2025 Continuous Flow Gas Hot Water System Awards

Finding the Best Continuous Flow Gas Hot Water System

When it comes to reliable, energy-efficient, and instant hot water, a continuous flow gas hot water system is a top choice for many households. These systems provide unlimited hot water, operate on-demand, and can significantly reduce energy bills compared to traditional storage systems.

At JR Gas & Water, we’ve analyzed the top continuous gas hot water systems on the market, ranking them based on:

✅ Energy efficiency (Star Rating) ✅ Flow rate (LPM) – performance at peak demand ✅ Initial installation cost ✅ Longevity and build quality ✅ After-sales support and warranty ✅ Special features like smart controls and condensing technology

After rigorous evaluation, here’s our 2025 continuous flow gas hot water system showdown! 🚀

🏆 2025 Continuous Flow Gas Hot Water System Rankings

🥇 1. Rinnai B26 – Best Overall Performer ⭐11

🥈 2. Rinnai Infinity 26 – Best for Energy Efficiency & Performance ⭐10

🥉 3. Rinnai Infinity Touch 26 – Best for Smart Controls ⭐10 4️⃣

4. Rheem 26 – Best for Reliable Standard Performance ⭐10 5️⃣

5. Vulcan Duomax 26 – Best Budget Option ⭐10 6️⃣

6. Bosch 16H – Best for Small Homes ⭐8 7️⃣

7. Rinnai Enviro 26 – Best for Eco-Friendly Heating ⭐7 8️⃣

8. Thermann R-Series 26 – Best for Standard Efficiency ⭐6 9️⃣

9. Dux Always Hot 26 – Best for Budget Homes ⭐5 🔟

10. Thermann G-Series 26 – Best for Mid-Range Performance ⭐5 1️⃣1️⃣

11. Onsen 26 – Best for Off-Grid Installations ⭐4 1️⃣2️⃣

12. Chromagen Eternity 26 – Best for Basic Reliability ⭐3 1️⃣3️⃣

13. Dux 26L Condensing – Best for High Efficiency (Condensing Unit) ⭐2.6 1️⃣4️⃣

14. Thermann C7 26 – Best for Mid-Tier Performance ⭐2

🥇 1. Rinnai B26 – Best Overall Performer

Score: ⭐11

• Energy Efficiency: ★★★★☆ (6-star)

• Flow Rate: 26LPM (High capacity)

• Gas Type: NG & LPG

• Special Features: Reliable, budget-friendly, compact size

• Best For: Households needing an affordable, high-performing hot water system

Why It’s #1:

The Rinnai B26 delivers an outstanding balance of performance, affordability, and reliability. With a 6-star energy rating and strong after-sales support, this model is a top choice for most Australian households. Its compact size makes it easy to install, while its consistent flow rate of 26LPM ensures that multiple taps and showers can run without fluctuations in temperature.

This system is ideal for families and medium-to-large households, offering continuous hot water on demand while maintaining low running costs. Unlike more expensive premium models, the B26 delivers excellent value without unnecessary add-ons. It’s a perfect entry-level option for those wanting an efficient and cost-effective water heating solution.

✅ Pros:

✔️ High flow rate, ideal for families ✔️ Affordable with a strong reputation ✔️ Low maintenance & durable design ✔️ Reliable warranty and after-sales support ✔️ Works efficiently in various climates

❌ Cons:

• No advanced smart features

• Standard efficiency compared to premium models

• May require a temperature controller for precise adjustments

Who Should Buy It?

If you’re looking for a cost-effective, reliable, and energy-efficient continuous gas hot water system, the Rinnai B26 is the best all-around choice. Whether for a family home, rental property, or new installation, this system provides exceptional performance without breaking the bank.

🥈 2. Rinnai Infinity 26 – Best for Energy Efficiency & Performance

Score: ⭐10

• Energy Efficiency: ★★★★☆ (6-star)

• Flow Rate: 26LPM (Strong water delivery)

• Gas Type: NG & LPG

• Special Features: High-efficiency, premium model

• Best For: Homeowners prioritizing energy savings and premium quality

Why It’s #2:

The Rinnai Infinity 26 is a step up from the B26, offering higher efficiency and premium performance. This is a great choice for energy-conscious users looking to lower running costs. Its advanced engineering ensures steady water temperatures, making it ideal for families who use multiple hot water outlets simultaneously.

With enhanced energy-saving features, this model reduces gas consumption, helping to cut down on utility bills while still delivering strong water pressure. Built for long-term reliability, the Infinity 26 is one of the best premium options available.

✅ Pros:

✔️ High efficiency reduces energy costs ✔️ Strong and consistent water flow ✔️ Premium build quality ensures durability ✔️ Reliable warranty and excellent after-sales support ✔️ Low NOx emissions for an eco-friendly choice

❌ Cons:

• Slightly higher upfront cost than budget models

• No built-in smart controls (requires an add-on)

• Requires professional installation for optimal performance

Who Should Buy It?

If you want a high-performance, energy-efficient hot water system that delivers consistent temperature and strong water flow, the Rinnai Infinity 26 is a top-tier option. Perfect for families and energy-conscious homeowners looking to maximize efficiency and performance.

🥉 3. Rinnai Infinity Touch 26 – Best for Smart Controls

Score: ⭐10

• Energy Efficiency: ★★★★☆ (6-star)

• Flow Rate: 26LPM

• Gas Type: NG & LPG

• Special Features: Touchscreen temperature control

• Best For: Tech-savvy users who want advanced control features

Why It’s #3:

If you love convenience, the Infinity Touch 26 offers smart temperature controls, allowing users to customize hot water settings easily. With its touchscreen interface, adjusting the water temperature is simpler and safer, especially for households with young children or elderly family members.

This model provides instant hot water with minimal energy waste, maintaining consistent temperatures even with multiple taps running. While it shares the same efficiency and flow rate as the Infinity 26, its added touchscreen control system makes it stand out for users who prioritize ease of use and smart technology.

✅ Pros:

✔️ Smart control panel for precise temperature adjustments ✔️ High flow rate ensures strong water pressure ✔️ Energy-efficient with reduced gas consumption ✔️ Safe for families with pre-set temperature options ✔️ Trusted Rinnai brand with excellent after-sales support

❌ Cons:

• Higher upfront cost than standard models

• Requires professional installation

• Touchscreen interface may not appeal to all users

Who Should Buy It?

If you’re looking for a modern, smart-controlled gas hot water system that makes temperature adjustments effortless, the Rinnai Infinity Touch 26 is an excellent choice. Ideal for tech-savvy homeowners and families wanting extra safety controls.

4. Rheem 26 – Best for Reliable Standard Performance

Score: ⭐10

• Energy Efficiency: ★★★★☆ (6-star)

• Flow Rate: 26LPM

• Gas Type: NG & LPG

• Special Features: Proven Rheem durability

• Best For: Homeowners looking for a trusted and reliable system

Why It’s #4:

The Rheem 26 is a highly trusted and widely used continuous flow gas hot water system, offering strong reliability and consistent performance. Known for its durable build and long lifespan, this model is an excellent choice for homeowners who want a no-fuss, dependable hot water solution.

Designed with efficient gas consumption, the Rheem 26 provides steady hot water even when multiple taps are in use. It’s a great mid-tier option that balances cost, efficiency, and long-term reliability.

✅ Pros:

✔️ Strong reputation for longevity ✔️ 6-star efficiency rating for energy savings ✔️ Affordable pricing for a trusted brand ✔️ Consistent hot water supply for medium to large households ✔️ Easy availability of parts and servicing

❌ Cons:

• No advanced features like smart controls

• Standard design compared to higher-end models

• Not as compact as some competitors

Who Should Buy It?

If you need a reliable, efficient, and well-built continuous gas hot water system from a trusted brand, the Rheem 26 is an excellent choice for long-term dependability.

5. Vulcan Duomax 26 – Best Budget Option

Score: ⭐10

• Energy Efficiency: ★★★★☆ (6-star)

• Flow Rate: 26LPM

• Gas Type: NG & LPG

• Special Features: Affordable and reliable

• Best For: Homeowners seeking a low-cost, high-value system

Why It’s #5:

The Vulcan Duomax 26 is a cost-effective alternative that provides solid performance without the premium price tag. Designed for reliability and efficiency, this model is perfect for budget-conscious households that need continuous hot water without extra frills.

Despite its lower upfront cost, the Duomax 26 still maintains a 6-star energy rating, ensuring efficient gas consumption and lower running costs over time. It’s a great option for rental properties, first-time homeowners, or those simply looking to replace an older system without breaking the bank.

✅ Pros:

✔️ Budget-friendly with decent performance ✔️ 6-star energy efficiency keeps costs down ✔️ Reliable hot water delivery for most households ✔️ Simple and easy-to-use design ✔️ Well-supported by after-sales service

❌ Cons:

• Fewer advanced features compared to premium models

• Standard design with no smart controls

• May not be as durable as high-end options

Who Should Buy It?

If you’re looking for an affordable, efficient, and reliable continuous gas hot water system that delivers consistent performance without unnecessary extras, the Vulcan Duomax 26 is a fantastic budget-friendly choice.

6. Bosch 16H – Best for Small Homes

Score: ⭐8

• Energy Efficiency: ★★★☆☆ (5-star)

• Flow Rate: 16LPM

• Gas Type: NG & LPG

• Special Features: Compact design, great for smaller households

• Best For: Homeowners with low to moderate hot water demand

Why It’s #6:

The Bosch 16H is an efficient and compact gas hot water system designed for smaller households, apartments, or units with lower hot water usage. While it has a lower flow rate (16LPM) compared to larger models, it still delivers consistent and reliable performance for one to two bathrooms.

With its outdoor installation design, this model is space-saving and operates with lower gas consumption, making it a great cost-effective solution for homes that don’t require a high flow rate.

✅ Pros:

✔️ Compact and space-saving ✔️ Lower gas consumption saves on energy bills ✔️ Reliable hot water supply for small homes ✔️ Good warranty and support from Bosch ✔️ Affordable pricing

❌ Cons:

• Lower flow rate not suitable for large households

• Not ideal for multiple simultaneous hot water uses

• No smart or advanced control features

Who Should Buy It?

If you live in a small home, unit, or apartment and want an affordable, efficient, and compact gas hot water system, the Bosch 16H is an excellent low-cost option that delivers consistent hot water performance.

7. Rinnai Enviro 26 – Best for Eco-Friendly Heating

Score: ⭐7

• Energy Efficiency: ★★★★★ (7-star)

• Flow Rate: 26LPM

• Gas Type: NG & LPG

• Special Features: High efficiency, low emissions, condensing technology

• Best For: Homeowners looking for a sustainable, energy-saving option

Why It’s #7:

The Rinnai Enviro 26 is the most energy-efficient gas hot water system on this list, featuring an impressive 7-star energy rating. Thanks to its condensing technology, this unit reuses waste heat to reduce gas consumption, making it an ideal choice for environmentally-conscious households looking to lower their carbon footprint and energy bills.

This model is perfect for families who want instant hot water with minimal impact on the environment. It’s designed to be ultra-efficient, but the higher upfront cost may be a factor for budget-conscious buyers.

✅ Pros:

✔️ Highest efficiency (7-star rating) for maximum gas savings ✔️ Low NOx emissions, making it an eco-friendly option ✔️ Condensing technology reduces waste heat ✔️ High flow rate suitable for larger households ✔️ Reliable after-sales support from Rinnai

❌ Cons:

• Higher upfront cost compared to standard models

• Condensing units may require slightly more maintenance

• Larger installation space may be needed for condensate drainage

Who Should Buy It?

If you want a sustainable, highly efficient gas hot water system that offers long-term savings and a low environmental impact, the Rinnai Enviro 26 is the best choice for eco-conscious homeowners looking for a premium, high-efficiency unit.

8. Thermann R-Series 26 – Best for Standard Efficiency

Score: ⭐6

• Energy Efficiency: ★★★★☆ (6-star)

• Flow Rate: 26LPM

• Gas Type: NG & LPG

• Special Features: Reliable standard unit, cost-effective

• Best For: Homeowners looking for an affordable, reliable gas hot water system

Why It’s #8:

The Thermann R-Series 26 is a solid all-rounder that provides standard efficiency and performance at an affordable price. While it doesn’t have premium features or high-tech add-ons, it is a dependable workhorse that ensures continuous hot water for medium to large households.

With a 6-star energy rating, this unit offers good energy savings compared to older models while maintaining a consistent hot water flow. It is a budget-friendly alternative for those who want reliable performance without unnecessary extras.

✅ Pros:

✔️ Affordable without compromising performance ✔️ 6-star energy efficiency keeps running costs low ✔️ Strong flow rate suitable for families ✔️ Simple, reliable design with fewer maintenance concerns ✔️ Widely available spare parts and support

❌ Cons:

• Lacks advanced smart features found in premium models

• Build quality is slightly lower compared to top-tier brands

• May not be as durable as high-end options

Who Should Buy It?

If you’re looking for a cost-effective and reliable continuous gas hot water system that gets the job done without breaking the bank, the Thermann R-Series 26 is a great choice for standard home use.

9. Dux Always Hot 26 – Best for Budget Homes

Score: ⭐5

• Energy Efficiency: ★★★★☆ (6-star)

• Flow Rate: 26LPM

• Gas Type: NG & LPG

• Special Features: Cost-effective, simple design

• Best For: Homeowners looking for a budget-friendly, reliable hot water solution

Why It’s #9:

The Dux Always Hot 26 is a practical and affordable option for households that need a dependable hot water system without the high price tag. It maintains consistent hot water flow, making it suitable for smaller to medium-sized homes.

This model is simple to install and low maintenance, ensuring that it remains a cost-effective solution over the long term. While it lacks advanced efficiency features, it still delivers reliable heating performance at a reasonable price point.

✅ Pros:

✔️ Budget-friendly with a solid performance ✔️ 6-star energy rating helps reduce gas costs ✔️ Reliable and durable design for longevity ✔️ Easy installation with standard fittings ✔️ Widely available replacement parts

❌ Cons:

• Basic model without smart features

• Not as efficient as premium options

• Warranty period is shorter compared to competitors

Who Should Buy It?

If you’re looking for an affordable, reliable, and easy-to-maintain gas hot water system, the Dux Always Hot 26 is a great choice for budget-conscious homeowners who want consistent hot water without extra costs.

10. Thermann G-Series 26 – Best for Mid-Range Performance

Score: ⭐5

• Energy Efficiency: ★★★★☆ (6-star)

• Flow Rate: 26LPM

• Gas Type: NG & LPG

• Special Features: Standard efficiency, reliable performance

• Best For: Homeowners wanting a mid-range system with solid efficiency

Why It’s #10:

The Thermann G-Series 26 is a mid-range performer, offering reliable hot water delivery without the premium cost of high-end models. While it doesn’t feature advanced smart technology, it provides solid efficiency and low maintenance requirements.

It is a great option for homes needing a consistent flow of hot water at an affordable running cost. Well-suited for medium-sized households, this model balances performance and affordability, making it a worthy consideration in the market.

✅ Pros:

✔️ 6-star energy rating ensures efficient operation ✔️ Reliable hot water delivery for everyday use ✔️ Decent build quality for the price ✔️ Compatible with NG and LPG setups ✔️ Affordable compared to premium models

❌ Cons:

• Lacks premium features found in higher-end brands

• Warranty is not as comprehensive as competitors

• May require additional servicing over time

Who Should Buy It?

If you’re looking for a standard, mid-range continuous gas hot water system with good efficiency and reliability, the Thermann G-Series 26 is a solid choice without a hefty price tag.

Final Thoughts: Choosing the Best Gas Hot Water System

Selecting the right continuous gas hot water system depends on:

• Your budget

• The size of your household

• Whether you prioritize energy efficiency or special features

✅ Best Overall: Rinnai B26 – Perfect for most families

✅ Best Premium: Rinnai Infinity 26 & Touch 26 – Ideal for high-end efficiency

✅ Best Budget: Vulcan Duomax 26 & Dux Always Hot 26 – Affordable choices without sacrificing performance

✅ Best for Eco-Friendly Users: Rinnai Enviro 26 – Lower emissions with high efficiency

At JR Gas & Water, we offer expert installation and competitive pricing on all major continuous flow gas hot water systems. Let us help you choose the perfect model for your home! 🔥💧

🚀 Explore our full range at JR Gas & Water or contact us for expert advice and installation.