Rheem vs. Rinnai: Which 26L Continuous Flow Hot Water System is the Best?

When choosing a continuous flow gas hot water system, two names stand out: Rheem and Rinnai. Both brands have a long history of delivering reliable, energy-efficient hot water solutions, but when it comes to performance, durability, and long-term value, Rinnai has the edge.

In this head-to-head comparison, we’ll break down the Rheem Metro 26, Rinnai Infinity 26, Rinnai B26, and Dux 26 to determine which system is the best choice for your home.

Capacity & Performance – What Do You Get?

All four systems deliver 26 litres per minute, meaning they are suitable for medium to large households. However, capacity isn’t everything—factors like build quality, efficiency, and installation compatibility make all the difference.

💡 The Verdict:

• All models provide 26L/min, but Rinnai’s Infinity 26 has superior heating efficiency and faster heat recovery, ensuring consistent hot water even during high demand.

Installation & Retrofit Compatibility

Rinnai B26 takes the lead in installation flexibility as it fits more recess boxes than the Rheem Metro 26 or Dux 26. This makes it a hassle-free upgrade for homes replacing an older system.

💡 The Verdict:

• Rinnai B26 wins for easiest installation, making it ideal for quick replacements and tight spaces.

Durability & Build Quality – Long-Term Performance Matters

If you’re after a system that lasts, Rinnai is the clear winner. The Rinnai Infinity 26 is built with premium stainless steel heat exchangers, offering superior corrosion resistance and longevity compared to Rheem’s copper-based components.

💡 The Verdict:

• Rinnai Infinity 26 lasts longer, requires less maintenance, and provides better overall reliability.

Energy Efficiency & Running Costs

With higher energy star ratings, Rinnai models outperform Rheem and Dux in terms of efficiency. The Rinnai Infinity 26 features Puretemp™ technology, ensuring precise temperature control and no wasted energy, while the Rheem Metro 26 operates at a slightly lower efficiency.

💡 The Verdict:

• Rinnai models deliver better efficiency, lowering your energy bills over time.

Smart Features & User Experience

Both Rinnai Infinity 26 and Rheem Metro 26 offer digital temperature controllers for user convenience, but Rinnai takes it further with:
✔ Wi-Fi compatibility (optional module available)
✔ Smart control integration
✔ More precise temperature regulation

💡 The Verdict:

• Rinnai models offer better smart features, making them more user-friendly and future-proof.

Noise Levels – Which One is Quieter?

All four models operate at low noise levels, but Rinnai Infinity 26 is noticeably quieter due to its advanced sound-dampening technology.

💡 The Verdict:

• Rinnai Infinity 26 is the best choice if you need a near-silent system.

Warranty & After-Sales Support

Rinnai offers one of the best warranties in the industry, with a 12-year heat exchanger warranty on the Infinity 26, compared to 10 years for Rheem.

💡 The Verdict:

• Rinnai wins again with an industry-leading warranty and excellent customer service.

Overall Verdict – Which One Should You Choose?

✅ Best for Longevity & Performance → Rinnai Infinity 26
✅ Best for Budget-Friendly Installations → Rinnai B26
✅ Best for Retrofit Compatibility → Rinnai B26
✅ Best for Smart Features & Energy Efficiency → Rinnai Infinity 26
✅ Best Warranty → Rinnai Infinity 26

Final Thoughts – Why Rinnai is the Better Choice

While Rheem offers solid performance, Rinnai takes the lead in nearly every category, providing:
✔ Better durability & corrosion resistance
✔ Superior energy efficiency
✔ Advanced smart features & Wi-Fi compatibility
✔ Longer warranty & after-sales support
✔ Quieter operation & faster hot water delivery

For homeowners looking for a trouble-free, efficient, and long-lasting hot water system, Rinnai is the clear winner.

Get Your Rinnai System Installed Today!

At JR Gas & Water, we specialize in professional installation of Rinnai and Rheem hot water systems.

💧 Upgrade to a Rinnai today and enjoy superior performance, reliability, and energy savings! 🚀🔥