10 Best Gas Tankless Water Heaters 2020

Gareth Otwell Reviewed by Gareth Otwell | Last Updated:

After analyzing products, scanning reviews, spending more than 36 hours of research and speaking with our test users, we think the Rinnai V65IN Tankless Water Heater is the one of the Best Gas Tankless Water Heater on the market.

# Image Name Brand Price
1
⭐Best Choice
Rinnai V65IN Tankless Water Heater
Rinnai V65IN Tankless Water Heater, Large, V65iN-Natural Gas/6.5 GPM Check price Rinnai $$$$$ Check price
2
Best under $1000
Rheem RTG-84XLN-1 Tankless Water Heater
Rheem RTG-84XLN-1 Tankless Water Heater, Grey Check price Rheem $$$$$ Check price
3 Rinnai V Series HE Tankless Hot Water Heater: Outdoor Installation Rinnai V Series HE Tankless Hot Water Heater: Outdoor Installation Check price Rinnai $$$$$ Check price
4
💲Best value for the money
EcoSmart ECO 27 Electric Tankless Water Heater
EcoSmart ECO 27 Electric Tankless Water Heater, 27 KW at 240 Volts, 112.5 Amps with Patented Self Modulating Technology Check price Ecosmart $$$$$ Check price
5 Rheem 240V 2 Heating Chambers RTEX-18 Residential Tankless Water Heater Rheem 240V 2 Heating Chambers RTEX-18 Residential Tankless Water Heater, small, GREY Check price Rheem $$$$$ Check price
6
👑Premium Pick
Rinnai RU Series Sensei SE+ Tankless Hot Water Heater: Indoor
Rinnai RU Series Sensei SE+ Tankless Hot Water Heater: Indoor Installation Check price Rinnai $$$$$ Check price
7
Best under $500
Eccotemp i12-NG Tankless Water Heater
Eccotemp i12-NG Tankless Water Heater Check price Eccotemp $$$$$ Check price
8 Marey GA10LP Power 10L 3.1 GPM Propane Gas Tankless Water Marey GA10LP Power 10L 3.1 GPM Propane Gas Tankless Water Heater, Liquid, White Check price MAREY $$$$$ Check price
9
Best under $200
EcoSmart ECO 11 Electric Tankless Water Heater
EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology Check price Ecosmart $$$$$ Check price
10 Excel VentFree Tankless Gas Water Heater PROPANE GAS Excel VentFree Tankless Gas Water Heater PROPANE GAS - Exclusive Low Water Pressure Startup tecnology 1.6 GPM PURE COPPER HEAT EXCHANGER Check price Excel $$$$$ Check price

Rinnai V65IN Tankless Water Heater – Best Overall Gas Tankless Water Heater

Rinnai V65IN Tankless Water Heater
  • Endless hot water for your entire home
  • V65iN HE High Efficiency Tankless Hot Water Heater - Natural Gas: Indoor 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)

Rheem RTG-84XLN-1 Tankless Water Heater – Best under $1000

Rheem RTG-84XLN-1 Tankless Water Heater
  • Exclusive Water Savings technology conserving up to 1, 100 gallons per year
  • 157, 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 outdoors with freeze protection up to -30 degrees
  • Fuel Type: Natural Gas

Rinnai V Series HE Tankless Hot Water Heater: Outdoor Installation

Rinnai V Series HE Tankless Hot Water Heater: Outdoor Installation
  • Endless hot water for your entire home
  • V65eN HE High Efficiency Tankless Hot Water Heater - Natural Gas: 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)

EcoSmart ECO 27 Electric Tankless Water Heater – Best Budget Gas Tankless Water Heater

EcoSmart ECO 27 Electric Tankless Water Heater
  • 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, (3) 40 required breakers, 112.5 maximum power (AMP), (3) 8 required wire.Amperage Draw:113 A
  • 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

Rheem 240V 2 Heating Chambers RTEX-18 Residential Tankless Water Heater

Rheem 240V 2 Heating Chambers RTEX-18 Residential Tankless Water Heater
  • 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

Rinnai RU Series Sensei SE+ Tankless Hot Water Heater: Indoor – Premium Pick

Rinnai RU Series Sensei SE+ Tankless Hot Water Heater: Indoor
  • Endless hot water for your entire home
  • RU199in Sensei SE+ Super High Efficiency Tankless Hot Water Heater - Natural Gas: Indoor Installation Only
  • Up to 11 GPM hot water flow rate (varies by groundwater temp)
  • Circ-Logic technology allows you to set recirculation patterns that coincide with your typical habits. Hot water is available when you need it!
  • Residential Factory Warranty - 120 months (heat exchanger), 12 months (labor), 60 months (parts)

Eccotemp i12-NG Tankless Water Heater – Best under $500

Eccotemp i12-NG Tankless Water Heater
  • Whole home indoor, gas powered tankless water heater, rated at 3 GPM that activates only on demand and no pilot light needed, reducing energy consumption
  • Sleek, modern design with black tempered glass front panel featuring an easy to use LED display controls
  • Features fully automatic temperature controls with an energy saving mode and child lock technology
  • Safe electronic ignition system; Plugs into standard 110v electrical outlet with UL-listed cord. Field tested to 5500 ft. elevation (not recommended to be used any higher)
  • Uses standard 1/2" NPT water fittings and comes with horizontal venting allowing for a convenient and quick installation

Marey GA10LP Power 10L 3.1 GPM Propane Gas Tankless Water

Marey GA10LP Power 10L 3.1 GPM Propane Gas Tankless Water
  • Provide endless hot water on demand and only as needed
  • Save up to 60% on electricity bills for water heating
  • Compact design saves space and is easy to install almost anywhere
  • No electrical connection is required so it's perfect alternative for those homes experiencing frequent power outages
  • Unlimited hot water whenever is needed
  • 5-year
  • Allows water temperature to be controlled
  • Rustproof, no water loss due to leaks
  • Works easily with low levels of water pressure

EcoSmart ECO 11 Electric Tankless Water Heater – Best under $200

EcoSmart ECO 11 Electric Tankless Water Heater
  • 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

Excel VentFree Tankless Gas Water Heater PROPANE GAS

Excel VentFree Tankless Gas Water Heater PROPANE GAS
  • PROPANE GAS
  • LIFETIME WARRANTY on Pure Copper Heat Exchanger
  • Exclusive - Vent-Free Technology No expensive Flue required
  • Compact size: front 11.5" - depth 6" - height 16"
  • Unique and beautiful design

Similiar Categories