a factory preset temperature and is 99% energy efficient, providing unlimited hot water. The temperature range is 110 degrees F and the unit has a minimum flow activation of 0.40 gpm.
This tankless water heater has a temp. rise of 28 degrees F at 1.5 GPM and a temp. rise of 17 degrees F at 2.5 GPM. It requires a minimum wire size of 10 AWG, has a voltage of 208VAC, and an amp rating of 30. The temp. rise at 20.0 GPM is 30A.
The Electric Tankless Water Heater is manufactured in the United States and has no shortage of excellent features. It is an energy-efficient solution that provides unlimited hot water and is easy to install. With its compact size and low installation cost, it is an excellent option for those looking for a cost-effective and efficient water heating solution.
7. Rtg20006dw Umc-117 Wired Main Remote Control For Residential Tankless Gas Water Heaters
When it comes to selecting the right control for your water heater, it's important to always search using the serial number to ensure compatibility. That's where the Supplying Demand remote control for tankless systems comes in. With the ability to connect up to three remotes, you can have precise temperature control in 2° increments, with a maximum of 140°.
It's worth noting that while this digital display system remote is water resistant, it is not fully waterproof. As with all water heater parts and accessories, installation should only be done by qualified technicians.
The Supplying Demand replacement parts are designed to be compatible with major brands, but it's always important to verify fitment with your specific application. Additionally, all SD products come in Supplying Demand packaging, ensuring that you're receiving a high-quality product that's backed by a trusted brand.
8. Rheem 240v 3 Heating Chambers Rtex-27 Residential Tankless Water Heater, Gray
The external digital thermostatic control with LED display is the perfect solution for those who want to have precise control over their hot water temperature. With an impressive accuracy of +/1 degree, this control ensures that you have the ideal temperature every time you turn on the faucet.
One of the most advanced features of this control is its self-modulation capability. It adjusts the power consumption according to the hot water demand, ensuring that you get hot water when you need it, without any wastage. This not only saves you money on your energy bills but also reduces your carbon footprint.
The three heating elements are made of durable copper, ensuring longevity and reliability. In case of any issues, the heating elements are field serviceable, making it easy to maintain the unit and prevent any downtime.
Installation is a breeze, thanks to the bottom 3/4 inch NPT water connections. The unit is threaded for easy replacement, which makes it easy to switch out if needed. The digital temperature display is clear and easy to read, allowing you to monitor the temperature at a glance.
Best Residential Tankless Water Heater FAQs
Are there any energy-efficient residential tankless water heaters available?
Yes, there are several energy-efficient residential tankless water heaters available in the market. Tankless water heaters are known for their energy efficiency as they only heat water when it is needed, making them more efficient than traditional water heaters that continuously heat and store water in a tank.
Some of the most energy-efficient tankless water heaters available for residential use are:
1. Rinnai RUR199iN Super High-Efficiency Plus condensing tankless water heater.
2. Navien NPE-240S-A tankless gas water heater.
3. Rheem RTGH-95DVLN tankless water heater.
4. Noritz NRC661-DV-NG tankless water heater.
These tankless water heaters use advanced technology to reduce energy consumption, minimize heat loss, and provide hot water on-demand. They are designed to be efficient, durable, and easy to install. If you are looking for an energy-efficient tankless water heater for your home, it is recommended to consult a professional plumber or HVAC specialist to help you choose the right model for your needs.
Are there any safety concerns associated with installing a residential tankless water heater?
Like any other appliance, residential tankless water heaters also come with safety concerns. However, if installed correctly and maintained properly, tankless water heaters can be a safe and efficient option for homeowners.
One of the main safety concerns associated with tankless water heaters is the risk of fire. Tankless water heaters use high-powered burners to heat the water, and if not installed correctly or maintained properly, there is a risk of a fire hazard. It is important to have a licensed professional install the unit and ensure that it is properly ventilated and free from any combustible materials.
Another safety concern is the risk of scalding. Tankless water heaters can produce hot water at a much higher temperature than traditional tank-style heaters, so it is important to set the temperature to a safe level and install anti-scald devices to prevent accidental burns.
Lastly, gas-powered tankless water heaters also have the risk of carbon monoxide leaks. It is important to have carbon monoxide detectors installed in your home and have your tankless water heater serviced regularly to prevent any potential dangers.
Overall, with proper installation and maintenance, tankless water heaters can be a safe and efficient option for homeowners.
Can a residential tankless water heater provide hot water for multiple fixtures at the same time?
Yes, a residential tankless water heater can provide hot water for multiple fixtures at the same time. The capacity of a tankless water heater is determined by its flow rate, which is measured in gallons per minute (GPM). The flow rate required for simultaneous use of multiple fixtures depends on their individual GPM requirements. For example, a shower typically requires 2-2.5 GPM, while a dishwasher or washing machine may require 1.5-2.5 GPM.
When selecting a tankless water heater, it is important to consider the peak hot water demand of the household. This can be determined by adding up the GPM requirements of all fixtures that may be used simultaneously. It is recommended to choose a tankless water heater with a flow rate that exceeds the peak demand to ensure consistent hot water supply.
It is also important to note that the temperature rise of the incoming water affects the flow rate of the tankless water heater. The colder the incoming water, the lower the flow rate. Therefore, in colder climates, a higher-capacity tankless water heater may be required to meet the household's hot water needs.
How do I determine the appropriate size of a residential tankless water heater for my household?
To determine the appropriate size of a residential tankless water heater for your household, you need to consider the following factors:
1. Flow rate: Determine the maximum hot water flow rate required by your household. You can calculate this by adding up the flow rates of all the fixtures that are used simultaneously.
2. Temperature rise: Calculate the temperature rise required to heat the incoming water to the desired temperature. This is the difference between the incoming cold water temperature and the desired hot water temperature.
3. Climate: Consider the climate in your area as colder climates require higher temperature rise and larger units.
4. Number of people: Consider the number of people living in your household as larger households will require a larger unit.
5. Usage patterns: Consider the usage patterns of your household. If you have a high demand for hot water, you may need a larger unit.
Once you have determined these factors, you can use the sizing chart provided by the manufacturer to select the appropriate size of the tankless water heater for your household. It is always better to choose a slightly larger unit to ensure sufficient hot water supply for your household.
How do I properly maintain a residential tankless water heater to ensure longevity?
To properly maintain a residential tankless water heater, there are a few steps you can take to ensure longevity and efficiency. First, it is important to regularly flush the system to remove any buildup of mineral deposits. This can be done by following the manufacturer's instructions or hiring a professional plumber to perform a flush.
Next, check the air intake and exhaust vents regularly to make sure they are free of debris and obstruction. This will help prevent any damage to the internal components of the unit.
It is also important to monitor the water pressure and temperature regularly to ensure the unit is operating correctly. If you notice any fluctuations or irregularities, it may be time to call a professional to inspect the unit.
Finally, make sure to schedule regular maintenance with a licensed professional to ensure the unit is functioning at its highest capacity and to catch any potential issues before they become major problems. By following these steps, you can help prolong the life of your tankless water heater and prevent any costly repairs or replacements.
How much does a high-quality residential tankless water heater cost?
The cost of a high-quality residential tankless water heater can vary depending on several factors. Generally, the price of a tankless water heater ranges from $500 to $2,500 or more depending on the brand, model, and features. Premium brands such as Rinnai, Navien, and Noritz are more expensive than other brands, but they also come with advanced features and longer warranties. The cost of installation can also affect the overall price, as it requires a professional plumber to install the unit properly. Additionally, the type of fuel used (electric or gas) can also impact the price of the unit and installation. While a tankless water heater may have a higher upfront cost compared to a traditional tank water heater, it is energy-efficient and can save homeowners money in the long run by reducing energy bills. It is recommended to do research and compare prices and features of different brands before making a purchase to ensure you get the best value for your money.
What are the advantages of using a residential tankless water heater over a traditional water heater?
Tankless water heaters have gained popularity in recent years because of the many advantages they offer over traditional water heaters. Here are some of the advantages of using a residential tankless water heater:
1. Energy Efficiency: Tankless water heaters are more energy-efficient than traditional water heaters. They only heat water when it's needed, which means they don't waste energy heating water that isn't being used.
2. Space-saving: Tankless water heaters are compact and take up less space than traditional water heaters. This makes them ideal for small homes or apartments.
3. Longevity: Tankless water heaters have a longer lifespan than traditional water heaters. They can last up to 20 years, compared to 10-15 years for traditional water heaters.
4. Continuous Hot Water: Tankless water heaters provide hot water on demand, so you never run out of hot water, unlike traditional water heaters that store a limited amount of hot water in a tank.
5. Cost Savings: Although tankless water heaters have a higher upfront cost, they are more cost-effective in the long run. They save money on energy bills and require less maintenance than traditional water heaters.
Overall, a residential tankless water heater offers many advantages over a traditional water heater, making it a smart investment for homeowners who want to save money and energy while enjoying continuous hot water.
What are the top-rated residential tankless water heaters on the market?
There are several top-rated residential tankless water heaters on the market, and the best one for you will depend on your specific needs and budget. One of the most popular options is the Rheem Performance Platinum 9.5 GPM Natural Gas High-Efficiency Indoor Tankless Water Heater, which is known for its reliable performance and energy efficiency. Another great option is the Takagi T-KJr2-IN-NG Indoor Tankless Water Heater, which is compact and can provide hot water for multiple applications simultaneously. The Rinnai RUC98iN Ultra Series Natural Gas Tankless Water Heater is another highly rated option that boasts a high flow rate and energy savings. Other top-rated tankless water heaters include the Navien NPE-240-A Tankless Gas Water Heater, the EcoSmart ECO 27 Electric Tankless Water Heater, and the Stiebel Eltron Tempra Plus 24 kW Tankless Electric Water Heater. It's important to do your research and consult with a professional to determine which option is best for your home.
What features should I look for in a reliable residential tankless water heater?
When looking for a reliable residential tankless water heater, there are several features that should be considered. Firstly, the size of the unit should be appropriate for the size of your home and the number of occupants. A unit that is too small will be unable to meet your hot water demands, whereas a unit that is too large will result in unnecessary energy consumption.
Next, consider the energy efficiency of the unit. Look for a model with a high energy efficiency rating, such as Energy Star certification, which will help to lower your energy bills and reduce your carbon footprint.
In addition, consider the flow rate of the unit. The flow rate is the amount of hot water the unit can produce at a given time. You should choose a unit with a flow rate that can meet your hot water needs, especially during peak usage times.
Lastly, consider the maintenance requirements and the warranty offered by the manufacturer. Look for a unit that requires minimal maintenance and has a reliable warranty, so that you can have peace of mind knowing that your investment is protected.
What is the lifespan of a typical residential tankless water heater?
The lifespan of a typical residential tankless water heater can vary depending on the manufacturer, usage, maintenance, and water quality. On average, a tankless water heater can last between 10 to 15 years. However, with proper maintenance and care, it is possible for a tankless water heater to last up to 20 years or more.
Regular maintenance is essential to ensure the longevity of a tankless water heater. This includes flushing the unit annually to remove any mineral buildup, checking for leaks or damage, and replacing any faulty or worn-out parts. It is also important to use the appropriate water filter or softener to prevent mineral buildup and corrosion.
Factors that may affect the lifespan of a tankless water heater include the frequency of use, the quality of installation, and the level of demand placed on the unit. It is important to consult with a professional plumber or technician to determine the best type of tankless water heater for your household needs and to ensure proper installation for optimal performance and longevity.
