Best Tankless Water Heaters

By September 16, 2016Home

These are the top five best Tankless Water Heaters on the market, chosen from Dozens of models.

#5 –  Ecosmart Eco 27 Electric Tankless Water Heater

Price: $446.46
You save: $122.54 (22 %)
18 new from Too low to display4 used from $379.49
  • 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
  • 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, (3) 40 required breakers, 112.5 maximum power (AMP), (3) 8 required wire.
  • Required Breaker Quantity: Three 40 Amp Double Pole
  • Recommended Electrical Panel: 200 Amps
  • NEVER run out of hot water with an ECOSMART tankless water heater.
  • Save up to 12 cubic feet of storage space.
  • Digital temperature control in 1-degree increments gives users complete control of hot water

The Ecosmart ECO 27 electric tankless water heater, with its compact, space-saving size, is a powerful model that ensures you will not run out of hot water even in colder climates. This product is ranked highly in tankless water heater reviews and is built for efficiency and durability with its copper and stainless components. The parts are also easy to replace, making this design a convenient addition to any household.

With its smart, self-modulating technology, this large electric tankless water heater is configured for climates with extremely low incoming water temperatures. This model works best with a high demand of hot water between multiple applications and is suited for climates in the United States. If you live in a large single-family home that is rather busy, start adjusting your energy usage on a need-basis with this great find.

#4 –  Takagi T-Kjr2-In-Ng Indoor Tankless Water Heater

Price: $489.95
You save: $10.00 (2 %)
8 new from $489.957 used from $416.46
  • 140,000 BTU
  • 6.6 GPM max flow rate
  • 4-Inch category III stainless steel venting required
  • Inlet, outlet thermistors for constant temperature monitoring
  • Energy factor of 0.81-0.83

The Takagi T-KJr2-IN-NG, with its non-condensing gas fired design and space-saving compact design, is the best tankless gas water heater on this list. This model is the smallest unit in the Takagi lineup and is perfect for light residential use, like in small apartment units. With its Energy Star certification and frustration-free guarantee, alongside its safety features, the Takagi T-KJr2-IN-NG is a useful addition to your residence.

This unit is small yet powerful and can adequately cover the hot water needs for a small American home or apartment with one or two bathrooms. The Takagi T-KJr2-IN-NG can do the same job as a water heater with a tank, and it is wall-mounted for added convenience. This domestic hot water system can support support hydronic baseboard and radiant floor heating applications, making it the perfect contribution to your household.

#3 – Stiebel Eltron Tempra 24 Plus Electric Tankless Whole House Water Heater

Price: $687.97
You save: $217.00 (24 %)
15 new from $687.978 used from $542.91
  • Digital temperature control
  • Proven reliability
  • No venting required
  • Sleek design fits anywhere
  • Save at least 15-20% on the hot water portion of your electric bill

The Stiebel Eltron Tempra 24 Plus, with its sleek design and upgraded heavy-duty electronics, is one of the best electric tankless water heaters you can get. As one of the most advanced tankless water heaters on the market today, it boasts digital temperature controls and no venting required. The Stiebel Eltron Tempra 24 Plus has been redesigned inside and out, so it is complete with the latest features and accessories to give you hot water you can depend on.

This reliable model ranks highly in electric tankless water heater reviews with its simple single flow sensor design and hinged cover for easy access. As a leader in tankless water heating technology, the innovation and quality behind this product sets it above the rest and replaces your conventional tank in an easy, convenient way. The Stiebel Eltron Tempra 24 Plus will meet all of your hot water needs, so reduce your electric bill and save energy by giving this product a try.

#2 – Rheem Rtgh-95Dvlp 9.5 Gpm Indoor Direct Vent Tankless Propane Water Heater BestValueLRG

Rheem RTGH-95DVLP 9.5 GPM Indoor Direct Vent Tankless Propane Water Heater
Price: $1,249.99
4 new from $1,249.990 used
  • 94-Percent Energy efficient with stainless-steel condensing heat exchanger
  • Intelligent electronic controls designed to increase energy efficiency and safety
  • Third party efficiency listed by AHRI
  • Up to 38-Feet of 3-Inch PVC Pipe or 5-Feet of 2-Inch PVC Pipe
  • Low Nox Version

The Rheem RTGH-95DVLP tankless water heater, with its stainless-steel condensing heat exchanger and low NOx emissions, is the best bang for your buck. This high-end, affordable product both meets and exceeds industry standards to ensure that you are investing in a high-quality tankless water heater you can rely on. With its two-pipe direct vent system, which is designed for PVC pipe, and built-in electric blower, this tankless water heater is a great find for the money.

Rheem represents the highest quality in tankless water heater manufacturing, so the RTGH-95DVLP is perfect for anyone seeking a product he or she can count on without spending a fortune. You can connect two tankless units to operate as one through a link cable with this convenient design, and this model also works well in elevation up to 8,400 ft. above sea level. Find your ideal propane tankless water heater with the Rheem RTGH-95DVLP and start saving money today.

#1 – Rinnai Ruc98In Ultra Series Natural Gas Tankless Water Heater 

Price: $1,499.99
13 new from $1,499.990 used
  • Concentric or PVC venting option
  • Up to 0.96 Energy Factor/Up to 0.92 Uniform Energy Factor
  • The space-saving design allows Indoor Installation type
  • Ultra low NOx emissions
  • 199,000 max BTU

The Rinnai RUC98iN Ultra Series is the best tankless hot water heater on the market today. It supplies heated water whenever you need it, and you can use this product for multiple tasks at the same time, so you never have to worry about running out of hot water during a busy day. This product allows for greater energy savings with an endless supply of hot water, so it is hands down our top pick for best tankless water heater.

This top-rated tankless water heater comes with two heat exhangers to maximize heating value and deliver more energy efficiency. You can have comfort and convenience while saving money with this reliable, durable design, whose innovative technology reduces the need for maintenance. Enjoy the ENERGY STAR® certification and venting flexibility that make this tankless water heater a top-of-the-line product for your needs.

Tankless Water Heater Reviews & Comparisons

TANKLESS WATER HEATERS TopPickLRG BestValueLRG white image white image white image
MODELS  Rinnai Ruc98In Ultra Series Natural Gas Tankless Water Heater  Rheem Rtgh-95Dvlp 9.5 Gpm Indoor Direct Vent Tankless Propane Water Heater  Stiebel Eltron Tempra 24 Plus Electric Tankless Whole House Water Heater  Takagi T-Kjr2-In-Ng Indoor Tankless Water Heater  Ecosmart Eco 27 Electric Tankless Water Heater






X-FACTOR Flexible Installation High-Altitude Capability Tempra Advanced Flow Control™ Safety Controls Configured For Different Climates
9.8 Gpm 9.5 Gpm 5.4 Gpm 6.6 Gpm 6.0 Gpm
PRICE 1267.65 1085.5 698 533.99 477.58
199,000 Btus 199,000 Btus 82,000 Btus 140,000 Btus 92,000 Btus
Natural Gas Or Propane Propane Electric Natural Gas Electric
VENTING Concentric Or Dual-Pipe Pvc/Cpvc Two-Pipe Pvc Direct None 4-Inch Category Iii Stainless Steel None
TECHNOLOGY Condensing Technology Intelligent Electronic Controls Upgraded Heavy-Duty Electronics Inlet And Outlet Thermistors Patented Self-Modulating Technology
SIZE (DEPTH X WIDTH X HEIGHT) 10 X 18.5 X 26 Inches 9.8 X 18.5 X 27.5 Inches 8.8 X 19.5 X 21.5 Inches 6.7 X 13.8 X 20.3 X Inches 3.8 X 17 X 17 Inches
0.960 Ef 0.940 Ef .990 Ef 0.820 Ef 0.998 Ef
WARRANTY LENGTH 12-Year Warranty Limited Warranty 7-Year Limited Warranty 10-Year Warranty Lifetime Warranty
AMAZON PRIME? YesMark YesMark YesMark YesMark YesMark
LEARN MORE Read Full Review Read Full Review Read Full Review Read Full Review Read Full Review


Tankless Water Heaters Buyer’s Guide

There’s a lot of technical terms being thrown around in these reviews, so it may benefit you to brush up on some of the features to look for when purchasing the best tankless water heater for your needs. Here’s a quick breakdown of some terms you’ll often see and how they relate to your best tankless water heater experience.

Energy Factor Rating: The higher the EF, the more energy efficient the unit is, so look for EF ratings as close to 1 as possible.

Flow Rate: The flow rate is the gallons-per-minute rating that lets you know how much hot water the heater can deliver over a set period of time.

Inlet Temperature: The inlet temperature is important to consider when choosing a tankless water heater, as the temperature of incoming water temperature will vary by region and season. A water heater in the North, for example, will require a higher BTU input to heat and provide water with a certain temperature than one in the South, so make sure to take this fact into account when choosing your tankless water heater.

Keep these terms in mind when comparing prices and features to find the Best Tankless Water Heater!

Top 5 Best Tankless Water Heaters

Ranking Tankless Water Heater Best Feature
#1 Rinnai Ruc98In Ultra Series Natural Gas Tankless Water Heater Flexible Installation
#2 Rheem Rtgh-95Dvlp 9.5 Gpm Indoor Direct Vent Tankless Propane Water Heater High-Altitude Capability
#3 Stiebel Eltron Tempra 24 Plus Electric Tankless Whole House Water Heater Tempra Advanced Flow Control™
#4 Takagi T-Kjr2-In-Ng Indoor Tankless Water Heater Safety Controls
#5 Ecosmart Eco 27 Electric Tankless Water Heater Configured For Different Climates

Sarita F.

About Sarita F.

Sarita F. grew up in a well-decorated house and was taught about interior design at a young age. After finishing college and struggling in the marketing world, she decided to become a freelancer who focused on home and fitness products.