13 best rheem tankless hot water heaters

Rheem is a well-known manufacturer of tankless hot water heaters, also referred to as tankless water heaters or on-demand water heaters.These appliances are designed to provide hot water on demand without the need for a storage tank, making them energy-efficient and space-saving solutions for heating water in homes and businesses. Here's what you should know about Rheem tankless hot water heaters:

  1. Energy Efficiency: Rheem tankless water heaters are known for their energy efficiency. They only heat water when it's needed, eliminating standby heat loss associated with traditional tank-style water heaters. This can result in significant energy savings over time.

  2. Continuous Hot Water: Tankless water heaters can provide a continuous supply of hot water, making them suitable for households with high hot water demand. You won't run out of hot water during showers or other activities.

  3. Variety of Models: Rheem offers a range of tankless water heater models with different sizes and capacities to suit various needs. Whether you need a unit for a small apartment or a large family home, there's likely a Rheem tankless water heater that fits your requirements.

  4. Gas and Electric Options: Rheem provides both gas-powered and electric tankless water heaters. Gas models typically offer higher flow rates and are ideal for larger homes with heavy hot water usage, while electric models are suitable for smaller households or areas with limited gas supply.

  5. High-Altitude Performance: Some Rheem tankless water heaters are designed to perform well at high altitudes, making them suitable for installation in mountainous regions.

  6. Digital Controls: Many Rheem tankless water heaters come with digital controls and displays, allowing users to set their desired water temperature and monitor system performance easily.

  7. Condensing Models: Rheem also offers condensing tankless water heater models, which are even more energy-efficient as they capture and reuse exhaust heat.

  8. Warranty: Rheem typically provides a warranty on their tankless water heaters, giving consumers peace of mind regarding the product's reliability.

It's important to note that the specific features, performance, and warranty terms may vary depending on the particular model of Rheem tankless water heater you choose. Proper installation and maintenance are crucial for ensuring the longevity and efficient operation of these appliances, so it's advisable to consult with a professional plumber or HVAC technician for installation and ongoing maintenance.

Please refer to Rheem's official website or authorized dealers for the most up-to-date information and product specifications related to their tankless hot water heaters.

Below you can find our editor's choice of the best rheem tankless hot water heaters on the market
  

Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater, GRAY

Rheem

Based on 456 reviews Check latest price

Product description

Professional classic® tankless electric water heaters offer continuous hot water quick and on demand for single point-of-use or multiple applications

  • 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
  • 54 A

User questions & answers

Question: We have a 500sq' apt. 1 kitchen sink, 1 lav sink and tub/shower. This tankless heats water to both sinks but nothing to the tub/sh. Help
Answer: Sinks have aerators to slow down the water where a tub doesn't. It sounds like one possibility is that your exceeding the GPM for this heater. Next possibility, double check an measure your actually getting at least 240v at the heater, I had an issue where my unit was only getting 235v an it was causing a similar issue where only one of the two heating elements was activating. I had it set to 125F but it was coming out 100F. It was warm and without a meter I would of thought it was working correctly until I tried filling a tub. It couldn't even get the water warm. I pulled my wires out an restripped an cut an screwed them in an it fixed my problem, now its measuring around 245v. Make sure there is no copper showing after screwing down your input wires. Now filling the tub I noticed after about 10-15 seconds the water gets too hot to touch. I set it to 135F.
Question: Do these tankless water heaters require an overflow line to the outside of the home or a pan like is required on normal water heaters
Answer: No tank, so, no overflow line required. It mounts on the wall. A pan is needed if required by building code in your city.
Question: what are the wiring and power requirements
Answer: good morning,60 amp breaker and , number 6 cable !thank you have a great day!
Question: How many amps are needed for rheem rtex - 13 240v heating tankless electric water heater
Answer: Hello-The RTEX-13 requires 1x 60A@240V breaker / 6 AWG recommended wire size.Specs - http://cdn.globalimageserver.com/fetchdocument-rh.aspx?name=Specification-Sheet&id=fc3235b7-7cd0-42cd-93bc-7169ea92be31 Rheem 800-432-8373I hope this helped :)Ben

Product features

About Us

Brothers Richard and Donald Rheem founded Rheem Manufacturing Company in Emeryville, CA, in 1925. While the company has produced a number of products in its nearly 100 years of operation, Rheem is currently the manufacturer that produces heating, cooling, water heating, pool & spa heating and commercial refrigeration products, and it is one of the largest manufacturer of water heating products in North America.

Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray

Rheem

Based on 257 reviews Check latest price

Product description

This water heater offers quick, continuous hot water that is on demand for single point-of-use or multiple applications.Robust copper immersion heating elements with brass top increases durability and are threaded for easy replacement. Digital temperature control allows you to set your temperature in increments of 1°

  • ON/OFF Dial Control with adjustable digital temperature display
  • Self-modulating power control
  • 24kW Model Flow Rate: up to 5.9 GPM for RTEX-24
  • Bottom 3/4" NPT water connections
  • On demand, consistent and continuous hot water

User questions & answers

Question: Can this directly replace a 40 gal tank heater with a 30A double pole breaker? What are power requrements
Answer: No it can't. RTEX-24 requires 3 sets of wire and ground, and it needs 3x 40amp breaker. That's a total of 120amps
Question: Can you use the 10/3 for one of the cicuits
Answer: No. It requires three legs of 8-2.
Question: Can the unit operate as a rtex-18 if i only hook up 2 of the elements? because i only need the 18 specs as of now but would like the option to upgrade
Answer: Actually you can do this but you must be careful on which circuits are connected. Rheem says the elements are activated from right to left as power is required. The right most element connection also provides power to the control so this must always be connected. If the very left element is left disconnected, you will only get 2/3 of the rated power on a 3 element unit.
Question: Why are 2 answers for the breaker requirements. Is it 3 double 40 or 3 double 60 amp
Answer: If the unit draws 40 amp. you need a 2 pole 40 amp breaker 2 #8 wires good for 40 amp and 1 # 10 wire for a bond. Now if the unit draws 60 amps you need 2 # 6's good for 65 amps. A 2 pole 60 amp breaker and 1 # 8 for a bond( ground wire).

Product features

Rheem 240V 3 Heating Chambers RTEX-24 Residential Tankless Water Heater

Professional Classic tankless electric water heaters offer continuous hot water quick and on demand for single point-of-use or multiple applications.

Performance Features

  • On demand, continuous hot water
  • Compact and stylish with digital temperature control in increments of 1°F ranging from 80°F to 140°F
  • 99.8% Energy efficient
  • Robust copper immersion heating elements with brass top increases durability and are threaded for easy replacement
  • Simple Installation
  • Digital temperature display

Applications

  • Standard Hand Sink – 0.5 GPM
  • Washing Machine – 1 to 1.5 GPM
  • Kitchen Sink – 1 to 2 GPM
  • Dishwasher – 1 to 2 GPM
  • Water-Saver Shower Head – 1.5 GPM
  • Standard Shower Head – 2.0 GPM
  • Bath Tub – = 4 GPM
  • Whole-Home – up to 6 GPM

Average Gallons Per Minute (GPM) based on 2010 Plumbing Standards.

Unique Features

  • External Digital Thermostatic Control with LED display (+/- 1 degree accuracy)
  • Most advanced self-modulation, adjust power to meet hot water demand
  • Durable Copper Immersion three heating elements, field serviceable
  • Simple Installation – Bottom 3/4"NPT water connections

EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology

EcoSmart

Based on 2 reviews Check latest price

Product description

This Smart Technology electric tankless water heater is configured as a "whole home" model for climates where incoming water temperature is 67°F and above. This model is well suited for heating up to 2-Gallon per minute, which is the equivalent of one shower head (with a 1.5 gpm flow) and one sink with a low inlet water temperature of 67°F and an output setting of 105°F. Digital Temperature Control allows you to set your temperature in increments of 1 Degree. This model can also be used in colder climates as a Point of Use for a sink or other low flow application. All tankless water heaters are sized based on flow rate and temperature rise, and there is a direct relationship between the two. So if used in a cold area requiring a high temperature rise, it will be more limited in the amount of fixtures (gallons per minute) it can heat at one time compared to a warmer climate. When sized properly this water heater will provide endless hot water and only consume the energy needed, giving the user complete control. Prior to purchase and installation please verify this model is the right size for the expected demand and electrical requirements. The ECO 11 requires a minimum 125 amp electrical panel for installation with 60 amp double pole breaker connected to set of #6 awg wire. Plumbing connections are 1/2" compression fitting with the option of 1/2" NPT adapter included. For additional assistance please feel free to contact our support center at 877-474-6473.



NOTE : 11Kw at 220 is equal to 13kw at 240. .Activation Flow : 0.3 GPM

From the Manufacturer

This Smart Technology electric tankless water heater is configured for climates where incoming water temperature is 67 Degree F and above. This model is well suited for heating up to 2-Gallon per minute, which is the equivalent of one shower head (with a 1.5 gpm flow) and one sink with a low inlet water temperature of 67 Degree F. Digital Temperature Control allows you to set your temperature in increments of 1 Degree. This model can also be used in colder climates as a Point of Use for a sink or other low flow application. Prior to purchase and installation please verify this model is the rights size for your hot water needs and electrical requirements.

  • Lifetime warranty
  • Save up to 60-percent on your water heating cost with an ECOSMART electric tankless water heater
  • Never run out of hot water with an ECOSMART tankless water heater
  • Patented Self Modulating Technology and design
  • ECOSMART tankless water heaters are 99.8-percent energy efficient.Uniform Energy Factor:0.98

User questions & answers

Question: Ours has only been in service for less than a year - will not adjust temperature to anything above 85 Deg. F. What do you think is the problem ? kds
Answer: My only guess is that the rheostat (variable resistor) that the temperature adjustment knob is attached to may be faulty. If that isn't it then I don't know. Sorry.
Question: The warrenty says that this unit must be installed by a licensed electrician and plumber, for them to honor the "life time warrenty." why
Answer: Hello Bob, The reason is the same as why an innumerable number of gadgets around the world have that little "warranty void if removed" label. Because getting inside of one requires a certain level of training and expertise. Same with this unit. GadgetsGo is an authorized Ecosmart dealer. Kind regards,HenryGadgetsGo
Question: My house is wired 110V. What additional items do I need to purchase for the conversion
Answer: Just to expand slightly on prior answers, normally a residential service feed is 240 volts between the two incoming hot legs. There is also a neutral leg, which (hopefully) has zero potential with reference to ground. The voltage between either one of the hot legs and the neutral leg is 120 volts. The 120 volt circuits in your house are connected to one or the other of the two hot legs, and only one. An attempt is made to assign circuits to the two hot legs in a way that will roughly balance the load between them. The other side of a 120 volt circuit is connected to the neutral leg. There is additionally a safety ground run with the circuit, which also ties into the panel. Certain devices require more power (work product of current and voltage) than is practical to deliver using a 120 volt circuit. Common examples are your clothes dryer, and your electric stove. These devices are powered by both hot legs, with a difference in potential of 240 volts. This water heater is also such a device.STRONG BUT FRIENDLY WARNING: If you did not already know this, please don't make wiring this water heater your learning opportunity with electricity. Hire someone who knows how to do it right. Cutting corners, especially with higher currents and voltages, can lead to equipment damage, fire, and electrocution. Electricity is not magic, and you can certainly learn how to do many common wiring tasks safely on your own, but today is not the day to begin that journey. You need properly sized components, properly installed, and connected to an adequate service. Also, if you really, really foul up, you could conceivably wind up making that morning shower more energizing than you ever imagined, if you get what I mean. So newly aspiring electricians should go fix their grandmother's favorite table lamp instead. Once they have that working they can use it to to start reading books about electricity, residential wiring, and eventually, books about this stuff: http://amazon.com/s/ref=nb_sb_ss_c_0_8?url=search-alias%3Dstripbooks&field-keywords=nec+code&sprefix=nec+code%2Caps%2C164 . Of course, you still have to know not to nick conductors when you strip them, and other trade craft like that ; ) . Like almost everything in life that is fun, electricity will hurt you. Sort of like all those people you dated for a while, and then wished later you had never met.
Question: what amp breaker is required
Answer: The National Electrical Code requires conductors and overcurrent protection to be sized at 100% of the manufacturer's branch circuit recommendation for tankless electric water heaters. A 60 amp breaker is the same price as a 40 or 50, it is the wire that costs more. #6 AWG wire is required for a 60 amp circuit. If you undersize the wire it could overheat and catch fire. Protect your family and follow the manufacturer's sizing for this, or any other, electrical device. Your family's lives are worth the extra money. 

Product features

3 Smart Steps for Endless Hot Water

Step 1: Determining your average inlet water temperature is important, this allows you to determine how well your unit will perform in your desired location. A lower inlet water temperature will require a higher kilowatt product.

Step 2: Next you will determine how many applications your unit can run simultaneously at your chosen location inlet water temperature. Tankless electric water heaters are sized for maximum simultaneous use, not maximum fixtures in your home.

Step 3: Determining specifications and electrical infrastructure is important because without the correct infrastructure your unit may not fit into your breaker panel.

Rheem RTEX-06 6kW 240V Point of Use Electric Tankless Water Heater, Gray

Rheem

Based on 48 reviews Check latest price

Product description

This water heater offers quick, continuous hot water that is on demand for single point-of-use or multiple applications.Robust copper immersion heating elements with brass top increases durability and are threaded for easy replacement. Simple installation and digital temperature display.

  • Push-button ON/OFF control with LED temperature display
  • 6 kW Model Flow Rate: up to 1.0 GPM
  • Perfect for 1 or 2 sinks
  • Bottom 1/2" NPT water connections
  • On demand, consistent and continuous hot water

User questions & answers

Question: The push on/off bottom. Not turn on the unit
Answer: No it turns on when it needs to heat the water
Question: What is the gallons per minute on this unit
Answer: 1 gallon per min max, 0.5 gallons per min optimum.
Question: Does it have a thermostat to limit output temperature
Answer: Hello- The Rheem RTEX-04 and RTEX-06 are not thermostatic, so it only displays the temperature of output. Thanks Ben
Question: Will this work with a double 30 amp breaker and number 10 wire because that's what I have there now thank you
Answer: yes

EcoSmart ECO 27 Electric Tankless Water Heater, 27 KW at 240 Volts, 112.5 Amps with Patented Self Modulating Technology,White

EcoSmart

Based on 3 reviews Check latest price

Product description

Configured for cold climates or high flow rates. Well suited where incoming water temperature can drop below 45 F. For use in more demanding water usage applications. Self modulating flow sensor technology regulates the amount of energy required to heat the water needed. Digital temperature display showing the outlet water temperature setting. Uses 9 KW standard Emerson electric heating elements with brass tops to prevent electrolysis. Copper heat exchanger. Automatic resettable thermostat. 40 DP breakers required. 112A draw. Required wire: 3 sets 8 AWG. Pipe fitting: 3/4'' NPT. Energy efficiency: 99.8%. UL and CSA certified.Weight: 11 lb. Lifetime warranty. It can provide between 2.7 and 6.5 gallons-per-minute depending on the inlet water temperature.

From the Manufacturer

This Smart Technology electric tankless water heater is configured for climates where incoming water temperature can reach as low as 37 degrees. The ECO 27 is capable of heating nearly 3 gallons per minute at this temperature. The ECO 27 is the largest electric tankless water heater available with Patented Self Modulating Technology. This model is well-suited for homes in the northern U.S., Canada, and in the southern U.S. for large Roman-style or Jacuzzi tubs that generally have more demanding water usage needs. Digital temperature control allows you to set your temperature in increments of 1 degree. Prior to purchase and installation please verify that this model is the right size for your hot water needs and electrical requirements.

  • Savings of up to 50% on water heating costs. Dimensions :17H x 17W x 3.625D inches ;Pipes fittings :3/4 inch NPT
  • Digital temperature control in 1-degree increments allows control of hot water; Activation Flow: 0.3 GPM
  • Copper and stainless components designed for efficiency, durability and easy replacement.
  • Compact size saves valuable storage space, while the stylish and advanced design is pleasing to the eye and Copper and stainless components designed for efficiency, durability and easy replacement.
  • Prior to purchase & installation, please verify that this model is the right size for your hot water needs and electrical requirements. Electrical requirements: 27 kW, 240 volts, 40 required breakers, 112.5 maximum power (AMP), 8 required wire.Amperage Draw:113 A
  • Required Breaker Quantity: Three 40 Amp Double Pole
  • Recommended Electrical Panel: 200 Amps

User questions & answers

Question: How do know which size to buy? We will supply two bathrooms, dish washer, clothes washer. What size should I choose
Answer: In order to have a 208 volt power you would need to be pulling off of 2 legs of a 3 phase service. Are you sure you have 3 phase?
Question: Can this unit supply a 3,700 sq foot home with 3 1/2 baths
Answer: Approx 7x11. The cover is approx 8x12
Question: What is the power consumption of this tank-less heater
Answer: This is a 240V/208V heater. At 240V this heater draws 6.25 amps.
Question: remote
Answer: Are you asking if it can be wired 208 volt? The answer is yes. I don't have any experience with model you are referring to otherwise.

Product features

3 Smart Steps for Endless Hot Water

Step 1: Determining your average inlet water temperature is important, this allows you to determine how well your unit will perform in your desired location. A lower inlet water temperature will require a higher kilowatt product.

Step 2: Next you will determine how many applications your unit can run simultaneously at your chosen location inlet water temperature. Tankless electric water heaters are sized for maximum simultaneous use, not maximum fixtures in your home.

Step 3: Determining specifications and electrical infrastructure is important because without the correct infrastructure your unit may not fit into your breaker panel.

Rheem RTEX-18 18kW 240V Electric Tankless Water Heater, small, Gray

Rheem

Based on 466 reviews Check latest price

Product description

This water heater offers quick, continuous hot water that is on demand for single point-of-use or multiple applications.Robust copper immersion heating elements with brass top increases durability and are threaded for easy replacement. Digital temperature control allows you to set your temperature in increments of 1°

  • 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

User questions & answers

Question: Can this be used in a recirculating system
Answer: No where on the box does it say contains copper. Box reads.... 100% nonstick surface - hand washable and dishwasher safe- PFOAF Free, PTFE- fiberglass coating, safe up to 500 degrees, FDA approved. We are happy with our purchase.
Question: How many amps
Answer: Of course it can.
Question: how many breakers and what amp
Answer: No
Question: will this supply two showers, washer and dishwasher for two people? (1000 sf house
Answer: Made in China

Ecosmart POU 3.5 Point of Use Electric Tankless Water Heater, 3.5KW@120-Volt

EcoSmart

Based on 531 reviews Check latest price

Product description

This electric tankless water heater is a true Point of Use Model because it is specifically designed for under the sink, single applications with a maximum flow rate of 0.5-Gallon per minute (gpm) and includes a 0.5 gpm sink aerator. This heater is flow controlled, meaning the temperature will adjust according to flow rate. It is the smallest sized Ecosmart electric tankless model and should not be used to run anything more than one sink at a time or used in areas where inlet water temperature is lower than 57°F. At this inlet temperature the ECO POU 3.5 can heat 0.5 gallons per minute to 105°F. Its compact size allows for under the sink installations. The Point of Use models are ideal for: Wet Bars, Strip Malls, Doctor's Office, Boats, Recreational Vehicles (RVs), Bathroom Sinks. When sized properly this water heater will provide endless hot water. Prior to purchase and installation please verify this model is the right size for the expected demand and electrical requirements. The Eco POU 3.5 requires a minimum 100 amp electrical panel for installation with 30 amp single pole breaker connected to #10 awg wire. Plumbing connections are 1/2" NPT. For additional assistance please feel free to contact our support center at 877-474-6473. TROUBLE SHOOTING STEP: When the water is not hot enough, please slow down the flow of water to increase temperature!

From the Manufacturer

This electric tankless water heater is a true Point of Use Model because it is specifically designed for under the sink, single applications with a maximum flow rate of 0.5-Gallon per minute (gpm) and includes a 0.5 gpm sink aerator. Its compact size allows for under the sink installations. The Point of Use models are ideal for: Wet Bars, Strip Malls, Doctor's Office, Boats, Recreational Vehicles (RVs), Bathroom Sinks. Prior to purchase and installation please verify this model is the rights size for your hot water needs and electrical requirements.

  • Can provide hot water for one sink at 0.5 GPM in warmer climates
  • Requires 1 x 30 amp breaker and 10 AWG wire
  • For one sink at 0.5 GPM in colder climates the POU 6 is recommended
  • Amperage Draw 29 amp. kW - 3.5 kW
  • Connection Fittings 1/2" NPT

User questions & answers

Question: Can the flow rate be adjusted up from 0.5gpm to say 1gpm or 1.5gpm (understood that the output water will be corresponding less hotter)? thanks in adv
Answer: This is a 199,000 btu model, a 3/4" gas line is required to have sufficient gas supply.
Question: degree water going in what degree will be at the tap
Answer: rinnai recommends the GTK03 Grundfos kit for this unit
Question: are any of these tankless water heaters plug in
Answer: I think, you need buy a WiFi module, call Rennai and ask. Circ-logic did not work for me, I had to install re circulation pipe. Because of the high minimum flow requirements, this unit did not work with any regular re circulation pump, so wasted money buying a Watts pump. And paid double for the labor. Rennai told me that I should have bought their thankless heater with re-circulation built in.
Question: Would you recommend this model for a shower in a guest bathroom
Answer: IT CAME WITH ADAPTERS ON THE TOP. NO PIPING.

Product features

3 Smart Steps for Endless Hot Water

Step 1: Determining your average inlet water temperature is important, this allows you to determine how well your unit will perform in your desired location. A lower inlet water temperature will require a higher kilowatt product.

Step 2: This product is fixed flow, which means that the output temperature rise of this product is determined by flow rate of the application. This chart gives you the expected temperature rise for various sink flow rates from 0.5 to 1.5 gallons per minute.

Step 3: Determining specifications and electrical infrastructure is important because without the correct infrastructure your unit may not fit into your breaker panel.

Rheem 240V 4 Heating Chambers RTEX-36 Residential Tankless Water Heater, GRAY

Rheem

Based on 36 reviews Check latest price

Product description

Professional classic tankless electric water heaters offer continuous hot water quick and on demand for single point-of-use or multiple applications

  • External digital thermostatic control with LED display (+/1 degree accuracy)
  • Most advanced self-modulation, adjust power to meet hot water demand
  • Durable Copper immersion four heating elements, field Serviceable
  • Simple installation – bottom 3/4 inch NPT water connections
  • Threaded for easy replacement, simple installation, digital temperature display.Amperage:150 amps.A max flow of 8.0 GPM

User questions & answers

Question: What is it gpm
Answer: The Rheem RTEX-36 (240V) will provide 2.5 GPM at a 98 degree F temperature rise and 6 GPM at a 30 degree F temperature rise. Please contact Rheem technical support at 800-432-8373 for further information.
Question: will this work to fill a garden tub
Answer: Hello- That should be large enough to fill a garden tub with no problem. I would definately look at, and make sure the electrical requirements can be met ( which are quite large for that unit ) For help sizing - call Rheem - 800-432-8373 Thanks Ben
Question: Is it good enough for a single family home of 3 bathrooms, dishwasher, washing machine
Answer: Yes; I have 4 bathrooms, dishwasher and washing machine. Generally, I only run two at a time - washer and dishwasher or washer and one shower.
Question: Will this unit modulate the power to meet the demand
Answer: I don’t understand the question but it meets my demand and I have 4 bathrooms.

Rheem RTEX-08 8kW 240V Tankless Electric Water Heater, Gray

Rheem

Based on 67 reviews Check latest price

Product description

This water heater offers quick, continuous hot water that is on demand for single point-of-use or multiple applications.Robust copper immersion heating elements with brass top increases durability and are threaded for easy replacement. Digital temperature control allows you to set your temperature in increments of 1°

  • ON/OFF Dial Control with adjustable digital temperature display
  • Self-modulating power control
  • 8kW Model Flow Rate: up to 1.95 GPM
  • Side 1/2" NPT water connections
  • On demand; continous hot water

User questions & answers

Question: Cuantos kw,tiene por favor gracias
Answer: 8kw, 33amps, 240volts, one 40amp breaker needed, 8 AWG wire needed
Question: Will this work for a 50 amp RV Motorhome that is connected to shore power and or using generator for power
Answer: It calls for a 38amp breaker and needs a heaver gage wire than what might be in your RV Runing a 50 amp service with the w heater in service as soon as the AC or your stove cut on you will trip your service breaker Good thought I also have a fith wheel and a sports cruiser boat with 50 amp service and generators If you ran just the water heater by it self when you needed hot water you could make it work
Question: I have 100 amp in my building. will that work
Answer: Hello Manuela, This unit requires 240 volts and a 40 amp breaker accordingly. You should confer with you electrician to determine if there is room in your panel. Additionally, you can contact Rheem's technical support at 800-432-8373. Best Regards, Steve
Question: Specs say #8 wire... i have #10 wire already installed. bathroom sink will never run for more then a minute or 2. will #10 wire be ok
Answer: I am an Electrician. #10 copper is only rated for 30 amps. No matter how long you plan to run the sink for, it is not advised to use undersized wire, as it is a life and safety hazard.

Rheem RTG-70DVLN-1 Tankless Water Heater, Grey

Rheem

Based on 12 reviews Check latest price

Product description

Rheem RTG-70DVLN-1 is a mid-efficiency indoor natural gas tankless water heater designed for continuous hot water. Industry leading low flow activation with a minimum flow rate of .26GPM and minimum activation flow rate of .40GPM ensures hot water is received even in low demand situations. Ultra Low NOx burner meets SCAQMD rule requirements of safety with low emissions. While our exclusive Guardian Overheat Film Wrap prevents our units from reaching the dangerous temperatures others can. Add in our maintenance notification settings, self-diagnostic system and EcoNet enabled mobile app feature (additional kit available), buying the Rheem RTG tankless water heater makes perfect sense. Included are a digital remote control and 10ft. of thermostat wire. Best if used with up to 3 bathrooms; .81-.82UEF (.82EF Canada), 160,000BTU efficiency. Professional installation is required otherwise warranty void. Warranty: 12yr heat exchanger, 5 yr parts and 1 yr labor.

  • Exclusive Water Savings technology conserving up to 1, 100 gallons per year
  • 160, 000 BTU (gas consumed per hour)
  • Exclusive Hot Start Programming minimizes cold water burst by staying in ready-fire state
  • Recirculation pump ready kit ready
  • For use indoor only

User questions & answers

Question: is this propane
Answer: The N in the model notates this unit using natural gas. The propane version is as follows RTG-70DVLP-1.
Question: will a 4 inch vent pipe work...will a 1/2" gas feed pipe work
Answer: A 3"/5" concentric vent is needed. 1/2" will suffice if close to supply of has.

Rinnai V65EP RV65eP, Large, Propane

Rinnai

Based on 599 reviews Check latest price

Product description

V65eP is the perfect combination of high efficiency, comfort and value in a propane gas tankless water heater from Rinnai. Ideal for small to medium homes or remodels, compact, easy-to-install, reliable and perfect for outdoor locations; Rinnai products provide peace of mind with warranties that surpass the competition.

From the Manufacturer

Rinnai's V65E exterior-mount tankless water heater efficiently delivers up to 6.6-Gallon per minute (GPM) of hot water, making it perfect for your one to two and half bathroom home. This easy-to-install, ultra-compact unit lets you enjoy all the benefits of Rinnai tankless water heating. You'll experience clean, reliable hot water at a consistent pre-set temperature, while saving energy and precious floor space in your home.

  • Endless hot water for your entire home
  • V65eP HE High Efficiency Tankless Hot Water Heater - Propane: Outdoor Installation Only
  • Up to 6.5 GPM hot water flow rate (varies by groundwater temp)
  • Control-R 2.0 mobile app features timers and schedules throughout the day and allows you to remotely put the system into vacation mode.
  • Residential Factory Warranty - 120 months (heat exchanger), 12 months (labor), 60 months (parts)

User questions & answers

Question: Can the temperature output be adjusted to 105F
Answer: Most rinnai tankless weather it is out door or indoor, have a control board to adjust temp and either on or off
Question: Can I use the Rinnai V65EP in Denver, Co? Temperatures during the winter can get below zero
Answer: It can definately be out doors in freezing temps, tho power failure arent good for it while in a freeze, tho keep in mind it will use alot more energy for frost protection, indoor units are safer amd more efficient in this case
Question: Does this unit come with controller? rinnai tech said i needed a mc-91-2us controller? do i need to buy separate
Answer: I bought model V65EN. It came with a wired digital controller. The installer did not run the wire into the house and mount the controller indoors. He simply set the controller at 120 degrees and left the controller inside the unit. If I want to change the temp, I have to take the cover of the unit.
Question: What does the "Low NOx Mean
Answer: Good place to check for info like this is Wikipedia. Here is what they say: Energy efficiencieseditMore tangible cost savings are defined when comparing the energy efficiencies of gas heaters with low NOx emissions with conventional flued types. Gas heaters with emission problems are flued and inherently lose substantial energies in the form of hot flue gases to the atmosphere. In addition, the choice of placement of flued heaters is greatly impaired due to flue installation restrictions.In contrast, dedicated low emission gas heaters do not require a flue system. Furthermore, with the introduction of oxygen depletion sensors and thermostatic controls, they do not place critical reliance on ventilation as previously was the case. These heaters can be positioned more conveniently and centralised to affect optimum warm air distribution. By definition unflued low NOx gas heaters are 100% efficient as all heat energy released from the flame is converted to useful heat.Hope this helps. June

Product features

Endless Hot Water

Put an end to scheduling your hot water need.

  • Never again choose between taking a piping hot shower, doing a load of laundry or running the dishwasher. A Rinnai Tankless Water Heater will never run out of hot water and leave you in the cold.

Hot Water On-Demand

Don't waste while you wait.

  • Rinnai tankless water heaters with ThermaCirc360 technology recirculates hot water through your pipes to get you hot water fast.
  • While you wait for hot water to travel from your old tank to your shower, you can waste the equivalent of twenty-four 16-ounce bottles of water every time. ─ that means an average of 8,700 bottles of water per person, per year.

Save Valuable Space

Your hot water heater doesn't have to be a behemoth!

  • Compact design allows for installation in non-traditional spaces such as the attic, crawl space or even a closet.
  • Save 16 sq. foot of space ─ the Rinnai tankless water heater is only the size of a small suitcase.

Affordable, Efficient Savings

Efficiency packaged in a compact design means cut CO2 emissions (as compared to tanks), use less energy and conserve water.

  • Use 40% less energy than traditional tanks* because you heat water only when you need it.

100 years of Confidence

Get peace of mind with the unsurpassed quality and innovation of a Rinnai tankless water heater.

  • Trust the #1 selling gas tankless water heating brand in North America for all of your water heating needs.
  • Smart technological advancements such as WiFi monitoring, your trusted Rinnai service provider can monitor the efficiency of your tankless water heater and address issues before you ever experience a break in service.

Sustainable Reliability

It's a smart investment for now and the future when you intertwine sustainability and reliability.

  • Every part of a Rinnai Tankless water heater is replicable so components can be easily swapped vs. buying a whole new system.
  • Average life expectancy is 20 years vs. 8-10 for a traditional tank**
  • With this premium product, you'll save–both money and worry–in the long run.

Rheem RTGH-95DVLN-2 Tankless Water Heater, Grey

Rheem

Based on 6 reviews Check latest price

Product description

Rheem Prestige® RTGH-95DVLN-2 is a high efficiency condensing indoor natural gas tankless water heater designed for continuous hot water. Industry leading low flow activation with a minimum flow rate of .26GPM and minimum activation flow rate of .40GPM ensures hot water is received even in low demand situations. Ultra Low NOx burner meets SCAQMD rule requirements of safety with low emissions. While our exclusive Guardian Overheat Film Wrap prevents our units from reaching the dangerous temperatures others can. Add in our maintenance notification settings, self-diagnostic system and EcoNet enabled mobile app feature (additional kit available), buying the Rheem Prestige tankless water heater makes perfect sense. New 2” venting with band connections allow up to 150’ with a 3” PVC or 60’ with a 2” PVC pipe. Included are also a built-in condensate neutralizer, digital remote control and 10ft. of thermostat wire. Can be used with up to 5 bathrooms depending on inlet temperature; .93UEF (.96EF Canada), 199,000BTU efficiency. Professional installation is required otherwise warranty void. Warranty: 12yr heat exchanger, 5 yr parts and 1 yr labor.

  • Exclusive Water Savings technology conserving up to 1, 100 gallons per year
  • 199, 900 BTU (gas consumed per hour)
  • Exclusive Hot Start Programming minimizes cold water burst by staying in ready-fire state
  • Recirculation pump ready kit ready
  • For use indoor only

User questions & answers

Question: Whats the difference between this and the rtgh-95dveln
Answer: I think the devln has wifi capabilities.
Question: Can I run 2 units in tandem and will the controller talk to each other
Answer: Hello- Yes. You can connect 2 alike units using an RTG20040 EZ Link cable. Thanks :) Ben
Question: Is the thermostat included
Answer: Yes, a thermostat is included.
Question: Whats the between this and the difference rtgh-95dvln
Answer: Hello- The main difference was an upgraded fan, which in turn, allowed them to downsize the vent ports from 3" down to 2". So both of the connections on top for intake air/exhaust are now ran in 2" For more info, please call Rheem at 800-432-8373 Thanks Ben

Ecosmart ECO 36 36kw 240V Electric Tankless Water Heater

Based on 313 reviews Check latest price

Product description

Eco Smart ECO 36 Electric Tankless Water Heater, 36 KW at 240 Volts with Patented Self Modulating Technology Why Eco Smart? If you have a need for a high amount of hot water then the ECO 36 is the right choice. The ECO 36 is the largest electric tankless water heater available with our patented self-modulating technology. This smart technology tankless water heater is ideal for the northern United States, where incoming water temperatures can reach as low as 37 degrees F. The ECO 36 is capable of heating nearly 3.5 gallons per minute at this low temperature. To put that into perspective, it can handle up to two showers running at the same time and never run out of hot water. For homes in the southern United States, the ECO 36 is perfect for large Roman-style and Jacuzzi tubs or high demand of hot water between multiple applications. It can handle up to 6 gallons per minute, which means you can run four showers and a sink simultaneously and never run out of hot water. A digital temperature control allows you to set your temperature in increments of 1 degree, so you can set the temperature to how you like it. The ECO 36 is the most powerful model from our full line of tankless water heaters, with the capacity to handle a large single-family home.Take a look at our full line of tankless water heaters below to see what's perfect for you. THIS MODEL REQUIRES 150 AMPS DEDICATED!. Required Wire: 4 x 8 AWG

From the Manufacturer

Ecosmart ECO 36 Electric Tankless Water Heater, 36 KW at 240 Volts with Patented Self Modulating Technology Why EcoSmart? If you have a need for a high amount of hot water then the ECO 36 is the right choice. The ECO 36 is the largest electric tankless water heater available with our patented self modulating technology. This smart technology tankless water heater is ideal for the northern United States, where incoming water temperatures can reach as low as 37 degrees F. The ECO 36 is capable of heating nearly 3.5 gallons per minute at this low temperature. To put that into perspective, it can handle up to two showers running at the same time and never run out of hot water. For homes in the southern United States, the ECO 36 is perfect for large Roman-style and Jacuzzi tubs or high demand of hot water between multiple applications. It can handle up to 6 gallons per minute, which means you can run four showers and a sink simultaneously and never run out of hot water. A digital temperature control allows you to set your temperature in increments of 1 degree, so you can set the temperature to how you like it. The ECO 36 is the most powerful model from our full line of tankless water heaters, with the capacity to handle a large single-family home. Take a look at our full line of tankless water heaters below to see whats perfect for you. THIS MODEL REQUIRES 150 AMPS DEDICATED!

  • Sleek and compact design with digital output temperature display
  • ECOSMART tankless water heaters are 99.8-percent energy efficient
  • Manufactured in United States
  • Pipe Fittings:3/4 inch NPT
  • Required Breaker:4 x 40 A
  • 150 A

User questions & answers

Question: What model is recommended for whole house
Answer:
Question: I live in lower michigan and what model is recommended for whole house
Answer:
Question: Why are these so much less expensive than other name brand tankless heaters
Answer:
Question: Even with 200 amp. My lights flicker with the water is in use. Any one having the same issue and how was the issue resolved? Thanks
Answer:

Product features

3 Smart Steps for Endless Hot Water

Step 1: Determining your average inlet water temperature is important, this allows you to determine how well your unit will perform in your desired location. A lower inlet water temperature will require a higher kilowatt product.

Step 2: Next you will determine how many applications your unit can run simultaneously at your chosen location inlet water temperature. Tankless electric water heaters are sized for maximum simultaneous use, not maximum fixtures in your home.

Step 3: Determining specifications and electrical infrastructure is important because without the correct infrastructure your unit may not fit into your breaker panel.

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