16L Instant Gas Hot Water Systems Australia
Our Top 3 Instant Gas 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.
16L Instant Gas Hot Water Systems for Brisbane, Gold Coast & Major Australian Metros
16L instant gas hot water systems, also known as 16L continuous-flow gas water heaters, provide compact on-demand hot water for homes with relatively low simultaneous hot-water demand.
They are commonly considered for one-bathroom homes, units, townhouses, granny flats, couples, smaller rental properties and like-for-like replacement of an existing 16L continuous-flow system.
Installed Today supplies 16L instant gas systems across supported mainland Australian markets, with supplied and installed options available on selected systems in eligible Brisbane and Gold Coast service areas.
What Is a 16L Instant Gas Hot Water System?
How Does a 16L Continuous-Flow Gas System Work?
When a hot tap is opened, water begins flowing through the appliance and the gas burner activates.
The water passes through a heat exchanger and is heated before leaving the unit for the shower, basin, kitchen or other hot-water outlet.
Unlike gas storage, the appliance does not keep a large cylinder of heated water ready between uses.
Who Should Consider a 16L Instant Gas System?
One-Bathroom Homes
16L is most naturally suited to homes where simultaneous high-flow hot-water use is limited.
Units & Townhouses
The compact wall-mounted design can work well where outdoor space is limited.
Granny Flats
A smaller dwelling with one bathroom and moderate demand can be a good application for 16L continuous flow.
Couples & Smaller Households
Lower simultaneous demand can allow a 16L system to comfortably meet normal residential use.
Rental Properties
16L can provide a practical replacement where the dwelling has modest occupancy and an existing continuous-flow setup.
Existing 16L Replacement
If the old 16L unit has always supplied enough hot water, another compatible 16L model is the logical starting point.
Does 16L Mean You Always Get 16 Litres Per Minute?
No. The 16L designation is a nominal flow class measured under specified operating conditions.
For example, current Rinnai B16 and Rheem 16L models publish 16L/min at a 25°C temperature rise.
If incoming water is colder or the desired outlet temperature is higher, the system needs to add more heat to each litre of water and the available flow can reduce.
Why Temperature Rise Matters with 16L Instant Gas
Temperature rise is the difference between the incoming cold-water temperature and the required heated-water temperature.
If incoming water is 20°C and the appliance needs to produce 45°C water, the required rise is 25°C.
Colder incoming water creates a greater temperature rise and can reduce the flow the appliance can provide at the required outlet temperature.
Which Instant Gas Flow Rate Should You Choose?
| Flow Class | Typical Starting Point | Common Application | Main Question |
|---|---|---|---|
| 16L | Lower demand | One bathroom, compact homes, limited simultaneous use | Will one major hot-water outlet usually run at a time? |
| 20L | Small-to-medium demand | More regular household use and additional flow buffer | Does the home need more capacity than 16L provides? |
| 26L | Family / stronger demand | Higher peak flow and more simultaneous-use potential | Can the property's gas and water supply support it? |
When Should You Move from 16L to 20L?
A 20L unit is worth comparing when the existing 16L system feels marginal during normal use.
This may occur after household occupancy increases, shower demand rises, or another hot-water outlet is regularly used while a shower is operating.
Do not automatically upsize without checking the gas supply. A larger continuous-flow unit can require greater gas capacity.
Why 26L Is Not Automatically Better Than 16L
26L provides substantially more nominal flow, but a larger appliance is only useful when the household needs that flow and the property's services can support it.
For a small one-bathroom home where hot water is normally used one outlet at a time, a correctly selected 16L system can remain the more practical replacement.
Larger units can also increase gas-supply requirements and installation complexity.
16L Natural Gas vs LPG Instant Hot Water
Natural Gas
Designed for properties connected to a suitable mains Natural Gas supply.
LPG
Designed for properties using bottled or bulk LPG rather than mains Natural Gas.
Do Not Guess
Natural Gas and LPG appliances are different configurations. Confirm the fuel type before ordering.
Rinnai & Rheem 16L Instant Gas Systems
The valid 16L systems currently shown in the live child collection are Rinnai Infinity B16 Natural Gas, Rinnai Infinity B16 LPG, Rheem 16 Natural Gas and Rheem 16 LPG.
These provide both Natural Gas and LPG choices from two established continuous-flow hot-water brands.
Compare flow specification, dimensions, gas input, controls, warranty, connection layout and replacement compatibility rather than selecting from brand alone.
Rinnai Infinity B16 Continuous Flow
The Rinnai Infinity B16 is available in Natural Gas and LPG versions.
Current specifications list 16L/min at a 25°C rise and approximately 20L/min at a 20°C rise.
Rinnai positions the B16 toward one-bathroom homes and moderate hot-water demand, making it well aligned with the intent of this collection.
Rheem 16L Continuous Flow Hot Water
Rheem's current 16L model is available in Natural Gas and LPG configurations.
The live product specification lists 16L/min at a 25°C temperature rise, a compact wall-mounted design and a factory temperature-limited 50°C version.
It can suit smaller homes, townhouses, apartments, granny flats and like-for-like replacement of compatible external continuous-flow units.
Bosch HydroPower 16H as an Alternative 16L System
Installed Today's broader instant-gas range also includes Bosch HydroPower 16H in Natural Gas and LPG versions.
The Bosch 16H delivers 16L/min at a 25°C rise and uses water-flow energy to provide ignition.
Unlike common electronically ignited continuous-flow systems, HydroPower does not require a standard power point at the unit, making it a useful comparison where the installation suits that technology.
Check the Gas Supply Before Installing a 16L System
Continuous-flow systems can require substantial gas input while the burner is operating.
Existing gas pipework needs to provide enough capacity for the hot-water system plus any other gas appliances that may operate at the same time.
Pipe diameter, pipe length, regulator capacity, gas pressure and total connected gas load all matter.
Water Pressure and Flow Need to Suit the Appliance
A 16L rating does not mean the system can create 16L/min from a property that cannot supply enough water.
Incoming water pressure and available flow need to meet the manufacturer's requirements.
Existing pressure restrictions, pipework problems or low incoming flow should be investigated rather than assuming a larger hot-water unit will solve them.
Does a 16L Instant Gas System Need Electricity?
Many modern continuous-flow gas systems use electricity for ignition, controls and electronic operation even though gas provides the heat.
Rinnai and Rheem replacements therefore need the required electrical supply checked as part of installation.
Bosch HydroPower is different because its ignition system can operate without a standard power point at the appliance.
Most 16L Residential Systems Are External Wall-Mounted Units
The common 16L models in this range are designed around compact external wall installation.
The final position needs compliant clearances from windows, doors, openings and other building features together with suitable access to gas, water and electricity where required.
Do not assume an external appliance can be installed inside a cupboard or enclosed room.
Replacing an Existing 16L Instant Gas System
If the existing 16L system has consistently provided enough hot water, staying within the same flow class is usually the simplest sizing starting point.
- Existing brand and model
- Natural Gas or LPG
- Existing flow rate
- Gas pipe sizing
- Regulator capacity
- Water pressure
- Connection locations
- Unit dimensions
- Wall mounting
- Electrical supply
- Installation clearances
- Current household demand
Changing from Gas Storage to 16L Continuous Flow
A 16L wall-mounted appliance can remove the need for a large gas-storage cylinder, but the conversion is not automatically a simple replacement.
Gas-storage and continuous-flow appliances can have very different gas input, wall-mounting, plumbing and electrical requirements.
The conversion may require gas-pipe upgrades, new mounting, plumbing changes, electrical work, disposal and other compliance work.
16L Instant Gas for Granny Flats, Units and Smaller Homes
Compact dwellings are one of the strongest use cases for 16L continuous flow because demand is often centred around a single bathroom.
The wall-mounted appliance also avoids dedicating floor space to a large storage tank.
The property still needs a suitable gas supply, water pressure, compliant external location and electrical connection where required.
16L Instant Gas for Rental Properties
A 16L system can provide a practical rental-property replacement where expected occupancy and bathroom demand remain modest.
If the property can reasonably accommodate a larger household, size the system around realistic tenant use rather than automatically choosing the smallest continuous-flow model.
16L Instant Gas Hot Water Systems Brisbane
Brisbane is a primary 16L continuous-flow installation market for Installed Today. Selected systems can be ordered with professional installation in eligible Brisbane, Logan, Ipswich, Moreton Bay and Redlands service areas.
Common Brisbane applications include existing 16L replacements, units, townhouses, granny flats, rental properties and smaller one-bathroom homes.
Final installation requirements depend on gas type, gas supply, water pressure, wall location, electrical supply, pipework, clearances and site conditions.
16L Instant Gas Hot Water Systems Gold Coast
Selected 16L instant gas hot water systems are also available supplied and installed across eligible Gold Coast service areas.
They can suit smaller homes, units, townhouses and replacement jobs where one bathroom and lower simultaneous hot-water demand make 16L an appropriate flow class.
Confirm Natural Gas or LPG, gas-pipe capacity, water pressure and installation suitability before ordering.
Buy 16L Instant Gas Hot Water Systems Across Major Australian Metros
Supply-only 16L continuous-flow systems are available for customers who already have appropriately licensed trades arranged across supported mainland Australian markets.
Our main 16L instant-gas markets include Brisbane, Gold Coast, Sunshine Coast, Sydney, Melbourne, Perth and Adelaide, together with 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
Supply Only
Choose supply only if you already have an appropriately licensed gas fitter or plumber arranged and simply need the 16L system supplied.
Installation, gas work, electrical work, valves, mounting, pipework changes, disposal and compliance upgrades are not included unless specifically shown.
Brisbane Installation
Selected 16L instant-gas systems are available with installation in eligible Brisbane metro service areas.
Availability depends on model, fuel type, postcode, gas supply, water pressure, electrical requirements and site conditions.
Gold Coast Installation
Selected 16L systems are also available supplied and installed in eligible Gold Coast areas.
Final requirements depend on the chosen appliance and existing continuous-flow installation.
Choose 16L When Simultaneous Hot-Water Demand Is Low
The key question with 16L continuous flow is not simply how many people live in the home. It is how much hot water the property needs at the same time.
Compare bathrooms, simultaneous outlets, temperature rise, Natural Gas or LPG, gas-pipe capacity, water pressure, electrical requirements, appliance dimensions, controls and replacement compatibility before ordering.
If the existing 16L unit has comfortably supplied the property and household demand has not increased, another correctly selected 16L system remains the strongest sizing starting point.
16L Instant Gas Hot Water System FAQs
Common questions about choosing, ordering and installing 16L instant gas hot water systems for homes using natural gas or LPG.
What is a 16L instant gas hot water system best suited for?
A 16L instant gas hot water system is best suited to smaller homes, units, granny flats and low-to-moderate hot water demand. It is commonly used where a compact continuous flow gas system is needed for one bathroom or lighter household use.
How many people does a 16L instant gas hot water system suit?
A 16L instant gas hot water system commonly suits around 1 to 2 people, depending on shower flow rate, number of bathrooms, climate, gas supply, water pressure and household habits. Larger homes or multiple bathrooms may need to compare higher-flow continuous flow systems.
What does 16L mean on an instant gas hot water system?
16L refers to the hot water flow rate category of the unit. It gives an indication of how much hot water the system can deliver per minute under suitable conditions. Actual performance can depend on incoming water temperature, gas supply, water pressure and installation setup.
What is the difference between natural gas and LPG 16L models?
Natural gas and LPG models are made for different gas supplies. A natural gas unit is for homes connected to mains gas, while an LPG unit is for homes using bottled gas. The correct gas type must be selected before ordering because LPG and natural gas units are not interchangeable without the correct manufacturer-approved setup.
What is a hydropowered 16L gas hot water system?
A hydropowered 16L gas hot water system uses water flow to help power ignition rather than relying on a standard external power point. It can be useful in suitable locations where a conventional plugged-in continuous flow unit is not ideal, but the model still needs to suit the property, gas type and installation requirements.
Can I buy a 16L instant gas hot water system supply only?
Yes. Choose supply only if you already have a licensed plumber or gas fitter arranged. Supply-only pricing is for the hot water system only and does not include installation, valves, old unit removal, disposal, gas work, electrical work, pipework changes, power point installation, controller wiring or compliance upgrades unless selected separately.
Can I order a 16L instant gas hot water system supplied and installed?
Yes. Supplied and installed options are available for selected 16L instant gas hot water systems in eligible Brisbane and Gold Coast service areas. Availability depends on your location, access, gas type, existing setup, gas compliance requirements, electrical requirements and site conditions.
Can I replace an old gas hot water system with a 16L instant gas unit?
In many cases, a 16L instant gas hot water system can replace an older gas unit, but the new system still needs to suit the existing location, gas supply, water pressure, pipe sizing, clearances, ventilation, electrical setup and current compliance requirements.
Are 16L instant gas hot water systems installed indoors?
Standard external 16L instant gas hot water systems are designed for outdoor installation. Do not assume a gas unit can be installed internally unless it is a manufacturer-approved internal or flued model and the installation meets all required ventilation, flueing and compliance requirements.
Where can a 16L instant gas hot water system be installed?
A 16L instant gas hot water system needs a suitable outdoor location with safe access, compliant plumbing, drainage, gas connection, clearances and ventilation. Some models may also need a suitable power point unless they are hydropowered or otherwise designed for a different ignition setup.
Does installation include gas work?
Gas work is not automatically included unless shown in the selected installation option or chosen as an add-on. Some replacements may require gas compliance checks, regulator work, pipework changes, isolation valves, gas sizing upgrades or other work by a licensed gas fitter.
Does installation include electrical work or a power point?
Electrical work and power point installation are not automatically included unless shown in the selected installation option or chosen as an add-on. Some continuous flow gas systems require a nearby compliant power point, while hydropowered models may have different requirements.
Does installation include old system removal and disposal?
Old system removal and disposal are not automatically included unless shown in the selected installation option or chosen as an add-on. Access, location, mounting, stairs, pipework and site conditions can affect what is required.
Is a 16L instant gas hot water system the same as gas storage?
No. A 16L instant gas hot water system is a continuous flow unit that heats water as it passes through the system. A gas storage hot water system heats and stores hot water inside a tank. The right choice depends on household demand, gas supply, space, installation setup and how the hot water is used.
Do you install 16L instant gas hot water systems in Brisbane and the Gold Coast?
Supplied and installed options are available in eligible Brisbane and Gold Coast service areas. Availability depends on the selected product, your address, gas type, access, existing system and installation requirements.