Best Gas Storage Hot Water Systems in 2024: Reliable Choices for Australian Homes

Gas storage hot water systems remain a practical choice for many Australian homes, especially where the property already has natural gas or LPG and the existing setup suits a straightforward replacement.

While heat pumps and instant gas systems are becoming more popular, gas storage hot water still has a place. It can suit households that want stored hot water ready to use, strong recovery, familiar operation and a practical replacement option for older outdoor gas storage units.

This guide compares some of the best gas storage hot water systems for 2024, including Rheem, AquaMAX, Dux, Vulcan and Rinnai options. It also explains what matters most before choosing a system, including capacity, recovery, warranty, efficiency, running costs and whether gas storage is still the right choice for your home.

Quick answer

The best gas storage hot water system for 2024 depends on household size, budget, gas type, installation location and hot water demand.

For larger homes and heavy hot water use, the Rheem Stellar and AquaMAX G390SS are strong premium options. For practical value, Vulcan gas storage systems can suit smaller to medium households. Dux Prodigy and Rinnai Hotflo models are also worth comparing depending on capacity, warranty and site suitability.

If you are replacing an old gas storage system, JR Gas & Water can help compare gas storage hot water systems, instant gas hot water systems, heat pump hot water systems, and hot water repairs and servicing.

What is a gas storage hot water system?

A gas storage hot water system heats and stores hot water in a tank, ready for use when taps, showers or appliances need it.

Unlike instant gas hot water, which heats water as it flows through the unit, gas storage keeps a set volume of water hot inside the cylinder. When hot water is used, the system refills and reheats the tank.

Gas storage hot water can suit:

• homes already using gas storage

• households wanting a like-for-like replacement

• properties with natural gas or LPG

• homes with moderate to high hot water use

• customers who prefer stored hot water

• rental properties needing a practical replacement

• homes where instant gas conversion may require extra gas work

It may not suit:

• homes trying to reduce gas use

• households wanting the lowest possible running costs

• properties better suited to heat pump hot water

• homes with limited outdoor installation space

• households that regularly run out of stored hot water

• installations where the existing gas setup is non-compliant or unsuitable

The best result comes from matching the system to the home, not just choosing the biggest tank or most recognisable brand.

Best gas storage hot water systems for 2024

Best Premium Performer: Rheem Stellar

The Rheem Stellar is one of the best-known premium gas storage hot water systems in Australia. It is often chosen for larger households that want strong hot water recovery, high output and a proven hot water brand.

Best for

• larger households

• homes with high hot water demand

• families using multiple showers

• customers wanting a premium gas storage option

• homes where strong recovery matters

• customers who value established brand support

Why it ranks highly

The Rheem Stellar has long been known as a high-performance gas storage system. It is designed to deliver strong hot water recovery, making it a good fit for homes that need more hot water over a shorter period.

For households that want gas storage and do not want to move to instant gas or heat pump, the Stellar is one of the stronger premium options.

Things to consider

Premium gas storage usually costs more upfront than basic gas storage units. It may also be more system than a smaller household needs.

If the home has low to moderate demand, a more affordable gas storage model may be enough. If the goal is maximum efficiency and lower long-term running cost, it is also worth comparing heat pump hot water systems.

Best Stainless Steel Gas Storage Option: AquaMAX G390SS

The AquaMAX G390SS is another strong premium option, especially for customers who value high first-hour delivery, stainless steel cylinder construction and strong hot water performance.

Best for

• larger families

• homes with high peak demand

• customers wanting stainless steel cylinder construction

• homes needing strong first-hour hot water delivery

• customers comparing premium gas storage systems

• households wanting strong recovery performance

Why it ranks highly

The AquaMAX G390SS is known for strong delivery and durable construction. It can suit households that need a lot of hot water without moving to a continuous flow system.

For larger homes, the main advantage is performance. If multiple people are showering, using the kitchen and running hot water during peak periods, a higher-output gas storage system can make a noticeable difference.

Things to consider

AquaMAX premium systems can sit at the higher end of the gas storage market. They can be excellent when the household genuinely needs that output, but they may not be necessary for smaller homes.

Best Family Gas Storage Option: Dux Prodigy

The Dux Prodigy range is a strong gas storage option for households wanting a balance of performance, warranty and everyday reliability.

Best for

• family homes

• customers comparing Rheem, Dux and Vulcan

• homes wanting a practical gas storage replacement

• households with moderate to strong hot water demand

• customers wanting a mainstream Australian hot water brand

Why it ranks highly

The Dux Prodigy range has built a reputation as a practical gas storage option for everyday households. Depending on the model, it can suit customers who want more performance than an entry-level system without necessarily jumping to the highest-priced premium units.

It is a good comparison point for homeowners choosing between the major gas storage brands.

Things to consider

The right Dux Prodigy model depends on capacity and household demand. A system that is too small can run out during peak use, while a system that is too large may not be the best value.

Best Value Gas Storage Replacement: Vulcan Freeloader / Vulcan 4-Star Range

Vulcan gas storage systems are often a sensible value choice for homeowners who want a straightforward replacement without premium pricing.

JR Gas & Water stocks the Vulcan 4-Star 135L Gas Hot Water System, which can be a practical option for smaller to medium households replacing a similar outdoor gas storage system.

Best for

• smaller to medium households

• rental properties

• like-for-like gas storage replacements

• budget-conscious owners

• homes already using outdoor gas storage

• natural gas or LPG applications where the correct model is selected

Why it ranks highly

Vulcan’s main strength is value. It gives many households a simple gas storage replacement pathway without needing to pay for a premium system.

For landlords and homeowners replacing an older storage unit, this can be a practical choice when the existing location, capacity and gas supply are suitable.

Things to consider

Vulcan may not be the best option for large families or heavy hot water use. A 135L gas storage system can suit the right home, but if the household regularly runs out of hot water, simply replacing it with the same size may not solve the issue.

If you are unsure, compare the Vulcan 135L against larger gas storage hot water systems or alternative system types.

Best Multi-Tap Gas Storage Option: Rinnai Hotflo

The Rinnai Hotflo range is another well-known gas storage option, often considered by homeowners who want a recognisable brand and stored hot water performance.

Best for

• households wanting a mainstream brand

• families comparing gas storage options

• homes with moderate hot water demand

• customers wanting an alternative to Rheem or Dux

• properties where gas storage is still the preferred system type

Why it ranks highly

Rinnai is strongly associated with gas hot water in Australia. While many people know Rinnai for continuous flow systems, its storage options can also suit customers who prefer a tank-style setup.

For households comparing gas storage brands, the Hotflo range is worth including in the shortlist.

Things to consider

As with all gas storage systems, sizing matters. The right model depends on how much hot water the household uses during peak periods.

Quick comparison: 2024 gas storage hot water picks

What size gas storage hot water system do you need?

Capacity is one of the most important decisions when choosing gas storage hot water.

A system that is too small can run out during peak times. A system that is too large may cost more than necessary and may not be the best long-term value.

General guide

• 135L gas storage can suit many smaller to medium households

• 160L to 170L gas storage can suit households with stronger demand

• High-recovery systems may suit larger families better than basic storage models

• Larger first-hour delivery can matter more than tank size alone

The right choice depends on:

• number of people in the home

• number of bathrooms

• shower length

• morning and evening usage patterns

• whether multiple taps run together

• laundry and kitchen hot water use

• whether the current system runs out

• whether the home uses natural gas or LPG

If the current system runs out of hot water often, replacing it with the same size may not be the best decision.

Gas storage vs instant gas hot water

Gas storage and instant gas hot water both use gas, but they work differently.

A gas storage system heats and stores water in a tank. An instant gas hot water system heats water as it flows through the unit.

Gas storage may suit you if:

• you already have gas storage

• you want a simple replacement

• the existing location suits a storage unit

• you prefer stored hot water

• gas pipe sizing may not suit a high-flow instant unit

• you want a lower-complexity replacement

Instant gas may suit you if:

• you want continuous hot water

• you want a wall-mounted system

• space is limited

• the gas supply can support the unit

• you do not want stored water sitting in a tank

• the existing continuous flow system is due for replacement

Instant gas is not automatically better. If the gas line is undersized or the installation is complex, converting from storage to instant can cost more than expected.

Gas storage vs heat pump hot water

This is becoming one of the most important comparisons for Australian homeowners.

A heat pump hot water system uses electricity and ambient air to heat stored water efficiently. It can be a strong replacement option for homeowners wanting to reduce gas use or lower running costs.

Gas storage may suit you if:

• the home already has gas storage

• you want a straightforward replacement

• upfront cost matters

• you prefer a familiar system

• the property is a rental

• the current gas setup is suitable

Heat pump hot water may suit you if:

• you want better energy efficiency

• you have solar PV

• you want to reduce gas use

• the home has suitable outdoor space

• you are replacing an old electric or gas system

• long-term running cost matters more than lowest upfront cost

For many Brisbane and Gold Coast homes, it is worth comparing both before replacing an old gas storage unit.

Key factors to compare before buying

1. Energy efficiency

Energy efficiency affects long-term running costs.

Gas storage systems are usually rated by star rating. A higher star rating generally means lower gas use for the same amount of hot water, but real-world running costs still depend on household use, gas pricing and system size.

2. Recovery rate

Recovery rate is how quickly the system can reheat water after hot water has been used.

This matters for larger families. A system with strong recovery may perform better during busy periods than a lower-output system with similar storage volume.

3. First-hour delivery

First-hour delivery measures how much hot water the system can supply in the first hour of use.

For families, this can be more useful than simply looking at tank size. A system with strong recovery and high first-hour delivery can often handle peak demand better.

4. Capacity

Capacity needs to suit household use.

A 135L unit might be fine for some homes but frustrating in others. A larger or higher-recovery system may be needed if the home has multiple bathrooms or heavy shower demand.

5. Natural gas vs LPG

Gas storage systems may be available in natural gas or LPG models.

Make sure the correct gas type is selected. Natural gas and LPG systems are not the same and should not be treated as interchangeable without the correct model or approved conversion process.

6. Warranty

Warranty matters, but it should be read carefully.

Look at:

• cylinder warranty

• parts warranty

• labour warranty

• warranty conditions

• water quality requirements

• installation requirements

• servicing requirements

A long cylinder warranty does not always mean every part is covered for the same period.

7. Installation requirements

A gas storage replacement may be simple or complex depending on the property.

Installation can be affected by:

• unit location

• outdoor or internal setup

• gas type

• pipework

• valves

• drainage

• support base

• clearances

• access

• whether the old installation is compliant

• whether the system is being relocated

If the current installation is old, non-compliant or difficult to access, it is better to request a custom quote.

Brisbane and Gold Coast installation considerations

Gas storage hot water systems are common across Brisbane, Logan, Ipswich, Redlands, Moreton Bay and the Gold Coast, especially in homes with existing natural gas or LPG.

Local installation conditions can vary widely.

Common local factors include:

• older outdoor gas storage units with ageing valves

• rental properties needing practical replacement options

• high water pressure requiring control

• tight side access

• rusted bases or poor drainage

• LPG systems on acreage or semi-rural properties

• coastal corrosion around Gold Coast homes

• older homes with non-compliant hot water locations

• homes considering a move from gas to heat pump

This is why it is important to choose the system and the installation package together. A good product can still perform poorly if it is undersized or installed in the wrong setup.

What can go wrong if the wrong system is chosen?

Choosing the wrong gas storage hot water system can create ongoing issues.

Common problems include:

• running out of hot water

• poor recovery after showers

• high gas bills

• pilot light issues

• repeated faults

• poor performance in larger households

• choosing LPG when natural gas is needed, or vice versa

• installing a system too close to obstructions

• replacing like-for-like when the old system was already undersized

• spending more than needed on a system that does not suit the home

Many of these problems can be avoided with proper sizing and site assessment before ordering.

What you can check before booking

Before requesting a quote or ordering a replacement, gather a few details.

Helpful information includes:

• photos of the current hot water system

• model number and brand

• system size

• gas type: natural gas or LPG

• number of people in the home

• number of bathrooms

• whether hot water runs out

• whether multiple showers run at once

• whether the unit is external or internal

• photos of pipework, valves and surrounding area

• suburb and access details

This helps JR Gas & Water recommend the right product and installation approach.

Cost factors for gas storage hot water systems

The installed cost of a gas storage hot water system can vary depending on the product and the site.

Cost can be affected by:

• selected brand and model

• storage capacity

• natural gas or LPG

• like-for-like replacement vs relocation

• valve upgrades

• gas pipework changes

• water pipe alterations

• drainage requirements

• support base or slab requirements

• old system removal

• access

• urgency

• whether extra compliance work is needed

For clearer pricing, start with service work pricing, browse gas storage hot water systems, or request a quote for non-standard work.

Maintenance tips for gas storage hot water systems

Gas storage systems need basic maintenance to stay safe and reliable.

Good maintenance includes:

• keeping the area around the system clear

• checking for visible leaks

• checking for rust or corrosion

• watching for pilot light problems

• arranging professional servicing when needed

• not ignoring noisy operation

• checking for water around the base

• not covering or enclosing outdoor units

• having gas issues checked by a licensed gas fitter

Do not open or modify gas components yourself. Gas fitting work should always be handled by a licensed gas fitter.

When should you repair instead of replace?

Replacement is not always necessary.

Repair may make sense if:

• the system is not too old

• the fault is minor

• parts are available

• the tank is not leaking

• the repair cost is reasonable

• the system still suits the household

Replacement may make sense if:

• the tank is leaking

• the system is very old

• faults keep returning

• the household runs out of hot water

• the system is badly corroded

• parts are difficult to source

• the existing unit is undersized

• a different system type would be better

JR Gas & Water can help with hot water repairs and servicing or replacement advice if your current system is no longer worth repairing.

What JR Gas & Water can help with

JR Gas & Water helps homeowners, landlords, property managers and businesses compare, repair, replace and install hot water systems across Brisbane, the Gold Coast and nearby South East Queensland areas.

Depending on the job, JR Gas & Water can help with:

• gas storage hot water systems

• Vulcan 4-Star 135L gas hot water installation

• instant gas hot water systems

• hot water repairs and servicing

• electric hot water systems

• heat pump hot water systems

• solar hot water systems

• gas fitting

• gas storage replacement advice from photos

• natural gas and LPG system selection

• custom quotes for non-standard installations

Related JR Gas & Water services

• Gas Storage Hot Water Systems

• Vulcan 4-Star 135L Gas Hot Water System

• Instant Gas Hot Water Systems

• Hot Water Repairs and Servicing

• Heat Pump Hot Water Systems

• Electric Hot Water Systems

• Solar Hot Water Systems

• Gas Fitting

• Service Work Pricing

• Request a Quote

FAQs

What is the best gas storage hot water system in 2024?

For many larger homes, the Rheem Stellar and AquaMAX G390SS are strong premium options. For family homes, Dux Prodigy and Rinnai Hotflo models are worth comparing. For smaller to medium homes and rental properties, Vulcan gas storage systems can offer practical value.

The best system depends on household size, gas type, budget, installation location and hot water demand.

Is Rheem Stellar better than AquaMAX G390SS?

Both are strong premium gas storage systems. Rheem Stellar is known for high performance and strong recovery, while AquaMAX G390SS is known for stainless steel cylinder construction and strong hot water delivery.

The better option depends on the home, budget, installation requirements and household usage.

Is gas storage hot water still worth buying?

Yes, gas storage hot water can still be worth buying if the property already has a suitable gas storage setup and the owner wants a straightforward replacement.

However, it is worth comparing instant gas and heat pump options before replacing an old system, especially if running costs or long-term efficiency are important.

Is instant gas better than gas storage?

Instant gas can be better for continuous hot water and compact wall-mounted installation. Gas storage can be better for simple like-for-like replacements and homes where the current gas setup suits a storage unit.

The right choice depends on gas supply, household demand, budget and installation complexity.

What size gas storage hot water system do I need?

Smaller households may suit a 135L gas storage system, while larger families may need a 160L to 170L system or a high-recovery premium model.

The right size depends on number of occupants, number of bathrooms, shower habits and whether multiple hot water outlets run at once.

Should I replace gas storage with a heat pump?

A heat pump may be worth considering if you want better energy efficiency, have suitable outdoor space, use solar PV, or want to reduce gas use.

Gas storage may still be better if you want a simpler lower-upfront-cost replacement and the existing gas setup is suitable.

Can gas storage hot water be installed inside?

Some gas storage systems may have internal installation options, but they require correct flueing, ventilation, clearances and compliance.

Many online replacement packages are for external installations only. If your current system is internal or enclosed, request a custom quote before ordering.

Need help choosing a gas storage hot water system?

If your old gas storage hot water system is leaking, unreliable, undersized or due for replacement, JR Gas & Water can help you compare suitable options for your home.

Browse gas storage hot water systems, compare instant gas hot water, or send photos and model details through for a custom recommendation.

Request a quote from JR Gas & Water