The Best Tankless Water Heater

tankless water heater

The name ‘tankless’ is the commonly used term for an instantaneous water heater. Tankless water heaters are not new appliances. They’ve been around for many years.

Designed and equipped initially for industries where storage space was limited but huge quantities of endless hot water were needed. For the same reasons these units are also used in large multi-unit residential complexes and mid-sized businesses. Instantaneous water heaters are also used as residential pool and spa water heaters.

Over the years, the design and applications have been modified and changed, becoming much smaller. This smaller size requires less space, and able the unit to be placed closer to the point of use. This benefit of the smaller size instantaneous water heaters appeals to the broader residential retailer market.

Best Tankless Water Heater

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1. Bosch Electric Mini-Tank Water Heater

⭐ Best Overall

Bosch Electric Mini-Tank Water Heater Tronic 3000 T 2.5-Gallon (ES2.5) - Eliminate Time for Hot...
  • CONVENIENT HOT WATER HEATER: 2.5 gallon point-of-use mini-tank fits under your sink to provide hot...
  • LONG LASTING QUALITY: This electric water heater is easy to maintain and has premium glass-lined...
  • INDEPENDENT INSTALLATION: 36-37" cord plugs into a 120 volt outlet for independent installation or...
  • FAST RECOVERY RATE: Eliminates long waits for hot water at your sink, get on demand hot water at...

2. EcoSmart ECO 11 Electric Tankless Hot Water

⭐ Best Runner Up

Sale
EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating...
  • Endless On-Demand Hot Water; Consistent hot water when you need it that never runs out; Continuously...
  • Save Space; EcoSmart tankless electric water heaters are 90% smaller than traditional tank heaters;...
  • Save Energy; EcoSmart tankless electric water heaters are 99% thermal energy efficient; Only heats...
  • EcoSmart ECO 11 Sizing; 13-kilowatt tankless electric water heater ideal for providing hot water for...

3. Tankless Water Heater Electric 5.5kw 240V

⭐ Best Low Cost

Tankless Water Heater Electric 5.5kw 240V, ECOTOUCH Point-of-Use Hot Water Heater Digital...
  • 【INSTANT & SUFFICIENT HOT WATER】Applied with 5.5KW heating system, the electric water heater...
  • 【SMART SELF ADJUSTMENT】The hot water heater adjusts power input based on flow rate and temp...
  • 【CONVENIENT USE】The tankless water heater comes with digital display & touch control panel so...
  • 【SAFE and DURABLE】Applied with multiple protection devices, every piece goes through strict...

4. Ecosmart ECO 18 Electric Tankless Water Heater

⭐ Best Rolling Towel Storage

Sale
ecosmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating...
  • The product is highly durable
  • The product is easy to use
  • Manufactured in China
  • Copper and stainless components

5. Rinnai RL75IP RRL75iP, Medium, Natural Gas

⭐ Best Wall Mounted Towel Rack

Rinnai RL75IP RRL75iP, Medium, Natural Gas
  • RL75iP HE+ High Efficiency Tankless Hot Water Heater - Propane: Indoor Installation Only
  • Up to 7.5 GPM hot water flow rate (varies by groundwater temp)
  • Circ-Logic technology allows you to set recirculation patterns that coincide with your typical...
  • Residential Factory Warranty - 120 months (heat exchanger), 12 months (labor), 60 months (parts)

6. Stiebel Eltron Tankless Heater

Sale
Stiebel Eltron Tankless Heater – Tempra 36 Plus – Electric, On Demand Hot Water, Eco, White
  • On-demand, continuous and unlimited supply of hot water
  • Sleek design saves space and no venting required
  • Electronic switch activated for virtually silent operation. Phase- single 60 Hz. Voltage- 208 V....
  • Copper sheathed heating element housed in copper cylinder

7. Rheem RTE 13 Electric Tankless Water Heater

⭐ Best Rheem Tankless Water Heater

Rheem RTE 13 Electric Tankless Water Heater, 4 GPM
  • On-unit temperature control, LEDs indicate active element and standby mode
  • Standard 1/2" water connection
  • Rugged brass/copper heat exchanger
  • Modulating power. Specifications:Great for single shower applications, 240 Volts - 13KW, 4.0 GPM...

8. Rinnai V65iP Propane Tankless Hot Water Heater

⭐ Best Propane Tankless Water Heater

Rinnai V65iP Propane Tankless Hot Water Heater, 6.5 GPM, Indoor Installation
  • Energy and Space Efficient: Space-saving design conserves energy as it heats only when necessary
  • Optimal Water Pressure: High-performance up to 6.5 GPM hot water flow rate for a powerful, constant...
  • Enhanced scale detection lessens possibility of serious, long-term damage to unit
  • Guaranteed to Last: 10-, 5-, and 1-year residential factory warranty for heat exchanger, labor, and...

9. Noritz EZTR40NG 40 gal Tank Replacement Indoor Tankless Water Heater

⭐ Best Noritz Tankless Water Heater

Noritz EZTR40NG 40 gal Tank Replacement Indoor Tankless Water Heater 6.6 GPM (Standard Vent) -...
  • Endless hot water
  • Direct replacement for existing 40 gal tank water heater
  • High Efficiency
  • Low Nox

10. RINKMO Electric Tankless Water Heater

RINKMO Electric Tankless Water Heater - 24KW 240V Instant On Demand Residential Electric Hot Water...
  • 🚿 TIPS. Please notice that the 18KW tankless water heater requires 2 x 40 AMP breakers and 2 x 8...
  • 🚿 WATER & ELECTRICITY SEPARATED MORE SAFE AND CLEAN. Heating water without directly contacting...
  • 🚿 SAVE MONEY SAVE COST. After using our RINKMO high efficient water heater, you will find your...
  • 🚿 TEMP PROTECTION & LED ALARM MORE REASSURING. RINKMO water heater will stop heating when no...

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Recap: The Best Tankless Water Heater

Expand
  • Bosch Electric Mini-Tank Water Heater
  • EcoSmart ECO 11 Electric Tankless Hot Water
  • Tankless Water Heater Electric 5.5kw 240V
  • Ecosmart ECO 18 Electric Tankless Water Heater
  • Rinnai RL75IP RRL75iP, Medium, Natural Gas
  • Stiebel Eltron Tankless Heater
  • Rheem RTE 13 Electric Tankless Water Heater
  • Rinnai V65iP Propane Tankless Hot Water Heater
  • Noritz EZTR40NG 40 gal Tank Replacement Indoor Tankless Water Heater
  • RINKMO Electric Tankless Water Heater

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