- External digital thermostatic control with LED display (+/1 degree accuracy)
- Most advanced self-modulation, adjust power to meet hot water demand
- Durable Copper immersion two heating elements, field Serviceable. Flow Rate- up to 4.4 GPM
- Simple installation – bottom 3/4 inch NPT water connections
- Threaded for easy replacement, simple installation, digital temperature display
- Endless On-Demand Hot Water; Consistent hot water when you need it that never runs out; Continuously monitored water temperature and controlled flow rates ensure efficiency and consistent performance within 1 degree of selected temperature.Amperage Draw : 54 A.Special Features: Energy Efficient
- Save Space; EcoSmart tankless electric water heaters are 90% smaller than traditional tank heaters; may be installed on wall or at point of use; Dimensions 11.5 x 8 x 3.75 inches
- Save Energy; EcoSmart tankless electric water heaters are 99% thermal energy efficient; Only heats water when called unlike a tank heater that maintains water temperature even when not being used.
- EcoSmart ECO 11 Sizing; 13-kilowatt tankless electric water heater ideal for providing hot water for a bathroom, small sink, office breakroom and other point-of-use or low-flow applications; provides between 1.3 and 3.1 gallons-per-minute depending on the inlet water temperature; refer to the sizing guide to select the proper solution
- Note: Things to know before buying, Our Orbek tankless water heater electric 14kw requires a 240V/60AMP two-pole breaker, 1 set of 6 AWG wires and 1/2" NPT water connections. Please ensure that the total current of the household circuit breaker panel is greater than or equal to 150 amps. Otherwise, it may affect the normal operation of the equipment. Especially if other high-power appliances are also being used in the household circuit.
- Instant Hot Water Supply: Orbek electric tankless water heater 240v can provides up to 3.38 GPM of on demand endless hot water and ensure comfortable hot water for 2-3 points of use simultaneously
- High Energy Efficiency: This on demand hot water heater electric utilizes water-electricity separation to minimize scale and corrosion. It provides endless hot water in just 3 seconds with an impressive efficiency, potentially reducing electricity costs by up to 60% compared to traditional tank-style heaters
- Comprehensve Security Protection: The tankless hot water heater is ETL certified and packed with advanced safety features, including leakage protection, over-temperature protection, dry-heating protection and lighting resistance etc. Each product undergoes rigorous testing before leaving the factory to ensure its safety and normal operation
- Stable Temperature Control: The built-in chip adjusts heating power 20,000 times per second, keeping water temperature stable within 1°F for a comfortable shower experience
- ELECTRICAL REQUIREMENTS: 3 x 40 AMP Double Pole Breakers Required. 200 AMP Household service recommended. Ensure your home can accomodate the power supply and that enough space is available in your breaker panel for this unit. RTEX-24 model is 100A, 24kw, 240V.
- PROVEN PERFORMANCE: Continuous hot water when you need it for the whole home (review performance guide image to confirm this water heater will provide the hot water needed based on geographic location). Ground water temperature impacts temperature rise and gallons per minute.
- EASILY ADJUSTABLE: ON/OFF Dial Control with adjustable digital temperature display allows for adjustments in 1-degree increments from 80-140 degrees F.
- EFFICIENT: Tankless electric water heaters save space, energy, money, and require no venting.
- CONVENIENT HOT WATER HEATER: 2.5 gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it. Thermal efficiency is 98%. Dimensions : 13.75 W x 13.75 H x 10.75 D Inches
- LONG LASTING QUALITY: This electric water heater is easy to maintain and has premium glass-lined material for a long service life. (Amps 12A, Volts (VAC) 120)
- INDEPENDENT INSTALLATION: 36-37" cord plugs into a 120 volt outlet for independent installation or in-line with a large hot water source
- FAST RECOVERY RATE: Eliminates long waits for hot water at your sink, get on demand hot water at your every need (supplies up to 2 sinks at a time)
- EASILY MOUNTED: Can be shelf, wall or floor mounted (bracket included); simply tap into the cold water line and install the water heater directly at the sink to provide hot water
- One Model, Anywhere: This Rinnai tankless water heater is installable indoors or outdoors thanks to our new Versa Vent and powered by either propane or natural gas thanks to a Smart Sense gas control system; RX-OVC vent cap required for outdoor install
- Never Run Out of Hot Water with this Compact Tankless Gas Water Heater: This condensing propane and natural gas tankless water heater from Rinnai is only the size of a small suitcase, but provides up to 11.1 GPM (7 fixtures at once)
- Smart, Efficient Design: This water heater's modern design includes an easy-to-use interface, Quick Flush feature for simplified flushing, as well as a super-high energy efficiency factor of UEF .98; See Controlr module for WiFi control (not included)
- Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to find a qualified technician to install your tankless water heater, and use the Rinnai Central App for help with setup, service & troubleshooting; We do not recommend installing a water heater without a technician
- Find Your Rinnai: See our product guides, manuals, energy guide, warranty information, videos, and tables to find the right tankless water heater size for your home; Check our Ground Water Temperature Map to see if this heater is optimal for your region
- ON/OFF Dial Control with adjustable digital temperature display
- Self-modulating power control
- 11kW Model Flow Rate: up to 2.68 GPM
- Side 1/2" NPT water connections
- On demand, consistent and continuous hot water
- Note: Things to know before buying, Our Orbek tankless water heater electric 18kw requires 2 x 240V/40A two-pole breakers, 2 sets of 8 AWG wires and 3/4" NPT water connections.Please ensure that the total current of the household circuit breaker panel is greater than or equal to 150 amps. Otherwise, it may affect the normal operation of the equipment. Especially if other high-power appliances are also being used in the household circuit.
- Instant Hot Water Supply: Orbek electric tankless water heater 240v can provides up to 4.17 GPM of on demand endless hot water and ensure comfortable hot water for 2-3 points of use simultaneously
- High Energy Efficiency: This on demand hot water heater electric utilizes water-electricity separation to minimize scale and corrosion. It provides endless hot water in just 3 seconds with an impressive efficiency, potentially reducing electricity costs by up to 60% compared to traditional tank-style heaters
- Comprehensve Security Protection: The tankless hot water heater is ETL certified and packed with advanced safety features, including leakage protection, over-temperature protection, dry-heating protection and lighting resistance etc. Each product undergoes rigorous testing before leaving the factory to ensure its safety and normal operation
- Stable Temperature Control: The built-in chip adjusts heating power 20,000 times per second, keeping water temperature stable within 1°F for a comfortable shower experience
- ✔ ELECTRIC TANKLESS WATER HEATER - This tankless electric water heater is made of high-quality ABS material, with LED display. With 3000W power, the mini water heater can raise the water by 82° F(0.3GPM) -131° F(0.5GPM) in seconds, providing tankless instant, continuous hot water without waiting for preheating, meeting daily hot water needs. The on demand water heater can set Fahrenheit or Celsius degrees by holding a power button for 6 seconds.
- ✔ COMPACT AND EFFICIENT DESIGN - The electric water heater tankless adopts an ultra-thin and smooth appearance design, which is beautiful and elegant. The point of use water heater can meet your outlet temperature requirement. The Larger the water flow, the lower the outlet temperature; The smaller the water flow, the higher the outlet temperature. Not Suitable for Shower(Shower normally requires at least 1.8 GPM). Under sink water heater 110v plug in.
- ✔ SAFETY INTELLIGENCE RELIABLE - This under sink hot water heater has multiple protection functions. Water and electricity isolation, IPX4 waterproof, leakage protection, dry boil protection, and automatic power off under overheating and inactivity. Prevent leakage and water pipe corrosion. The thermal efficiency of instant hot water heater is as high as 98%, allowing you to enjoy hot water at any time and save energy.
- ✔ EASY TO INSTALL AND APPLICATION - Our instant hot water heater under sink compact design, it is very suitable for every corner of your home. This 110 volt water heater comes with premade fixing screw holes, an English manual, and 1/2 inch NPT standard interface. This small water heater is ideal for spaces such as kitchens, apartments, bathrooms, RVs, and camping. TIP: Install vertically to avoid malfunction of the heating elements (E2).
- ✔ IMPORTANCE FOR INSTALLATION - ① The 110v water heater is vertical installation only, no horizontal installation is allowed, to avoid malfunction of the heating elements (E2). ② The electric tankless water heaters tighten the pipe connectors with Teflon tape to prevent a short circuit (E2). ③ This tankless hot water heater is recommended to be connected with wires with a cross-sectional area of ≥ 2.5 square millimeters, and connected to trip switches of over 32a for use.
- Flow rate of 0.4 - 8.4 GPM
- Available temperature settings range from 100 to 140F (default setting of 120F)
- Includes electric ignition
- Covered under 1 year labor, 15 year heat exchanger, and 5 year parts manufacturer warranties
- Width 17-11/16-in
Best Tankless Water Heaters on Amazon: Reviews and Buying Guide (2024)
In recent years, tankless water heaters have become increasingly popular due to their energy efficiency and convenience. As we enter 2024, many consumers are searching for the best tankless water heaters available on Amazon. These units heat water on demand, eliminating the need for a bulky storage tank, thus saving space and energy costs. This article provides a detailed review of the top 10 tankless water heaters available on Amazon, along with a buying guide to help you choose the right one for your needs.
Top 10 Best Tankless Water Heaters on Amazon
1. Rinnai V65iP 6.6 GPM Tankless Propane Water Heater
The Rinnai V65iP is a powerful propane tankless water heater that delivers up to 6.6 gallons per minute (GPM) of hot water. It features a compact design, which makes it easy to install in small spaces. Its electronic ignition system ensures quick start-up, and the unit is equipped with a 150,000 BTU max input. One of its notable features is the Wi-Fi compatibility, allowing you to monitor and control your unit remotely through a smartphone app. The Rinnai V65iP is also Energy Star certified, meaning it meets strict energy efficiency guidelines, helping reduce energy bills.
- Smart-Circ Intelligent Recirculation: Tankless hot water heater offers a built-in recirculation pump and Smart-Circ technology that learns your water use patterns, then schedules pump and recirculation accordingly for energy efficiency and convenience
- Never Run Out of Hot Water with this Compact Tankless Gas Water Heater: This non-condensing indoor tankless hot water heater from Rinnai is only the size of a small suitcase, but provides up to 6.1 GPM (5 fixtures at once)
- Smart, Durable Design: Water heater fits a wide array of spaces; Includes 15-, 5-, and 1-year residential guarantee for heat exchanger, labor, and parts, respectively; See Controlr module for WiFi control (not included)
- Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to locate a qualified technician in your area to install your tankless water heater; We do not recommend installing a water heater without a technician
- Find Your Rinnai: See our product guides, manuals, energy guide, warranty information, videos, and tables to find the right tankless water heater for your home; Check our Ground Water Temperature Map to see if this heater is optimal for your region
2. EcoSmart ECO 27 Electric Tankless Water Heater
The EcoSmart ECO 27 is an electric tankless water heater that is well-suited for both residential and commercial use. This unit provides an impressive 27 kW output, delivering hot water at a rate of 3.5 GPM. It features a self-modulating technology, which adjusts the energy consumption based on your hot water demand, ensuring efficient operation. With its digital temperature control, you can set the temperature anywhere from 80°F to 140°F. The ECO 27 is also compact and lightweight, making installation a breeze.
- Configured for climates where incoming water temperature can reach as low as 37 degrees.
- Capable of heating nearly 3 gpm.
- Digital temperature control allows temperature settings in 1 degree increments.
- Voltage - 240
- Single phase
3. Stiebel Eltron Tempra Plus 24 kW Tankless Electric Water Heater
The Stiebel Eltron Tempra Plus offers advanced technology with its modulating flow rate that ensures a constant temperature even with varying water demands. This electric tankless water heater can provide 4 GPM, sufficient for homes with multiple bathrooms. Its patented Advanced Flow Control technology automatically adjusts the flow of water to ensure a consistent output temperature. The unit is compact and can be installed both indoors and outdoors. With a sleek design and digital display, the Tempra Plus is both functional and aesthetically pleasing.
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4. Rheem RTE 13 Electric Tankless Water Heater
The Rheem RTE 13 is a compact, point-of-use electric tankless water heater, specifically designed for small spaces. It delivers hot water at a rate of 2.5 GPM, which is ideal for single applications like sinks or showers. The unit’s rugged copper heat exchanger ensures durability, while its self-modulating technology optimizes energy efficiency. Installation is straightforward, making it an excellent choice for those looking for reliable hot water without the need for a large unit.
- External adjustable digital thermostatic control with LED display (+/1 degree accuracy
- Durable Copper immersion two heating elements, field Serviceable.Self-modulating power control
- Simple installation – 1/2 NPT adapters included; side 1/2 inch Compression water connections
- 99.8% energy efficient. External controls to adjust temperature in increments of 1°f. Water-Saver Shower Head – 1.5 GPM
- Threaded for easy replacement, simple installation, digital temperature display 54 A. 13kW Model Flow Rate: up to 3.17 GPM
5. Takagi T-H3-DV-N 199,000 BTU Natural Gas Tankless Water Heater
The Takagi T-H3-DV-N is an advanced natural gas tankless water heater designed for larger households. With a maximum output of 199,000 BTUs and a flow rate of up to 10 GPM, this unit is capable of supplying adequate hot water to multiple outlets simultaneously. Its energy-efficient design and low NOx emissions contribute to a reduced environmental footprint, and the built-in condensing technology maximizes efficiency. The Takagi T-H3-DV-N is perfect for those looking for a high-capacity solution for their hot water needs.
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6. Marey MA12NG Tankless Water Heater
The Marey MA12NG is an energy-efficient natural gas tankless water heater ideal for small to medium households. It offers a maximum output of 3.1 GPM, which is suitable for simultaneous use in multiple fixtures. Its compact size allows for easy installation, and it can be mounted either horizontally or vertically. The digital display provides real-time temperature readings, giving you complete control over your hot water supply. Additionally, the Marey MA12NG is designed with safety features, including overheat protection and a flame failure device.
- Efficient Performance, Smart Design: Our advanced technology ensures high efficiency and long-lasting durability, boasting a powerful 170,000 BTU capacity. Its user-friendly display allows for dynamic power adjustment tailored to your specific needs.
- Full-house Endless Hot Water: Enjoy unlimited hot water with up to 3-4 use points running simultaneously, fulfilling all household or light-commercial needs.
- Certified Quality: CSA certified in the USA and Canada, guaranteeing top safety, quality, and durability standards. Multiple security layers, including overheat, flame failure, and anti-freezing features, ensure worry-free operation.
- Save Space and Installation-time: Free up storage space with a compact wall- mounted design. Simplify installation with its standard 3” size exhaust venting. (Note: Not recommended for elevations above 2,000 ft.)
- This propane gas tankless water heater comes with a 5 years limited warranty by manufacturer.
7. Eccotemp FVI12-LP Gas Tankless Water Heater
The Eccotemp FVI12-LP is a propane-powered tankless water heater that balances affordability with performance. It provides hot water at a flow rate of up to 4 GPM, making it suitable for residential use. The unit features a compact design, which is perfect for RVs, cabins, or homes with limited space. With its digital thermostat and remote control, adjusting the temperature is easy and convenient. The Eccotemp FVI12-LP also includes safety features like overheat protection and a freeze protection system.
- Whole home indoor, gas powered tankless water heater, rated at 3.6 GPM that activates only when in use, making it an energy saver.
- For indoor installation with safe, efficient power ventilation and perfect for any small home, cabin or apartment.
- Easy to read digital temperature display, on a compact and space-saving design with minimal noise output.
- Safe electronic ignition system; plugs into standard 120v electrical outlet with UL-listed cord.
- Uses standard 1/2" NPT water fittings and is equipped with easy to use manual water temperature controls.Minimum 0.65 GPM flow rate
8. Bosch Tronic 3000 Electric Mini-Tank Water Heater
The Bosch Tronic 3000 is a mini-tank electric water heater perfect for point-of-use applications. It provides 2.5 gallons of hot water instantly, making it suitable for sinks or other small appliances. The compact design allows for easy installation, either under a sink or on the wall. It operates on 120V and can provide water up to 145°F, delivering instantaneous hot water while minimizing wait times. While not a traditional tankless water heater, its efficiency and convenience make it a worthy mention in this category.
- CONVENIENT HOT WATER HEATER: 7 gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it. Thermal efficiency is 98%. Dimensions : 17.5 W x 17.5 H x 14.5 D Inches
- INSTALLED VERTICALLY OR HORIZONTALLY: This larger model can be mounted vertically (5.1 gal. of water supply) or horizontally (7 gal. of water supply)- vertical orientation is installed with the cold and hot lines on top of the unit
- RELIABLE WATER SOURCE: Easily hard-wire the 7-gallon model to provide the on-demand reliable water source your home or office needs
- IMPORTANT INFORMATION: Heating capacity of 1440 watts and a temperature range of 65-145°F max. Operating pressure-150 psi. Water fittings-3/4 inch Male NPT. Electrical requirements (Amp 12A/Volts 120)
- EASILY MOUNTED: Can be shelf or floor mounted. Wall mounting available in vertical orientation only (water connections on top) - bracket included. Simply tap into the cold water line and install the water heater directly at the sink to provide hot water
9. Eccotemp L5 Portable Tankless Water Heater
The Eccotemp L5 is a portable tankless water heater that is ideal for off-grid living, camping, or outdoor activities. It runs on propane and can provide hot water on demand at a flow rate of 1.5 GPM. With a compact and lightweight design, the L5 can be easily transported and set up anywhere. It includes a 20-minute shut-off timer and the ability to connect to a showerhead or garden hose, making it versatile for various scenarios. Its affordability and portability make it a favorite among outdoor enthusiasts.
- Lightweight, easy to carry, and compact, making it great for camping, off-grid use, washing your pets and outdoor showers.
- Runs on a standard 20 lb. Liquid Propane tank and is equipped with an electronic ignition. Powered by 2 “D” cell batteries, making it ideal for on-the-go.
- Features a safety shut off that is activated when the unit runs longer than 20 minutes or is tilted more than 45 degrees in either direction.
- Low pressure activation of 20 PSI and is easy to connect to any standard garden hose.
- Rated at 1.5 GPM of hot water output. With an achievable temperature range of 50 – 140 degrees F.
10. Sinopé Électronique SMART TANKLESS Water Heater
As an innovative addition to this list, the Sinopé Électronique SMART tankless water heater stands out with its smart home compatibility. This electric model features advanced Wi-Fi connectivity that allows you to control the temperature remotely via a smartphone app. It provides a steady flow of hot water and is designed with energy-saving technology that optimizes performance in real-time. Its installation process is straightforward, making it accessible for homeowners looking for a smart solution for their hot water needs.
- 【INSTANT HOT WATER HEATER】With DOYXC Mini tankless water heater electric 110v, you will say goodbye to long waiting time for hot water, this 110 volt water heater electric uses advanced technology to heat water to 82°F (0.3 GPM) - 131°F (0.5 GPM) in seconds, no need to preheat, eliminating the long waiting time for hot water by the sink!
- 【COMPACT PORTABLE DESIGN】This small water heater electric has a compact design, perfect for spaces such as kitchens, RVs and camping. The Larger the water flow, the lower the outlet temperature; The smaller the water flow, the higher the outlet temperature. This on demand water heater is wall-mounted, freeing up valuable space in your home so you can enjoy hot water whenever and wherever you need it. Point of use water heater produces comfortable water temperatures for washing food, dishes, clothes, faces, hands and more.
- 【SAFETY INTELLIGENCE RELIABLE】This under sink water heater electric has multiple protection features. ipx4 waterproof, leakage protection, dry burning protection, super mild and automatic power off in non-working condition. Tankless hot water heater with LCD digital display, intelligent detection of working status and performance to ensure safety.
- 【EASY INSTALLATION & IMPORTANT NOTES】This on demand hot water heater electric has a simple design and is quick and easy to install, saving time and labor. Our instant water heater under sink comes with pre-fabricated set screw holes, English instructions and 1/2 inch NPT standard connections. TIP: Electric water heater wiring requires 2.5mm ² (13AWG) with a circuit breaker ≥32AMP. Not Suitable for Shower(Shower normally requires at least 1.8 GPM). Under sink water heater 110v plug in.
- 【ENERGY EFFICIENT】The instant hot water heater under sink utilizes a variable frequency design that automatically adjusts the input power according to the flow rate and temperature settings. Unlike tank-type water heaters, Electric water heater tankless have a thermal efficiency of up to 99%. When the water flow rate decreases, the system will consume the least amount of electricity, effectively reducing energy waste.
Buying Guide: Choosing the Best Tankless Water Heater
When selecting the best tankless water heater, various factors must be considered to ensure you choose a model that meets your specific needs. Here are some essential points to ponder:
1. Fuel Type
Tankless water heaters are available in different fuel types, including electric, natural gas, and propane. Each type has its advantages and disadvantages:
- Electric: Generally easier to install and maintain, they may have higher operational costs, depending on local electricity rates.
- Natural gas: Typically more energy-efficient and can provide higher flow rates, but may require more complex installation due to venting requirements.
- Propane: Similar advantages to natural gas, but availability can be a concern in some areas.
2. Flow Rate
The flow rate, measured in gallons per minute (GPM), indicates how much hot water the unit can provide at once. Consider your household’s hot water demands, such as how many showers, faucets, or appliances will run simultaneously. It’s crucial to choose a unit that meets your maximum flow requirements.
3. Temperature Rise
Temperature rise is the difference between the incoming groundwater temperature and the desired output temperature. A larger temperature rise requires more powerful heating elements, affecting the unit’s size and cost. Be sure to check the specifications to ensure the heater can achieve your desired temperature in your local climate.
4. Energy Efficiency
Tankless water heaters are generally more energy-efficient than traditional tank heaters. Look for models that feature Energy Star certification or have high thermal efficiency ratings. Units with self-modulating technology can adjust energy usage based on demand, further increasing efficiency.
5. Size and Installation
Tankless water heaters come in various sizes based on their GPM output. Ensure you have adequate space for installation and consider whether you want an indoor or outdoor model. Additionally, assess the installation requirements, as some units may necessitate professional installation.
6. Budget
The price of tankless water heaters can vary significantly depending on the fuel type, capacity, and features. Set a budget that aligns with your hot water needs and explore models within that range. Keep in mind the long-term savings on energy bills can often offset the higher initial purchase and installation costs.
In conclusion, selecting the best tankless water heater involves considering various factors, including fuel type, flow rate, temperature rise, energy efficiency, size, and installation requirements. With the right information and understanding of your specific needs, you can confidently choose the best tankless water heater for your home.
With this overview of the best tankless water heaters on Amazon for 2024, consumers can make informed decisions. Whether you prioritize efficiency, space-saving designs, or innovative technology, these options cater to a range of requirements, ensuring you have access to continuous hot water when you need it most.
Last update on 2026-03-14 / Affiliate links / Images from Amazon Product Advertising API | hishecozy.com is a participant in the Amazon Associate program and will earn from qualifying purchases.
