Rinnai Hot Water Systems from $559
Our Top 3 Rinnai Hot Water Systems
Choose How You Want to Order
Not every hot water job is the same. Choose supply only if you already have an installer arranged, or select a supplied and installed option where available.
Supply Only
Best if you already have a licensed plumber, gas fitter or electrician arranged.
Your product price is for the hot water system only. Installation is not included unless shown or selected separately.
Valves, old unit removal, disposal, electrical work, pipework changes, gas work and compliance upgrades may be required depending on your installation.
Supplied & Installed
Best if you want the hot water system and installation organised together.
Select your preferred system, answer the installation questions on the product page and choose any required installation options before checkout.
Installation availability and final requirements depend on your location, access, product type, existing services and site conditions.
Not Sure What You Need?
Hot water systems vary by size, energy source, household demand and installation setup.
Compare the available hot water systems below or use the selection tools throughout the site to narrow down the right option for your home.
Consider household size, energy source, available space, hot water demand, running costs and installation requirements before choosing.
Rinnai Hot Water Systems for Brisbane, Gold Coast & Major Australian Metros
Rinnai hot water systems are available across electric storage, heat pump and gas hot water technologies, including Rinnai Infinity and B-Series continuous-flow gas systems and Rinnai Enviroflo heat pumps.
This makes Rinnai particularly useful for customers wanting to compare several hot water technologies within the same brand, whether replacing an existing Rinnai system or changing to a different hot water type.
Installed Today supplies Rinnai hot water systems across supported mainland Australian markets, with supplied and installed options available on selected systems in eligible Brisbane and Gold Coast service areas.
What Types of Rinnai Hot Water Systems Are Available?
Compare Rinnai Hot Water System Types
| Rinnai Type | How It Works | Common Starting Point | Main Checks |
|---|---|---|---|
| Electric Storage | Electric element heats water stored inside a tank | Existing electric-storage replacement | Capacity, elements, dimensions and electrical supply |
| Enviroflo Heat Pump | Transfers heat from surrounding air into stored water | More efficient electric hot-water upgrade | Capacity, airflow, noise, drainage and electrical requirements |
| Infinity / B-Series | Gas heats water as it flows through the appliance | Existing continuous-flow replacement or suitable gas property | Flow rate, gas type, gas supply and simultaneous demand |
| Gas Storage | Gas burner heats water stored inside a tank | Existing gas-storage replacement where available | Gas type, capacity, recovery, dimensions and clearances |
Rinnai Electric Hot Water Systems
Rinnai electric storage systems are commonly compared for straightforward replacement of an existing electric hot-water tank. They heat water with an electric element and store it ready for household use.
The current Installed Today range includes Rinnai electric storage systems across several common capacities, including compact tanks and larger family-sized 250L, 315L and 400L-class systems.
Choose the replacement around household demand, existing tank size, element configuration, electrical setup, dimensions and installation position rather than simply selecting the largest tank.
Rinnai Enviroflo Heat Pump Hot Water Systems
Rinnai Enviroflo heat pumps use electricity to operate a refrigeration cycle that collects heat from surrounding air and transfers it into stored water.
The current Rinnai collection includes Enviroflo models across several capacities, including GR-Series and AR-Series options suited to different household demands.
Heat pumps need more site planning than a standard electric tank. Compare tank capacity, airflow, noise, drainage, electrical connection, outdoor position, service access and household recovery requirements.
Rinnai Infinity Continuous Flow Hot Water
Rinnai Infinity systems are gas continuous-flow water heaters that heat water as it passes through the unit instead of storing a full tank of hot water.
They can suit homes already using natural gas or LPG where the household wants compact wall-mounted gas hot water and the property has sufficient gas supply and water pressure.
Continuous-flow systems are selected by flow performance rather than tank capacity, so household demand and simultaneous hot-water use are critical.
Rinnai B16, B20 and B26 Gas Hot Water Systems
The current Installed Today range includes Rinnai B-Series continuous-flow systems across B16, B20 and B26 classes, with Natural Gas and LPG options represented.
B16
A lower-flow residential continuous-flow class commonly compared for smaller homes and lower simultaneous hot-water demand.
B20
Provides additional continuous-flow capacity for small to medium household applications where site conditions suit.
B26
A higher residential flow class commonly compared for family homes and stronger simultaneous hot-water demand.
Natural Gas vs LPG Rinnai Hot Water
Rinnai continuous-flow gas systems are available in different fuel configurations depending on the model.
Natural Gas
Designed for properties connected to an appropriate natural-gas supply.
LPG
Designed for properties using bottled or bulk LPG rather than mains natural gas.
Confirm Before Ordering
Natural Gas and LPG appliances are not automatically interchangeable. Confirm the property's fuel type before ordering.
Choosing the Right Rinnai Gas Flow Rate
The correct Rinnai continuous-flow size depends less on the total number of occupants than on how much hot water may be required at the same time.
A household that rarely operates more than one shower at once can have different requirements from a home where multiple bathrooms are used simultaneously.
- Number of bathrooms
- Simultaneous showers
- Bath use
- Kitchen demand
- Incoming water temperature
- Required outlet temperature
- Water pressure
- Available gas supply
Gas Pipe Capacity Matters for Rinnai Infinity Systems
Continuous-flow gas systems can have substantial gas input requirements, particularly as flow capacity increases.
Existing gas pipework should not automatically be assumed suitable simply because another gas appliance is already installed.
Gas pipe diameter, pipe length, available pressure, regulator capacity and the total connected gas load should be assessed where relevant by an appropriately licensed gas fitter.
Choosing the Right Rinnai Electric Storage Size
Electric-storage sizing is based on stored hot-water demand rather than flow rate.
Smaller tanks can suit compact homes, units and lower-use applications, while larger tanks can suit family homes, multiple bathrooms and stronger peak demand.
If the existing electric tank has always kept up with the household, a comparable capacity is generally the first size to consider. If the household regularly runs out, determine whether the issue is tank size, heating schedule or a fault before simply increasing capacity.
Choosing a Rinnai Enviroflo Size
Heat-pump selection needs to consider both tank capacity and how the system recovers hot water after use.
The current collection includes Enviroflo products across multiple capacities, allowing smaller and larger households to compare systems suited to different daily hot-water demands.
Tank volume should be considered alongside household usage, operating schedule, ambient conditions and the specific model's performance.
Replacing an Older Rinnai Hot Water System
If the existing Rinnai system has performed well and household demand has not changed, a similar Rinnai model is usually the simplest place to start.
Before ordering, compare:
- Existing Rinnai model
- System type
- Tank size or gas flow class
- Natural Gas or LPG
- Physical dimensions
- Connection positions
- Electrical requirements
- Gas supply where applicable
- Water pressure
- Installation clearances
- Access for replacement
- Current household demand
Changing from One Rinnai Hot Water Type to Another
Staying with Rinnai does not mean different Rinnai technologies are direct replacements for one another.
Changing from electric storage to Enviroflo heat pump can alter airflow, drainage and electrical requirements. Changing from gas storage to Rinnai Infinity can alter gas demand, wall mounting, plumbing and electrical requirements.
Compare the benefit of changing technology against the extra conversion work before choosing the replacement.
Rinnai Gas, Electric or Heat Pump?
Rinnai Electric Storage
Often the simplest option where the home already uses conventional electric storage and a straightforward replacement is preferred.
Rinnai Enviroflo
Worth comparing where improved hot-water energy efficiency is a priority and the property has a suitable heat-pump installation position.
Rinnai Infinity / B-Series
Suits properties with suitable Natural Gas or LPG supply where continuous-flow gas hot water is preferred.
Rinnai Installation Requirements Vary by System Type
A Rinnai electric tank, Enviroflo heat pump and Infinity gas system all have different installation requirements.
Electric storage needs suitable tank space, plumbing, drainage and electrical supply. Heat pumps additionally need appropriate airflow, condensate drainage and noise consideration.
Standard external continuous-flow gas units need an appropriate wall position, compliant clearances, suitable gas supply, water connections and electricity where required.
Rinnai Hot Water Systems Brisbane
Brisbane is a primary Rinnai installation market for Installed Today. Selected Rinnai systems can be ordered with professional installation in eligible Brisbane, Logan, Ipswich, Moreton Bay and Redlands service areas.
Brisbane customers can compare Rinnai electric storage, Enviroflo heat pumps and Infinity/B-Series gas systems according to the existing energy source and household demand.
Installation requirements depend on the system, access, plumbing, electrical supply, gas supply, valves, drainage and site conditions.
Rinnai Hot Water Systems Gold Coast
Selected Rinnai hot water systems are also available supplied and installed across eligible Gold Coast service areas.
Like-for-like Rinnai replacement can be relatively straightforward where the existing energy source, capacity and installation location remain suitable.
Changing system type or relocating the appliance can require additional plumbing, gas or electrical work.
Buy Rinnai Hot Water Systems Across Major Australian Metro Areas
Supply-only Rinnai systems are available for customers who already have appropriately licensed trades arranged across supported mainland Australian markets.
Our main Rinnai markets include Brisbane, Gold Coast, Sunshine Coast, Sydney, Melbourne, Perth and Adelaide, together with major centres including Townsville, Cairns, Toowoomba, Newcastle, Central Coast, Wollongong and Geelong.
Brisbane and Gold Coast remain the primary Installed Today installation markets. Customers elsewhere can choose supply only where delivery is available and arrange their own appropriately licensed installer.
Choose How You Want to Order Your Rinnai
Supply Only
Best if you already have appropriately licensed plumbing, electrical or gas trades arranged and simply need the Rinnai system supplied.
Installation, valves, disposal, gas work, electrical work and pipework changes are not included unless specifically shown.
Brisbane Installation
Selected Rinnai hot water systems are available with installation in eligible Brisbane metro service areas.
Availability depends on product, postcode, existing system and site requirements.
Gold Coast Installation
Selected Rinnai systems are also available supplied and installed in eligible Gold Coast areas.
Product and installation requirements are confirmed through the applicable ordering pathway.
Choose the Rinnai System That Fits the Property
Choosing Rinnai narrows the brand, but the correct system still depends on the property's energy source, household demand and installation conditions.
Compare system type, tank capacity or continuous-flow output, gas type, dimensions, household demand, electrical or gas requirements, installation position, warranty and replacement compatibility before ordering.
Product specifications, pricing and availability can change. Check the individual Rinnai product information and selected installation option before purchase.
Rinnai Hot Water System FAQs
Straight answers about Rinnai Enviroflo heat pumps, Hotflo electric storage and Infinity natural gas and LPG continuous-flow hot water systems.
What are the most popular Rinnai hot water systems?
Popular Rinnai choices include the Rinnai Enviroflo GR 300L heat pump for larger family homes, the Rinnai Hotflo 250L Electric for family-size electric storage, the Rinnai Infinity B26 Natural Gas for higher-flow mains-gas homes and the Rinnai Infinity B20 LPG for homes using bottled gas. These are currently highlighted by Installed Today as leading Rinnai choices across their respective system types.
Which Rinnai hot water system should I choose?
Choose a Rinnai Hotflo electric storage system when you want a straightforward replacement for an existing electric tank. Choose a Rinnai Enviroflo heat pump when reducing electricity use is more important and the property has suitable outdoor airflow, drainage and electrical supply. Choose a Rinnai Infinity continuous-flow system when the property already uses natural gas or LPG and you want compact wall-mounted hot water heated on demand. The correct option depends on the existing energy source, household demand, installation position and whether changing system type is worthwhile.
Is the Rinnai Enviroflo GR 300L heat pump suitable for a family of 6?
Yes. The Rinnai Enviroflo GR 300L is currently recommended for households of around 6 people. It has a 300L tank, R290 refrigerant, built-in Wi-Fi, solar-PV compatibility, a 10A plug connection and a listed operating noise level of approximately 46 dB. It is a strong option for larger family homes replacing conventional electric storage with a more energy-efficient heat pump.
What is the difference between the Rinnai Enviroflo V2 250L and GR 300L?
The main difference is capacity and household demand. The Rinnai Enviroflo V2 250L is the smaller option and is suitable for households of up to around 5 people depending on use. It uses R290 refrigerant and includes a 2.4kW backup element. The Enviroflo GR 300L increases stored capacity to 300L and is recommended for around 6 people, with built-in Wi-Fi and solar-PV compatibility.
Is the Rinnai Hotflo 250L electric hot water system good for a family?
Yes. The Rinnai Hotflo 250L is a popular family-size electric storage system and is currently recommended by Installed Today for around 5 people. It has a 250L vitreous-enamel-lined steel cylinder, dual-handed plumbing connections, single or twin element options and a maximum 10-year cylinder warranty. It is approximately 605mm wide, making it a practical replacement for many existing 250L electric tanks.
What is the difference between the Rinnai Infinity B16, B20 and B26?
The main difference is continuous-flow capacity. The Rinnai Infinity B16 delivers approximately 16 L/min at a 25°C temperature rise and is best suited to one-bathroom homes with moderate demand. The B20 increases output to approximately 20 L/min and can suit one bathroom or some two-bathroom homes in warmer conditions. The B26 delivers approximately 26 L/min and is the stronger choice for larger households, multiple bathrooms or more simultaneous hot-water use, provided the gas supply and water pressure are suitable.
What is the difference between Rinnai Infinity B26 Natural Gas and LPG?
The Rinnai Infinity B26 Natural Gas is designed for properties connected to mains natural gas. The Rinnai Infinity B26 LPG is designed for bottled LPG. Both are 26 L/min continuous-flow systems, but the burner and gas components are configured for different fuels. Natural gas and LPG versions must not be treated as interchangeable, so the correct gas type should be confirmed before ordering.
Does a Rinnai Infinity gas hot water system need electricity?
Yes. Current Rinnai Infinity B-Series continuous-flow systems require electrical power for ignition, electronic controls and fan operation. For example, the B16 and B20 list electrical consumption of approximately 68W during operation. This means the installation needs a suitable electrical supply as well as the correct natural-gas or LPG connection. Do not assume an older non-powered instantaneous gas unit can be replaced without checking electrical requirements.
Can I replace my existing hot water system with a Rinnai?
In many cases, yes. A Rinnai Hotflo electric tank can replace an existing electric storage system, an Enviroflo heat pump can replace or upgrade a suitable electric system, and a Rinnai Infinity can replace an existing compatible continuous-flow gas unit. The simplest and lowest-cost installation is generally a compliant like-for-like replacement in the existing location. Changing system type, energy source, gas capacity, electrical connection or installation location can require additional work.
Can I buy a Rinnai hot water system supply only or supplied and installed?
Yes. Supply only is available if you already have the appropriate licensed plumber, electrician or gas fitter arranged. Supplied-and-installed options are also available on selected Rinnai systems in eligible installation areas. The installation package is matched to the system type: electric storage, heat pump or continuous-flow gas. Valve kits, disposal, electrical upgrades, gas pipe upgrades, additional plumbing, drainage, relocation and difficult access may cost extra where required.
Rinnai Hot Water System Pricing FAQs
Compare current supply-only and installed-from pricing for popular Rinnai hot water systems. Each figure uses the lowest live Shopify product price plus the matching electric-storage, heat-pump or continuous-flow Basic Install price.
How much is the Rinnai 125L Electric Hot Water System?
The Rinnai 125L Electric Hot Water System is available supply only from $779 . Supply only means you are purchasing the Rinnai hot water system without installation. Supply and Basic Install is from $1,529 in eligible installation areas. The installed-from figure is the current lowest product price plus the matching electric-storage Basic Install price. Valve kits, disposal, electrical upgrades, gas supply changes, additional pipework, drainage, base work, relocation, restricted access and other non-standard requirements are extra where applicable.
How much is the Rinnai 160L Electric Hot Water System?
The Rinnai 160L Electric Hot Water System is available supply only from $919 . Supply only means you are purchasing the Rinnai hot water system without installation. Supply and Basic Install is from $1,669 in eligible installation areas. The installed-from figure is the current lowest product price plus the matching electric-storage Basic Install price. Valve kits, disposal, electrical upgrades, gas supply changes, additional pipework, drainage, base work, relocation, restricted access and other non-standard requirements are extra where applicable.
How much is the Rinnai 250L Electric Hot Water System?
The Rinnai 250L Electric Hot Water System is available supply only from $1,009 . Supply only means you are purchasing the Rinnai hot water system without installation. Supply and Basic Install is from $1,759 in eligible installation areas. The installed-from figure is the current lowest product price plus the matching electric-storage Basic Install price. Valve kits, disposal, electrical upgrades, gas supply changes, additional pipework, drainage, base work, relocation, restricted access and other non-standard requirements are extra where applicable.
How much is the Rinnai 315L Electric Hot Water System?
The Rinnai 315L Electric Hot Water System is available supply only from $1,199 . Supply only means you are purchasing the Rinnai hot water system without installation. Supply and Basic Install is from $1,949 in eligible installation areas. The installed-from figure is the current lowest product price plus the matching electric-storage Basic Install price. Valve kits, disposal, electrical upgrades, gas supply changes, additional pipework, drainage, base work, relocation, restricted access and other non-standard requirements are extra where applicable.
How much is the Rinnai 400L Electric Hot Water System?
The Rinnai 400L Electric Hot Water System is available supply only from $1,799 . Supply only means you are purchasing the Rinnai hot water system without installation. Supply and Basic Install is from $2,549 in eligible installation areas. The installed-from figure is the current lowest product price plus the matching electric-storage Basic Install price. Valve kits, disposal, electrical upgrades, gas supply changes, additional pipework, drainage, base work, relocation, restricted access and other non-standard requirements are extra where applicable.
How much is the Rinnai Infinity B16 Natural Gas Hot Water System?
The Rinnai Infinity B16 Natural Gas Hot Water System is available supply only from $969 . Supply only means you are purchasing the Rinnai hot water system without installation. Supply and Basic Install is from $1,469 in eligible installation areas. The installed-from figure is the current lowest product price plus the matching continuous-flow gas Basic Install price. Valve kits, disposal, electrical upgrades, gas supply changes, additional pipework, drainage, base work, relocation, restricted access and other non-standard requirements are extra where applicable.
How much is the Rinnai Infinity B20 LPG Gas Hot Water System?
The Rinnai Infinity B20 LPG Gas Hot Water System is available supply only from $1,139 . Supply only means you are purchasing the Rinnai hot water system without installation. Supply and Basic Install is from $1,639 in eligible installation areas. The installed-from figure is the current lowest product price plus the matching continuous-flow gas Basic Install price. Valve kits, disposal, electrical upgrades, gas supply changes, additional pipework, drainage, base work, relocation, restricted access and other non-standard requirements are extra where applicable.
How much is the Rinnai Infinity B26 Natural Gas Hot Water System?
The Rinnai Infinity B26 Natural Gas Hot Water System is available supply only from $1,149 . Supply only means you are purchasing the Rinnai hot water system without installation. Supply and Basic Install is from $1,649 in eligible installation areas. The installed-from figure is the current lowest product price plus the matching continuous-flow gas Basic Install price. Valve kits, disposal, electrical upgrades, gas supply changes, additional pipework, drainage, base work, relocation, restricted access and other non-standard requirements are extra where applicable.
How much is the Rinnai Enviroflo V2 250L Heat Pump Hot Water System?
The Rinnai Enviroflo V2 250L Heat Pump Hot Water System is currently listed supply only from $3,799 . Supply only means you are purchasing the Rinnai hot water system without installation. This model is currently unavailable, so an installed-from price is not shown until product availability returns. Valve kits, disposal, electrical upgrades, gas supply changes, additional pipework, drainage, base work, relocation, restricted access and other non-standard requirements are extra where applicable.
How much is the Rinnai Enviroflo GR-Series 300L Heat Pump Hot Water System?
The Rinnai Enviroflo GR-Series 300L Heat Pump Hot Water System is available supply only from $4,569 . Supply only means you are purchasing the Rinnai hot water system without installation. Supply and Basic Install is from $4,944 in eligible installation areas. The installed-from figure is the current lowest product price plus the matching heat pump Basic Install price. Valve kits, disposal, electrical upgrades, gas supply changes, additional pipework, drainage, base work, relocation, restricted access and other non-standard requirements are extra where applicable.