Exploring Durability and Efficiency: Critical Review and Long Term Case Study Rinnai Enviro Series Instant Gas Hot Water Systems

Apr 21, 2023

Rinnai 32 Enviro Review: Is It the Most Efficient Instant Gas Hot Water System?

If you’re searching for an energy-efficient, durable, and reliable gas hot water system, the Rinnai** 32 Enviro** is a strong contender. This compact unit not only excels in conserving energy but also integrates advanced technology for improved efficiency and reliability. This review dives into long-term performance, operational costs, and real-world user experiences to see if it lives up to the hype.

Overview of the Rinnai Infinity 32 Enviro

The Rinnai Infinity 32 Enviro is a premium eco-efficient continuous flow gas hot water system designed for homes with 2-3 bathrooms and can accommodate up to 4 in warmer climates. This system is engineered to provide a luxurious hot water experience while minimizing household running costs and reducing its carbon footprint. With its advanced condensing technology and high-efficiency heat exchanger, the Rinnai Infinity 32 Enviro is an ideal choice for those seeking a sustainable and economical hot water solution.

Key Features of the Rinnai 32 Enviro

✔ 7-Star Equivalent Efficiency Rating – One of the most energy-efficient gas hot water systems available.

✔ Continuous Flow Technology – Heats water only when needed, reducing energy waste.

✔ Puretemp™ Technology – Maintains stable water temperature, preventing sudden hot or cold bursts.

✔ Condensing Technology – Captures and reuses heat from exhaust gases, improving efficiency.

✔ Solar Compatible – Can integrate with renewable energy sources for even greater savings.

✔ Anti-Frost Protection – Reliable operation even in cold climates (down to -30°C).

✔ Stainless Steel Heat Exchanger – Corrosion-resistant for long-term durability.

✔ Inbuilt Condensate Neutralizer Kit – Improves environmental performance.

✔ Enhanced Safety Monitor – Provides electronic safety monitoring and built-in status operation monitoring, ensuring safe operation and optimal performance while promoting energy efficiency and giving users peace of mind regarding their hot water supply.

Technical Specifications

The Rinnai Infinity 32 Enviro boasts an impressive array of technical specifications that make it a top-of-the-line continuous flow hot water system. Some of its key features include:

Flow Rate: Up to 37 litres per minute, making it suitable for larger homes with high hot water demands.
Gas Type: Available in both Natural Gas and LPG models.
Factory Pre-Set Max Delivery Temperature: 60°C, which can be decreased by an authorised person such as a licensed plumber.
Optional Temperature Controllers: Available for added convenience and control.
Energy Rating: 6.3* Equivalent energy rating, indicating its high energy efficiency.
Condensing Technology: Inbuilt Energy Recovery System (Condensing Technology) that captures latent heat from flue gases, resulting in a smaller carbon footprint and higher thermal efficiency.
Heat Exchanger: High-efficiency heat exchanger that uses less gas and pre-heats the water with exhaust heat.
Warranty: 12-year parts and 3-year labour warranty on the heat exchanger, with extended warranty options available.

Is the Rinnai 32 Enviro Really Energy-Efficient?

The 7-star equivalent efficiency rating sets the Rinnai 32 Enviro apart from most standard gas hot water systems. Unlike traditional models, it uses condensing technology to capture waste heat, making it up to 97% thermally efficient and utilizing considerably less gas.

How Does It Save on Energy by Conserving Energy?

🔹 Only heats water on demand – No wasted energy on reheating stored water. 🔹 Condensing system recycles heat – Reduces gas consumption. 🔹 Lower carbon footprint – Cuts greenhouse gas emissions compared to standard gas systems.

📉 Energy Cost Savings: Users report 30-50% lower gas bills compared to older gas storage water heaters, significantly reducing household running costs. This makes it a smart long-term investment, especially for large households with high hot water usage.

Long-Term Performance & Durability

A major selling point of the Rinnai 32 Enviro is its low maintenance and long-lasting durability.

Compared to traditional gas storage tanks, the Rinnai 32 Enviro's continuous flow technology consumes significantly less gas and operates only when needed, thereby conserving energy and lowering running costs while achieving high thermal efficiency.

💪 What Makes It Last?✅ Stainless Steel Heat Exchanger – More resistant to corrosion than traditional copper. ✅ No Standing Pilot Light – Reduces wear and tear on components. ✅ Inbuilt Frost Protection – Prevents damage in colder climates.

🔎 User Case Study:A household using the Rinnai 32 Enviro for 8+ years reported consistent temperature stability, zero major breakdowns, and only minor servicing required (such as filter cleaning). This aligns with its 12-year heat exchanger warranty, confirming reliable long-term performance.

Installation & Setup: Is It Easy?

The Rinnai 32 Enviro is compact, lightweight, and wall-mountable, making it easy to install for most homes and saves precious outdoor space.

🔹 Standard Fitting Sizes – Simple upgrade from an existing gas system. 🔹 Solar Compatible – Can integrate with existing solar hot water systems. 🔹 Flexible Temperature Settings – Pre-set at 50°C or 60°C (adjustable up to 75°C with controllers).

🚨 Common Installation Mistakes to Avoid:⚠ Undersizing the unit – Ensure it’s matched to household demand. ⚠ Incorrect metal pipe compatibility – Use approved fittings to prevent corrosion. ⚠ Skipping a tempering valve (above 60°C settings) – Required by Australian plumbing standards.

📍 Installation Tip: Hire a licensed plumber to ensure warranty validity and compliance with safety regulations.

User Experience & Customer Satisfaction

What Users Love: Precise Temperature Control

✅ Reliable hot water supply – Handles multiple showers and appliances at once.

✅ Precise temperature control – No sudden hot/cold surges.

✅ Compact design – Ideal for space-saving wall installation.

✅ Reduced gas bills – Users report big savings on energy costs.

✅ Natural gas models – Available for different household needs, offering superior efficiency with lower gas consumption and advanced technologies like wireless controllers and built-in temperature control for enhanced user comfort.

Challenges & Common Issues:

⚠ High Initial Cost – Higher upfront price than non-condensing systems.
⚠ Requires Yearly Maintenance – Filters and gas components need periodic checks.
⚠ Sensitive to Low Water Flow Rates – May need minimum flow adjustment if water pressure is too low.

📍 User Verdict:
🔹 95% of reviews rate it 4+ stars, praising efficiency, reliability, and cost savings.
🔹 Minor complaints about installation costs, but long-term savings offset the expense.

How Does the Rinnai 32 Enviro Compare?

Feature	Rinnai 32 Enviro	Rinnai Infinity 26	Standard Gas Storage
Efficiency Rating	⭐⭐⭐⭐⭐⭐ (7-Star)	⭐⭐⭐⭐⭐ (6.1-Star)	⭐⭐⭐ (3-4 Star)
Gas Consumption (MJ/hr)	160	199	200+
Heat Exchanger	Stainless Steel	Copper	Copper
Continuous Flow?	✅ Yes	✅ Yes	❌ No (Storage Tank)
Greenhouse Gas Reduction	✅ Yes	❌ Lower	❌ Higher
Running Cost Savings	✅ 30-50% Lower	✅ Lower than storage	❌ High ongoing costs
Installation Complexity	⚠ Medium	✅ Easy	✅ Easy

📌 Key Takeaway:
The Rinnai 32 Enviro outperforms standard gas hot water systems in efficiency, cost savings, and environmental impact.

Is the Rinnai 32 Enviro Worth It?

Who Should Buy It?

🏡 Large households (4+ people) – Handles high demand.
🌿 Eco-conscious homeowners – Lower carbon footprint.
💰 Those looking for long-term savings – Higher upfront cost, but lower energy bills.
🏠 New builds or energy-efficient upgrades – Integrates with solar & renewable systems.

🚫 Who Might Skip It?
❌ Budget-conscious buyers – Higher initial cost.
❌ Small households with low water usage – May not need such high capacity.

📍 Final Verdict:
✅ Best-in-class energy efficiency & long-term savings.
✅ Durable, low-maintenance, and reliable.
✅ Smart investment for homes with high hot water demand.

👉 Want instant, efficient hot water with lower energy bills? The Rinnai 32 Enviro is one of the best choices available today!

Frequently Asked Questions (FAQs)

How long does a Rinnai 32 Enviro last?

The heat exchanger has a 12-year warranty, but with proper maintenance, units can last 15+ years.

Is the Rinnai 32 Enviro better than Rinnai Infinity 26?

Yes! The Enviro 32 has a higher 7-star efficiency, meaning lower gas usage and energy savings.

Can I connect the Rinnai 32 Enviro to a solar hot water system?

Yes! The Enviro series is compatible with solar hot water boosters, reducing gas usage even further.

How much gas does the Rinnai 32 Enviro use?

It consumes 160 MJ/hr, which is lower than most standard gas systems while still delivering high flow rates.

Do I need a tempering valve for the Rinnai 32 Enviro?

Yes, if your water temperature is set above 60°C, Australian regulations require a tempering valve for safety.

Conclusion

The Rinnai Infinity 32 Enviro is a superior continuous flow hot water system that offers a unique combination of eco-efficiency, high energy rating, and advanced condensing technology. Its ability to withstand tough Australian conditions, save precious outdoor space, and provide a luxurious hot water experience make it an ideal choice for homeowners seeking a sustainable and economical hot water solution.