Gas Instantaneous Hot Water Systems

Reliable, On-Demand Hot Water for Homes Across Melbourne

Fully Insured, Fully Licensed, Competitive Pricing

Professional Installation • System Replacement • Repairs & Servicing

Gas instantaneous hot water systems provide a modern, efficient alternative to traditional storage hot water tanks. Unlike storage systems, these units heat water only when it’s needed, delivering a continuous supply of mains-pressure hot water directly to your taps and showers.

Homes with high hot water demand, multiple bathrooms, or busy families benefit from the convenience and efficiency of on-demand systems. They eliminate the risk of running out of hot water and reduce energy consumption compared to conventional storage tanks.

What Is a Gas Instantaneous Hot Water System?

A gas instantaneous (or continuous flow) hot water system heats water as it flows through the unit, instead of storing hot water in a tank. When a tap is opened, cold water passes through a gas burner that heats it instantly, providing hot water at a constant temperature.

This technology is ideal for homes with fluctuating water usage patterns, as it ensures that hot water is always available when needed, without the delay or energy waste associated with storage tanks.

Benefits of Gas Instantaneous Hot Water Systems

On-Demand Hot Water
Unlike traditional tanks, these systems heat water as it flows. You’ll never run out of hot water, even with multiple taps or showers running simultaneously.

Energy Efficiency
Water is only heated when needed, reducing gas consumption and lowering running costs. Modern systems are designed with low-emission burners and energy-saving technology to minimise environmental impact.

Space-Saving Design
Gas instantaneous systems are compact, often wall-mounted, and ideal for homes with limited indoor or outdoor space. They can replace old storage tanks without requiring major modifications.

Consistent Water Temperature
Advanced temperature controls provide safe and reliable hot water at every tap, preventing scalding and offering precise regulation for comfort.

Durable Construction
These systems are designed for long-term use in Australian homes, with corrosion-resistant materials and components built to withstand daily household demands.

Flexible Installation Options
Gas instantaneous units can be installed indoors or outdoors, with options suitable for natural gas or LP gas connections. Proper venting and flueing ensure safety and optimal performance.

Installation of Gas Instantaneous Systems

Installing a gas instantaneous hot water system requires expertise to ensure safety, efficiency, and long-term reliability. Licensed technicians will assess:

✔ Household hot water demand
✔ Water flow rate and pressure
✔ Gas type and connection requirements
✔ Available mounting space for the unit
✔ Venting and flue requirements

Installation typically includes:

• Removal of existing hot water systems (if required)
• Gas and water connection compliance
• Pressure and temperature testing
• Professional mounting and alignment
• Registration of warranty and support documentation

Proper installation ensures consistent performance, energy efficiency, and compliance with safety standards.

Replacement & System Upgrades

If your existing hot water system is old, inefficient, or unable to meet household demand, upgrading to a gas instantaneous system can improve hot water supply, reduce energy usage, and lower running costs.

Signs it may be time for an upgrade include:

• Inconsistent water temperature
• Hot water running out quickly
• Rising gas bills
• Frequent repairs or leaks
• Systems older than 10–12 years

Upgrading to a modern on-demand system delivers reliable hot water, compact installation, and energy-efficient operation for long-term home comfort.

Servicing & Maintenance

While durable, gas instantaneous systems require periodic servicing to maintain optimal performance. Regular checks include:

• Burner inspection and cleaning
• Temperature and flow rate calibration
• Gas connection and valve inspection
• Flue and vent checks
• Component testing for long-term reliability

Routine maintenance reduces the risk of system failures, ensures safe operation, and prolongs the lifespan of your system.

Accessories & Controllers

Many on-demand systems can be paired with water controllers or remote control units. These allow:

• Pre-setting the desired water temperature
• Switching on water instantly from a tap
• Avoiding manual mixing of hot and cold water
• Improving convenience and energy efficiency

Additional installation accessories, such as flue kits or mounting hardware, help simplify installation and enhance aesthetics.

Upgrade to Gas Instantaneous Hot Water

Switching to a gas instantaneous hot water system provides modern, energy-efficient hot water with:

• Continuous mains-pressure hot water
• Reduced energy consumption
• Compact installation for space-saving
• Safe and consistent temperatures
• Reliable performance for daily household needs

Professional installation, replacement, and servicing ensure your home receives the full benefits of a modern gas instantaneous hot water solution.

Contact Coop Group today to discuss upgrading to an efficient, reliable gas instantaneous hot water system.

Rinnai Gas Instantaneous Hot Water Systems

Coop Group proudly installs Rinnai Gas Instantaneous Hot Water Systems, including the Infinity, Infinity B, and Flowmaster ranges. Rinnai is Australia’s leader in continuous flow gas hot water, offering over 30 years of innovation and trusted performance.

Rinnai systems provide:

• Continuous hot water for multiple taps
• Compact, flexible installation for modern homes
• Advanced electronic temperature control (Puretemp™)
• Energy-efficient, low-emission gas operation
• Long-lasting reliability with robust construction

Infinity / Infinity B

The Rinnai Infinity and Infinity B systems deliver fully electronic, on-demand hot water. Benefits include:

• Continuous mains-pressure hot water
• Energy-efficient gas burners to lower running costs
• Puretemp™ technology for precise temperature control
• Compact design suitable for indoor or outdoor mounting
• Reduced environmental impact through low emissions and water savings

The Infinity B is an upgraded model with improved efficiency, enhanced safety, and modern design, making it ideal for large households or high-demand applications.

Flowmaster Instantaneous

The Flowmaster Instantaneous system is a fully gas-powered unit that requires no electricity, making it perfect for off-grid homes or low-demand applications.

Key features include:

• Continuous hot water without electricity
• Space-saving wall-mounted installation
• Durable construction for Australian conditions
• Reliable and energy-efficient on-demand performance

Controllers & Accessories

Rinnai water controllers enable homeowners to pre-set temperatures and instantly enjoy hot water at the tap. Accessories, including flue kits and mounting hardware, improve installation efficiency and system aesthetics.

Upgrade to a Rinnai Gas Instantaneous Hot Water System

Rinnai Gas Instantaneous Hot Water Systems combine efficiency, convenience, and reliability for Australian households. These systems provide:

• On-demand mains-pressure hot water
• Energy-efficient operation to reduce gas consumption
• Safe, consistent water temperatures
• Compact and flexible installation
• Trusted performance from a market-leading brand

Contact Coop Group today to install a modern, high-performance Rinnai Gas Instantaneous Hot Water system for your home.

This is an image of a Rinnai Gas Instantaneous Hot Water System installed by Coop Group in Melbourne

This is an image of a black Rinnai Gas Instantaneous Hot Water System installed by Coop Group on the Coop Group website who service Bayswater, Dandenong, Croydon, Melbourne

      EXCELLENT  
   Based on 202 reviews 
    
 
 
 
   
 
 
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   Colleen Waldron 
 
 
 
 Trustindex verifies that the original source of the review is Google. The boys did a great installing our air con they were friendly id be happy to call them out to do a service in the future
  
 
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   Clare Morse 
 
 
 
 Trustindex verifies that the original source of the review is Google. Right from the first contact, prompt communication, excellent service, turned up on time, I have already recommended to friends And talked about how smooth the whole process was. Thanks Coop Group Clare and Joe
  
 
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   Carly Salmon 
 
 
 
 Trustindex verifies that the original source of the review is Google. I read the recommendations of the other google reviews and they were right, these guys are great! I had an issue with my gas ducted heating and was able to promptly book in with Coop Heating and Air conditioning to have the unit serviced. They communicated well and text ahead of arrival. Bruno attended and he was fantastic, very knowledgeable, polite and helpful. He sorted out the issue quickly and gave good advice about the unit. Good company, good service, would recommend.
  
 
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   Stephen Griffiths 
 
 
 
 Trustindex verifies that the original source of the review is Google. Prompt efficient service comprising quote, and installation of new gas unit within two days. Reasonably priced unit and installation team were great. A good company to deal with.
  
 
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   Brad Auj 
 
 
 
 Trustindex verifies that the original source of the review is Google. Could not have been happier with the Coopair team from Tayla at admin to Bruno and team in the field. Very efficient and excellent at explaining things. Excellent touch with the full detailed report at the end!
  
 
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   Faro Hazrat 
 
 
 
 Trustindex verifies that the original source of the review is Google. Amazing work, very polite and professional
  
 
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   Prithiva Singham 
 
 
 
 Trustindex verifies that the original source of the review is Google. Really appreciated that the same service person (Bruno) attended as the last time, hence he knew exactly what to do and where everything was in our home. Great service.
  
 
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   Tina Whitehead 
 
 
 
 Trustindex verifies that the original source of the review is Google. Thank you for the super fast response and installation Great service
  
 
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   Sarah Burgin 
 
 
 
 Trustindex verifies that the original source of the review is Google. We had the pleasure of Angus attending our premises to install a new split system. He worked on his own and did so very well. An engaging young man who is a hard worker. Definitely 5 stars to him
  
 
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   ElBeesVideos 
 
 
 
 Trustindex verifies that the original source of the review is Google. These guys are fantastic! Fast, efficient, tidy, polite & on time! Have actually just contacted them since the job we had completed earlier in the year to get some of our older split systems replaced. Highly recommend!