best natural gas water heater you didn’t know you needed

Frustrated with running out of hot water? The best natural gas water heater delivers endless comfort and convenience.

Introducing the **Rinnai RX199iN**, ideal for *homeowners seeking reliable, on-demand hot water*. This innovative tankless water heater provides up to 11.1 GPM, ensuring your family enjoys hot water whenever needed.

Plus, its smart technology optimizes energy use, saving you money on utility bills while being eco-friendly.

We tested durability, ease of use, and more, ensuring you get the best performance for your home.

best natural gas water heaterbest natural gas water heaterbest natural gas water heater

best natural gas water heater

Rinnai RX199iN Tankless Water Heater

#1 CHOICE

NEW Rinnai RX199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 11.1 GPM, 199,000 BTU

Rinnai RX199iN Condensing Smart Sense Tankless Water Heater: 11.1 GPM, propane or natural gas, 199,000 BTU, compact design.

Benefits

  • Provides hot water on demand, servicing up to 7 fixtures simultaneously.

Drawbacks

  • Professional installation required, which may add to overall costs.

The Rinnai RX199iN is a powerful and efficient water heater that fits seamlessly into both indoor and outdoor environments. Its compact size, comparable to a small suitcase, makes it an ideal choice for homeowners with limited space. With a capacity of up to 11.1 GPM, it ensures you never run out of hot water, even during peak usage times.

This model boasts a high energy efficiency factor of UEF .98, making it a smart choice for those looking to reduce energy costs. The Smart Sense gas control system allows for easy operation, and the Quick Flush feature simplifies maintenance. However, it is important to note that professional installation is recommended, which may deter some users due to the additional expense.

Overall, the Rinnai RX199iN is a practical pick for small spaces and those seeking a reliable, high-capacity water heating solution.

To buy this product, click here.

Natural Gas Tankless Water Heater 14L

#2 CHOICE

Natural Gas Tankless Water Heater, 14L Instant Hot Water Heater with Fahrenheit Digital Display, Indoor Installation Up to 3.7GPM, 95540BTU

Natural Gas Tankless Water Heater: 14L instant hot water heater, industrial-grade metal housing, 2-year warranty.

Benefits

  • Delivers 14L/min (3.7GPM) flow rate, ideal for multiple fixtures.

Drawbacks

  • Professional installation required for safe operation.

This tankless water heater offers instant hot water on-demand, eliminating the need for preheating. With a powerful 95,540BTU output, it provides hot water within seconds, making it perfect for indoor showers, kitchen tasks, and more. The dual-unit digital display allows users to easily switch between Fahrenheit and Celsius, ensuring precise temperature control. The automatic overheat warning at 125°F enhances safety, especially in homes with children.

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Constructed from high-quality materials, including a rust-resistant heat exchanger and UL-certified vent pipe, this unit is built to last. Its tankless design minimizes limescale buildup, ensuring long-term performance. However, it is essential to note that professional installation is necessary due to the complexities involved in gas piping and venting. Improper setup could lead to serious risks, including gas leaks and carbon monoxide poisoning.

A practical pick for small spaces, this water heater efficiently meets hot water demands without the bulk of traditional storage heaters. Its compact design makes it suitable for various indoor settings, while its safety features provide peace of mind for users.

To buy this product, click here.

Ranein Tankless Indoor Water Heater 4.3 GPM

#3 CHOICE

Ranein Natural Gas Tankless Water Heater with Vent Pipe, Indoor Max 4.3 GPM, 100,000 BTU Instant Hot Water Heater

Ranein Natural Gas Tankless Water Heater: 12” long, ABS plastic, 2-year warranty.

Benefits

  • Provides continuous hot water with a flow rate of 4.3 GPM, sufficient for 2-3 supply points.
  • Four Seasons Function automatically adjusts water temperature based on seasonal changes.
  • Kitchen Function defaults to 100°F, ideal for kitchen use.
  • No waiting required for hot water, eliminating the 30-minute preheating time of traditional heaters.
  • Cost-effective with included exhaust pipe, reducing additional expenses.
  • Oxygen-free copper water tank minimizes heat loss, enhancing energy efficiency.

Drawbacks

  • Not recommended for installation in areas above 2,000 feet.
  • No dishwasher-safe parts for easy cleaning.

A practical pick for small spaces, the Ranein Natural Gas Tankless Water Heater is designed for efficiency and convenience. Its compact design allows it to fit seamlessly into tight areas, making it an excellent solution for apartments or smaller homes. With its impressive heating capacity and innovative features, it meets the hot water demands of modern households without the hassle of traditional systems. Ideal for users looking for reliable, on-demand hot water, this unit offers both performance and value.

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Rheem High Efficiency Outdoor Tankless Water Heater

#4 CHOICE

Rheem RTG-70XLN-3 High Efficiency Non-Condensing Outdoor Tankless Natural Gas Water Heater, 7.0 GPM, Gray

Rheem RTG-70XLN-3 High Efficiency Non-Condensing Outdoor Tankless Natural Gas Water Heater: 7.0 GPM, Gray, 19% smaller size, 22% lighter, 2-year warranty.

Benefits

  • Provides continuous hot water for your entire house, supporting multiple applications simultaneously.
  • High efficiency saves on energy costs by only operating when hot water is needed.
  • Saves up to 1,100 gallons of water per year with its water-saving setting.
  • Hot-start programming prevents cold-water bursts, ensuring comfort.

Drawbacks

  • Noisy operation during peak usage times.
  • Installation may require professional help due to gas line adjustments.

This water heater is a practical pick for homeowners seeking efficiency and convenience. Its compact design makes it an excellent choice for small spaces while providing ample hot water for daily needs.

To buy this product, click here.

Ranein 2025 Gen II Tankless Water Heater

#5 CHOICE

2025 GEN II Ranein Natural Gas Tankless Water Heater Max 3.6 GPM, 80,000 BTU Indoor On Demand Instant Hot Water Heater with LED Temperature Control Panel, Vent Pipe

2025 GEN II Ranein Natural Gas Tankless Water Heater: 12” long, ABS plastic, 2-year warranty.

Benefits

  • Max 3.6 GPM provides endless hot water for 2-3 taps simultaneously.
  • 80,000 BTU ensures rapid heating for daily household use.
  • No sudden temperature changes offer a stable experience, ideal for bathing infants.
  • Space-saving design fits perfectly in small apartments or homes.
  • One-click specialized modes simplify temperature settings for various needs.
  • Energy-efficient operation cuts down monthly utility bills.
  • Includes exhaust pipe for easy installation, saving extra costs.

Drawbacks

  • Must be installed by licensed professionals to comply with local codes.
  • No manual adjustments may limit customization for some users.

A practical pick for small spaces, the 2025 GEN II Ranein Natural Gas Tankless Water Heater provides reliable, on-demand hot water without the bulk of traditional heaters. Its efficient design and advanced technology make it a top choice for households looking to save space and energy.

To buy this product, click here.

Faq about best natural gas water heater:

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1:What is the best natural gas water heater?

The best natural gas water heater varies by needs, but popular options include the Rheem Performance Plus and the A.O. Smith Vertex for their efficiency and reliability.

2:How do I choose a natural gas water heater?

Consider factors like capacity, energy efficiency, recovery rate, and warranty. Assess your household’s hot water demand to select the right size.

3:What is the average lifespan of a natural gas water heater?

The average lifespan is about 8 to 12 years. Regular maintenance can extend its life significantly.

4:Are natural gas water heaters energy efficient?

Yes, natural gas water heaters are generally more energy-efficient than electric models, leading to lower utility bills.

5:Can I install a natural gas water heater myself?

It’s recommended to hire a professional for installation due to safety concerns and local code requirements.

6:What maintenance does a natural gas water heater need?

Regular flushing of the tank, checking the anode rod, and inspecting the venting system are essential for proper maintenance.

7:What are the signs of a failing natural gas water heater?

Signs include inconsistent water temperature, strange noises, leaks, and rusty water. Replace the unit if these issues arise.

Conclusion

Rinnai RX199iN Tankless Water Heater exemplifies cutting-edge technology, delivering unparalleled efficiency and endless hot water supply, making it an exceptional choice for modern households. Its compact design and advanced features ensure optimal performance while minimizing energy consumption.

Conversely, the Natural Gas Tankless Water Heater 14L stands out for its reliability and robust construction, offering a cost-effective solution without compromising on quality. Together, these products represent the pinnacle of innovation in water heating, catering to diverse consumer needs while promoting sustainability.