Rinnai Gas Hot Water Systems

Rinnai Gas Hot Water Systems

Rinnai gas hot water systems are available in a host of options including multiple continuous flow systems, hot water storage tanks, warm water valves and heat exchange tanks. Using this technology in conjunction with a wide range of accessories such as solar pre-heating, common flue, circulating pumpsets, controllers and BMS take off points a centralised solution is available for almost any application.

Complete systems can be pre-assembled and skid mounted in our state-of-the-art factory. In addition, our dedicated commercial team can design a modular solution, that can be easily transported and installed, to meet your criteria.

A. Manifold Pack – Peak performer

• Suitable for cafés and child care centres
• Small amenities blocks
• Factories

Our manifold pack consists of 2 to 25 heavy-duty continuous flow water heaters plumbed together. This allows for higher flow rates than a single unit can achieve. The outlet temperature is preset and remains constant, even when the flow varies, providing a reliable source of hot water that only uses gas when there is a demand.

B. Demand Duo – Delivers on Demand

• Hotels and Motels
• Apartment blocks
• Student Accommodations

Rinnai’s Demand Duo system links from one to six of our highly efficient heavy-duty continuous flow water heaters to a heavily insulated stainless steel storage tank. The linking of water heaters to a storage tank, allows for short periods of peak hot water use that are greater than the continuous flow rate the water heaters can achieve on their own. Using new controller technology that offers various temperature settings and a host of other features you can’t go wrong with a Demand Duo.

Whats more the Demand Duo 1 is the perfect solution to replace your existing storage hot water heater with no changes required to the water pipes.

C. Hex250 – Efficiently Manages Water Quality

• Separates consumable water from the heat source
• Stainless steel tanks and coils
• European temperature control technology

The HEX250 is designed to manage water quality across an extensive range of commercial applications. It does so by separating consumable hot water from the heat source.

The HEX250 separates the consumable hot water by running it through stainless steel heat exchange coils that sit inside its heavily insulated tank. Using thermal energy, the hot water stored inside the tank heats the coils, which in turn heat the consumable water.

D. Warm Water Valve – Meets Demand

• Suitable for apartment blocks
• Hospitals and nursing homes
• Aged Care facilities

Our Demand Duo Warm Water Valve is a circulating warm water valve designed to accept incoming hot water (60°C or more) from a hot water storage system, and deliver a reduced constant outlet temperature across a full range of flow rates with minimal pressure drop.

E. Solar Pre-Heat Systems – Make Hot Water While The Sun Shines

• Reduce carbon footprint, save on energy costs
• Stainless steel storage tanks
• High efficiency solar collectors

Our solar pre-heat systems can be used in conjunction with any Rinnai water heating unit. By combining energy from the sun with highly efficient gas hot water heating, considerable savings on the running costs associated with producing hot water can be achieved. Using solar energy to pre-heat commercial gas and electric boosted hot water systems reduces energy consumption, as well as significantly reducing CO2 emissions.

F. Common Flue – Internal Installation Made Easy
• Combines flueing of continuous flow water heaters
• Robust modular construction
• Flexible design with natural draft of fan assisted options
• Patented draft divertor design

A common flue system is designed to control the exhaust of flue gases associated with continuous flow water heating in an unobtrusive and safe manner.

Every gas hot water system is different due to many constraints such as hot water demand, spatial restrictions and building construction to name just a few. A Rinnai common flue system is designed with flexibility in mind allowing either a natural draft or fan assisted flue to be tailor made to suit the plant room available. Manufactured in modules using robust materials makes transport and installation into those hard to reach places easy.


Rinnai are proud to introduce the latest addition to our comprehensive range of hot water systems. This compact appliance will deliver hot water without the need for a powerpoint, ideal for replacement of current systems or low demand hot water applications.

Hotflo 10 – Experience our Innovation

• No power required
• 5.6 Star efficiency rating
• Puretemp™ temperature stability
• Comprehensive warranty

Ideal for applications with no power available or where there is a minimal requirement for hot water, Rinnai are proud to introduce the Hotflo 10.

Our renowned Rinnai innovation has inspired this product, which features our unique Puretemp™ temperature stability technology – eliminating hot and cold temperature fluctuations common in older generation hot water systems.

Class leading gas efficiency and a comprehensive warranty makes the Hotflo 10 the obvious choice for your next hot water replacement.


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