The 10 Best Tankless Water Heaters For Maximum Energy Efficiency
The 10 Best Tankless Water Heaters For Maximum Energy Efficiency

Whatever you do today at home should be somehow related to energy efficiency. From the lights, to household appliances and water heaters, it is all about saving energy to help the environment. As we know, there are already energy-saving light bulbs, most of the modern appliances have the Energy Star rating and now it is time to install more productive water heaters. If you have been using an ordinary electric water heater and you see it is counting its last days, think about a tankless heater. – Lillian Connors –  On-Demand Water Heaters: Energy Efficiency at Its Best.

Here are the best tankless Water heater ,you can start with to start saving energy. Make sure to Choose the one that fits your needs the most.

 

1- Rheem

Rheem RTG-64XLN 6.4 GPM Low NOx Outdoor Tankless Natural Gas Water heater (Tools & Home Improvement)


Rheem RTG-64XLN Outdoor Natural Gas Tankless Water Heater Residential Tankless Water Heaters – Rheem tankless gas water heaters offer you the perfect solution to heat your water at home. Imagine never running out of hot water again. Rheem provides to you innovative, new tankless products that provide a continuous supply of hot water from energy efficient and space saving design units. Specifications – 6.8 gal./min. at 35A-Degree F rise max. – 5.3 gal./min. at 45A-Degree F rise : – Outdoor Installation Only. – New. Next Generation Burner Technology – Industry Best. .26 GPM Minimum Flow Rate.
List Price: $649.99 USD
New From: $649.99 USD In Stock
Used from: Out of Stock


Rheem RTE 13 Electric Tankless Water Heater, 4 GPM (Tools & Home Improvement)


Ideal for Point-of-Use Applications Continuous Hot Water on Demand Energy Efficient Compact Design – Fits Almost Anywhere On-Unit Temperature Control LEDs Indicate Active Element and Standby Mode Standard 1/2″ Water Connection Rugged Brass/Copper Heat Exchanger Applications Homes Apartments Condos Hospitals Hotels Boats Restaurants Offices Laboratories …anywhere hot water is needed! Model: RTE 13 Length: 10 Width: 7-1/4 Weight: 8 ELECTRICAL SPECIFICATIONS KW: 13 VOLTS; REQ.Breaker: 60 Double Pull; MAX POWER(AMP): 54 AWG WIRE: 6 Minimum Activation Flow rate(GPM): 0.4 Maximum Flow Rate(GPM): 4
List Price: $329.99 USD
New From: $329.99 USD In Stock
Used from: Out of Stock

Rheem RTE 9 Electric Tankless Water Heater, 3 GPM (Tools & Home Improvement)


Rheem RTE 9 Electric Tankless 3 GPM Water HeaterRheem RTE 9 Electric Tankless 3 GPM Water Heater Features: On-unit temperature control LEDs indicate active element and standby mode Standard 1/2″ water connection Rugged brass/copper heat exchanger Modulating power
List Price: Price Not Listed
New From: 0 Out of Stock
Used from: Out of Stock

2- ECO

Ecosmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology (Tools & Home Improvement)


This Smart Technology electric tankless water heater is configured as a “whole home” model for climates where incoming water temperature is 62°F and above. The ECO 18 is capable of heating over 2.5 gallons per minute, which is the equivalent of one water saver shower head (with a 1.5 gpm flow) and one sink with a low inlet water temperature of 62°F, and an output setting of 105° F. Two showers emitting no more than 1.5 gpm each can be run simultaneously when incoming water temperature is above 70° F. Digital temperature control allows you to set your temperature in increments of 1°. 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. However, when sized properly it 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 18 requires a minimum 150 amp electrical panel for installation with (2) 40 amp double pole breakers connected to (2) sets of #8 awg wire. Plumbing connections are 3/4″ NPT. For additional assistance please feel free to contact our support center at 877-474-6473.
List Price: Price Not Listed
New From: $425.00 USD In Stock
Used from: $329.26 USD In Stock

EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology (Tools & Home Improvement)


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 (1) 60 amp double pole breaker connected to (1) 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.

List Price: Price Not Listed
New From: $232.75 USD In Stock
Used from: $178.86 USD In Stock

EcoSmart ECO 27 Electric Tankless Water Heater, 27 KW at 240 Volts, 112.5 Amps with Patented Self Modulating Technology (Tools & Home Improvement)


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 (3) 9 KW standard Emerson electric heating elements with brass tops to prevent electrolysis. Copper heat exchanger. Automatic resettable thermostat. (3) 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.
List Price: Price Not Listed
New From: $459.89 USD In Stock
Used from: $369.74 USD In Stock

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4-

Takagi T-KJr2-IN-NG Indoor Tankless Water Heater, Natural Gas (Tools & Home Improvement)


T-KJR2-INNG Features: -Tankless water heater.-Natural Gas.-Can be converted into a direct-vent unit.-Indoor installation only.-BTU/hr: 19,500 140,000.-0.82 Energy factor.-Flow rate: 6.6 GPM maximum.-Cost-efficient and environmental friendly.-Perfect for light residential and radiant heating applications.-Energy star. Dimensions: -Overall dimensions: 20.3″ H x 13.8″ W x 6.7″ D.
List Price: $499.95 USD
New From: $489.95 USD In Stock
Used from: $452.99 USD In Stock

5-

Rinnai RUC98iN Ultra Series Natural Gas Tankless Water Heater, Concentric/Twin Pipe Installation (Tools & Home Improvement)


Rinnai takes tankless water heating one step further with condensing technology that delivers more efficiency than ever before. Enjoy all the same tankless benefits you’ve come to expect from Rinnai, plus even greater energy savings. Features: 95% Thermal Efficiency Natural gas or propane Indoor Installation Only 98° F to 140° F Residential Temperature Range 98° F to 185° F Commercial Temperature Range Commercial Controller Must be Purchased Separately Gas Rate Input BTU’s: 15,200 – 199,000 Electronic Ignition Meets California and Texas NOx Emissions Standards Compatible with Full Line of Rinnai Digital Controllers 12-Year Warranty on Heat Exchanger, 5 Year Parts, 1 Year Labor for Residential Installations Specifications: Width: 18.5″ Height: 26″ Depth: 10″ Weight: 61.7 lbs Gas Connection: 3/4″ Water Connection: 3/4″
List Price: $1,540.50 USD
New From: $1,540.50 USD In Stock
Used from: Out of Stock

6-

Takagi T-KJr2-IN-LP Indoor Tankless Water Heater, Propane (Tools & Home Improvement)


The T-KJr2 model is the smallest unit in the Takagi line-up. The T-KJr2 is perfect for light residential (i.e. small apartment units) and radiant heating applications.
List Price: $511.76 USD
New From: $501.52 USD In Stock
Used from: $426.29 USD In Stock

7-

Marey Power Gas 10L 2.7 GPM Propane Gas Digital Panel Tankless Water Heater (Tools & Home Improvement)


Marey Power Gas 10L Digital Panel Tankless Water Heater delivers endless hot water with optimal energy efficiency! No electricity required! The Marey Power Gas 10L Digital Panel Tankless Water Heater is simple to install and includes auto ignition. Energy-saving design heats up in seconds and uses gas only while water is flowing. Available in LP and natural gas models. Things are heating up: Adjustable gas and water control knobs. Digital panel shows out coming water temperature.; Electric pulse ignition (2 D-cell batteries required; not included); Activates by water flow when faucet is turned on; Rust-proof… no water loss due to leaks; Anti-combustion and gas pressure safety protection; Works easily with low levels of water pressure; Applicable water pressure: 3.6 – 145.0 PSI; Hot water output per minute: 3.1 gallons per minute; Energy efficiency: 54% – 87%; Exhaust discharge mode: Flue duct type; Measures approx. 24″ x 14″ x 7″. Weighs approx. 21 lbs. State Model. Advanced technology saves water and energy! Order Today! Marey Power Gas 10L Digital Panel Tankless Water Heater
List Price: $239.99 USD
New From: $210.30 USD In Stock
Used from: $148.30 USD In Stock

8-

Stiebel Eltron Tempra Plus 24 kW, tankless electric water heater with Self-Modulating Power Technology & Advanced Flow Control (Tools & Home Improvement)


Stiebel Eltron Tempra 24 Plus Electric Tankless Water Heater, 208/240 Volts The Tempra Plus is the most technologically advanced tankless water heater available on the market today. The Tempra series has been redesigned completely inside and out – upgraded heavy-duty electronics, a simple single flow sensor design, a hinged cover for easy access, and Advanced Flow Control for the Tempra Plus. Welcome to the next generation of German quality. The Stiebel Eltron Tempra 24 Plus Electric Tankless Water Heater is designed to replace a conventional tank with no inconvenience to the users hot water needs. The water heater reduces the eletric bill and saves energy on average of 15%-20% kWH compared to a conventional tank water heater. With the dial at the users fingertips the hot water temperature can be adjusted at anytime, and the unit takes up much less space than a tank water heater. The Tempra has several advantages over a gas-type tankless water heater. Compared to many similar gas tankless models the Tempra is less expensive to purchase. Installation is also much simpler and cheaper since it is not necessary to vent a Tempra to the outside. Stiebel Eltron Tempra 24 Plus Electric Tankless Water Heater, 208/240 Volts Specifications: Voltage: 240 Wattage: 24 Amperage: 2×50 Min. required circuit breaker size: double pole 2×60 Recommended wire size: 2 x 6 Maximum temp. increase: 92 Weight: 15.4 Width: 16 5/8 Height: 14 1/2 Depth: 4 5/8 Working pressure: 150 PSI
List Price: Price Not Listed
New From: $698.00 USD In Stock
Used from: $474.17 USD In Stock

9-

Chronomite M-20L/120 HTR 104F 120-Volt 20-Amp Instant-Flow Micro Low Flow Tankless Water Heater, 104-Degree Preset (Tools & Home Improvement)


Chronomite was the first to patent a microprocessor technology which allows for a pre-set or controlled output temperature that delivers unlimited hot water without risk of scalding-in two seconds as opposed to the six seconds offered by other tankless water heaters. Chronomite is installed at point of use and is only operational when hot water is requested, thus dramatically reducing hot water delivery time and inefficient use of electricity.
List Price: $290.12 USD
New From: $278.48 USD In Stock
Used from: Out of Stock

10-

Atmor 8.5kw/240v Point-Of-Use Tankless Electric Instant Water Heater Including Pressure Relief Device, AT-900-08 (Tools & Home Improvement)


SAVE ENERGY, WATER, MONEY, TIME – Atmor offers the efficient and convenient water heating solution you have been looking for. Atmor 8.5kW/ 240V Point-of-Use Tankless Electric Instant Water Heater provides an unlimited flow of hot water without the wait or worry of ever running out. That’s right, instant hot water on demand! Rest your mind at ease and enjoy the continuous flow of hot water whenever you want. This unit is specifically designed for a single/double sink. The 8.5kw/240v unit can be used for a single shower in areas with ground water temp 67° and higher. Recommended flow rate of 1.23 gallons per minute (GPM) is recommended for optimal performance (when used for a single shower, a water saver shower head required for optimal performance). Perfect for residential and commercial use, this compact unit can be installed against the wall either under the sink out of sight or near the point of use. Unit requires a 40 Amp dedicated single-phase, double pole breaker. Required wire size: 6 AWG. Standard 1/2″ NPT (straight thread) fittings. Flow rate of 1.23 GPM = 45° temperature rise. NOTE: Can only be used for a single shower in areas with ground water temps 67° or higher. Unit can be used for single/double sinks nationwide. For safety reasons, the included Pressure Relief Device (PRD) included must be installed on your water heater per the instructions in the owner’s manual. Failure to comply with the installation and operating instructions in our Owners Manual or improper use will void the warranty. For assistance prior to purchasing this unit, please call 1-888-783-6082 or e-mail atmor@paragongroupusa.com. The water heater must be installed by a licensed electrician in compliance with all local and building regulations.
List Price: $139.99 USD
New From: $104.99 USD In Stock
Used from: Out of Stock
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