Best Hot Water System for Homes With LPG: Complete Buyer’s Guide

Jun 26, 2026

If your home uses LPG bottles, the best hot water system may be an LPG instant gas system, LPG gas storage system, electric storage system or heat pump hot water system, depending on your household size, number of bathrooms, gas bottle setup, gas supply capacity, water pressure, available location, electrical setup and budget.

At Hot Water Outlet, you can compare gas hot water systems, instant gas hot water systems, hot water systems, electric hot water systems, heat pump hot water systems and common valves, pipework and fittings.

Quick Answer: What Is the Best Hot Water System for LPG Homes?

For many LPG homes, the best hot water system is either an LPG instant gas system or an LPG gas storage system, provided the gas bottle setup, regulator, gas pipe sizing, water pressure and installation location are suitable.

As a general guide:

Choose an instant gas hot water system if you want continuous flow hot water and the LPG supply, water pressure and external location are suitable.
Choose a gas hot water system if you want a gas storage-style replacement and the tank capacity or recovery rate suits your household.
Compare electric hot water systems if LPG supply, bottle costs or gas upgrades make electric storage more practical.
Compare heat pump hot water systems if you want efficient electric hot water and the property has suitable outdoor space, airflow, drainage and electrical setup.
Confirm the product is LPG, not natural gas.
Check gas bottle supply, regulator setup, water pressure, flow rate, product location and required fittings before ordering supply-only.

LPG can work well for hot water, but the selected model must be suitable for LPG and the property must support the system.

Best Hot Water Options for LPG Homes at a Glance

System Type	May Suit	Watch Out For
LPG instant gas hot water	Homes wanting continuous flow hot water	LPG bottle supply, regulator, gas pipe sizing, L/min flow rate, water pressure
LPG gas storage hot water	Homes replacing tank-style LPG systems	Tank capacity, recovery rate, LPG compatibility, dimensions
Electric storage hot water	Homes moving away from LPG or wanting a simple tank option	Electrical requirements, tank size, running schedule
Heat pump hot water	Homes wanting efficient electric hot water where site conditions suit	Outdoor airflow, noise, drainage, tank capacity
Instant electric hot water	Selected applications only	Electrical capacity, flow demand, switchboard suitability

For many LPG homes, the main choice is LPG instant gas vs LPG gas storage. Electric and heat pump options are worth comparing if LPG is no longer the most practical choice.

Start With Your Current Hot Water System

Before choosing a replacement, check what is already installed.

Look for:

Current brand and model
System type
LPG or natural gas
Tank capacity in litres if storage
Flow rate in L/min if instant gas
Indoor, outdoor or flued setup
Product dimensions
Connection positions
LPG bottle location
Regulator setup
Whether the system keeps up
Whether it runs cold during peak use
Whether the household size has changed
Whether the current location still works
Whether valves and fittings need replacing

If your current LPG hot water system has worked well, a similar LPG replacement may be practical.

If it struggles during peak use, runs cold, uses too much gas or no longer suits the household, compare different sizes or alternative system types before ordering.

LPG vs Natural Gas: Do Not Mix Them Up

Before ordering any gas hot water system, confirm that the model is suitable for LPG.

LPG and natural gas are not interchangeable.

An LPG hot water system cannot simply be used on natural gas unless the specific model is designed and approved for that gas type. The same applies in reverse.

Before ordering, check:

Existing hot water unit label
Appliance data plate
LPG bottle setup
Product listing
Gas type shown on the model
Licensed gas fitter advice if unsure

Choosing the wrong gas type can cause delays, extra costs and compatibility issues.

LPG Instant Gas Hot Water Systems

LPG instant gas hot water systems heat water as it passes through the unit. They do not store a large tank of hot water.

An LPG instant gas system may suit if:

You want continuous flow hot water
LPG bottles are already used at the property
LPG supply can support the selected unit
Water pressure and flow are suitable
External wall location is practical
You want a compact hot water system
The correct L/min flow rate is selected

Before choosing LPG instant gas, check:

Required flow rate in L/min
Number of people in the home
Number of bathrooms
Whether two showers may run close together
Bath use
LPG bottle setup
Regulator suitability
Gas pipe sizing
Water pressure and flow
External wall location
Clearances from windows and openings
Controller compatibility where relevant
Product dimensions
Required valves and fittings

Browse instant gas hot water systems if you want to compare LPG continuous flow options.

LPG Gas Storage Hot Water Systems

LPG gas storage hot water systems heat and store water in a tank.

LPG gas storage may suit if:

You are replacing an existing LPG storage system
You prefer a tank-style hot water system
The current storage setup has worked well
Tank capacity suits household demand
Recovery rate suits peak use
Product dimensions fit the existing location
LPG bottles are already in use

Before choosing LPG gas storage, check:

Tank capacity
Recovery rate
Current tank size
Whether the old system runs out
Number of people in the home
Number of bathrooms
Bath use
LPG supply suitability
Product dimensions
Connection positions
Required valves and fittings

Browse gas hot water systems if you want to compare LPG storage and gas hot water options.

LPG Instant Gas vs LPG Gas Storage

Instant gas and gas storage work differently.

Option	How It Works	Best Suited To
LPG instant gas	Heats water as it flows through the unit	Homes wanting continuous flow hot water
LPG gas storage	Stores hot water in a tank	Homes wanting a tank-style LPG replacement

Instant gas is sized by flow rate in L/min.

Gas storage is sized by tank capacity and recovery rate.

Do not compare L/min and litres as if they are the same measurement. They describe different system types.

When LPG Instant Gas May Be Better

LPG instant gas may be the better option if:

Continuous flow hot water is preferred
You do not want a large storage tank
LPG bottle supply is suitable
Water pressure is suitable
External wall space is available
The selected L/min rating suits your household
You want a compact LPG hot water option

Instant gas can be a strong choice for many LPG homes, but it must be correctly sized and supported by the gas bottle setup, regulator and pipework.

When LPG Gas Storage May Be Better

LPG gas storage may be the better option if:

You are replacing an existing LPG storage unit
The current tank-style setup has worked well
You prefer stored hot water
The existing location suits a tank
Recovery rate and tank capacity suit demand
A like-for-like replacement is preferred
Instant gas supply or pressure requirements are difficult

LPG gas storage can still be practical where the home already suits this system type.

What Size LPG Instant Gas System Do You Need?

Instant gas hot water systems are sized by flow rate in L/min.

As a general guide:

Flow Rate	May Suit	Check Carefully
16 L/min	Smaller homes, one bathroom or lower-demand households	Multiple outlets may be limited
20 L/min	Moderate households or small families	Peak use may still be high
26 L/min	Larger families or two-bathroom homes	LPG supply and water pressure must be suitable

A higher L/min model may suit larger households, but it is not automatically better. The LPG supply, regulator, gas pipework and water pressure must be suitable.

What Size LPG Gas Storage System Do You Need?

Gas storage systems are sized by tank capacity and recovery rate.

Before choosing an LPG gas storage model, check:

Current tank capacity
Whether the current system keeps up
Number of people in the home
Number of bathrooms
Shower duration
Back-to-back showers
Bath use
Kitchen hot water use
Laundry use
Recovery rate
Available location

A larger tank is not the only factor. Recovery rate can also affect how well the system handles peak hot water demand.

Best LPG Hot Water System for One Bathroom

A one-bathroom LPG home may suit instant gas or gas storage depending on household demand.

Instant gas may suit if:

The household has low to moderate demand
LPG supply is suitable
Water pressure is suitable
The selected flow rate matches usage
External wall location is practical

Gas storage may suit if:

An LPG storage system is already installed
Tank capacity suits demand
Recovery rate is suitable
A tank-style replacement is preferred

A one-bathroom family home may need more hot water than a two-person household, so do not choose purely by bathroom count.

Best LPG Hot Water System for Two Bathrooms

Two-bathroom homes need more careful sizing because showers and outlets may overlap.

Instant gas may suit if:

A suitable L/min rating is selected
LPG supply can support the unit
Water pressure and flow are suitable
External location works
The household wants continuous flow hot water

Gas storage may suit if:

Tank capacity is suitable
Recovery rate matches peak use
The existing tank location works
A storage-style system is preferred

For two bathrooms, do not choose only by brand or product price. Size, LPG supply and water pressure matter more.

Best LPG Hot Water System for Families

Families usually have higher hot water demand, especially during morning and evening peaks.

For a family with LPG, compare:

Higher-flow LPG instant gas systems
LPG gas storage systems with suitable tank capacity and recovery rate
Electric or heat pump alternatives if LPG is no longer preferred

Check:

Number of people in the home
Number of bathrooms
Shower duration
Back-to-back showers
Bath use
Whether two showers may run together
Kitchen and laundry hot water use
LPG bottle supply
Regulator setup
Water pressure
Product location

A family home can still experience poor hot water performance if the system is undersized or the LPG supply is not suitable.

Best LPG Hot Water System for Small Homes

Small LPG homes may suit compact instant gas or smaller gas storage options depending on layout and demand.

Instant gas may suit if:

Demand is low to moderate
External wall space is available
LPG supply is suitable
Water pressure is suitable
A compact system is preferred

Gas storage may suit if:

A storage tank is already installed
The selected tank capacity matches demand
The existing location works
A like-for-like replacement is preferred

Small homes still need proper checks. Do not assume the smallest model is automatically the best option.

Best LPG Hot Water System for Units

Units can be more complicated because of building rules, body corporate conditions, gas bottle storage, ventilation and external location requirements.

An LPG system may suit a unit if:

The building already supports LPG hot water
LPG bottles are allowed and correctly located
Body corporate rules allow the replacement
The product location is compliant
Gas supply and water pressure are suitable
Product dimensions suit the available space
Delivery access is practical

Some units may be better suited to electric hot water if LPG replacement is difficult or approval is unclear.

For units, check building and body corporate requirements before ordering supply-only.

Best LPG Hot Water System for Townhouses

Townhouses can suit LPG hot water, but the layout needs careful checking.

Important checks include:

Side access
External wall space
LPG bottle location
Regulator location
Distance from windows and openings
Distance from bedrooms
Neighbouring properties
Body corporate or complex rules
Gas pipe sizing
Water pressure
Product dimensions

Instant gas can be practical for townhouses where external location, LPG supply and water pressure are suitable. Gas storage may suit where an existing tank-style system is already installed.

Best LPG Hot Water System for Rental Properties

Rental properties need practical hot water systems that suit likely tenant demand.

Instant gas may suit rentals if:

LPG hot water is already installed
Gas bottle supply is suitable
Water pressure is suitable
The selected L/min rating suits the property
External location works
Continuous flow hot water is preferred

Gas storage may suit rentals if:

LPG storage is already installed
Tank capacity suits the property size
Recovery rate is suitable
A straightforward replacement is preferred

Avoid undersizing rental hot water. A lower product price may create more complaints if tenants experience poor hot water performance.

Best LPG Hot Water System for Rural and Semi-Rural Homes

LPG hot water is common in homes where natural gas is not available.

An LPG system may suit rural or semi-rural homes if:

LPG bottle delivery is practical
The bottle location is compliant
The regulator setup is suitable
Gas pipework can support the appliance
Water pressure is suitable
The chosen system matches household demand
Licensed tradespeople confirm the setup

Electric storage or heat pump hot water may also be worth comparing where electricity supply, outdoor space and household demand suit.

Best LPG Hot Water System for Renovations

Renovations are a good time to reassess LPG hot water because the finished home may have higher demand than the old layout.

You may need a different system if:

A second bathroom is being added
More people will live in the home
A bath is being added
The old hot water location is changing
More gas appliances are being added
LPG bottle location is changing
Gas pipework is being upgraded
External wall space is being redesigned
Water pressure issues are being addressed

Plan hot water around the finished home, not only the old hot water system.

Best LPG Hot Water Brands

LPG hot water buyers often compare:

Rinnai, Bosch and Rheem are commonly compared for LPG instant gas.

Rheem, Dux and Vulcan are commonly compared for LPG gas storage-style hot water.

The best brand depends on system type, model size, LPG supply, water pressure and property layout.

Rinnai LPG Hot Water

Rinnai hot water systems are commonly compared for instant gas and continuous flow hot water.

Rinnai may suit LPG homes where:

Continuous flow hot water is preferred
LPG supply is suitable
Water pressure is suitable
External wall location works
The selected L/min rating suits demand
Controller compatibility is checked where relevant

Rinnai is often worth comparing if you are focused on LPG instant gas.

Bosch LPG Hot Water

Bosch hot water systems are commonly compared for gas continuous flow hot water.

Bosch may suit LPG homes where:

Instant gas is preferred
A compact external gas unit is practical
LPG supply can support the selected model
Water pressure is suitable
Product dimensions and clearances suit the location

Bosch is usually best compared within the instant gas category.

Rheem LPG Hot Water

Rheem hot water systems are commonly compared across several hot water categories, including gas storage and instant gas.

Rheem may suit buyers who want:

LPG gas storage options
LPG instant gas options
A broader hot water brand comparison
A familiar brand across electric, gas, heat pump and storage systems

Rheem can be useful if you are still deciding between gas storage, instant gas, electric or heat pump hot water.

Dux LPG Hot Water

Dux hot water systems are commonly compared for gas storage hot water.

Dux may suit LPG homes where:

A gas storage system is already installed
A tank-style replacement is preferred
Tank capacity suits household demand
Recovery rate suits peak use
Product dimensions fit the current location

Dux may be worth comparing if LPG storage gas is the right system type.

Vulcan LPG Hot Water

Vulcan hot water systems are commonly compared for practical gas storage-style replacements.

Vulcan may suit LPG homes where:

A storage-style system is preferred
Existing tank location works
Tank capacity and recovery rate suit demand
A practical replacement option is needed
Product dimensions and connection positions suit the property

Vulcan is commonly compared against Rheem and Dux for storage hot water.

LPG vs Electric Hot Water

LPG and electric hot water suit different homes.

LPG may suit if:

LPG bottles are already installed
Instant gas or gas storage is preferred
LPG supply is suitable
Water pressure is suitable for instant gas
A gas replacement is straightforward

Electric hot water systems may suit if:

You want to move away from LPG
A tank-style electric system is already installed or preferred
Electrical requirements can be met
Heat pump location is not practical
A simple storage replacement is preferred

The better choice depends on your property, energy setup and household demand.

LPG vs Heat Pump Hot Water

LPG hot water and heat pump hot water are very different options.

LPG may suit if:

Gas bottles are already available
Instant gas or gas storage suits the home
The replacement location works
Gas supply and water pressure are suitable

Heat pump hot water systems may suit if:

Efficient electric hot water is preferred
Outdoor space is available
Airflow is suitable
Condensate drainage can be managed
Noise placement is acceptable
Electrical requirements can be met

Heat pumps can be a good option for some LPG homes, especially where the household wants to reduce reliance on bottled gas, but the site still needs to suit heat pump requirements.

LPG vs Instant Electric Hot Water

Instant electric hot water may suit selected applications, but it is not automatically a direct replacement for LPG instant gas hot water.

Instant electric hot water systems may suit if:

Flow demand is modest
Electrical capacity is suitable
The system is for a suitable outlet or application
Licensed tradespeople confirm requirements

Instant electric may not suit if:

Whole-home demand is high
Multiple showers may run together
Switchboard capacity is limited
An LPG instant system is already practical
A storage or heat pump system is more suitable

Electrical requirements must be checked before ordering instant electric.

LPG Supply Requirements

LPG hot water performance depends on the gas supply.

Before choosing an LPG model, check:

LPG bottle size and setup
Bottle location
Regulator suitability
Gas pipe sizing
Distance from gas bottles to appliance
Other gas appliances
Appliance load
Licensed gas fitter advice

A larger instant gas unit may not perform properly if LPG supply, regulator or pipework is not suitable.

Water Pressure and Flow

Instant gas systems need suitable water pressure and flow.

Before choosing LPG instant gas, check:

Mains water pressure
Existing shower flow
Number of hot outlets
Whether outlets may run together
Existing pipework
Pressure limiting valves
Product specifications
Licensed plumber advice where needed

If water pressure or flow is poor, replacing the hot water system alone may not solve the issue.

External Gas Unit Location

Many instant gas systems are external units unless the specific product is designed and approved for internal or flued installation.

Before choosing an LPG instant gas system, check:

External wall location
Clearance from windows and doors
Clearance from openings
Distance to LPG supply
Distance to water connections
Access for servicing
Weather exposure requirements
Product installation requirements

Do not assume an external gas unit can be installed indoors.

Controllers and Accessories

Some instant gas systems may be compatible with temperature controllers, depending on the model.

Before ordering controllers or accessories, check:

Product compatibility
Whether controllers are included
Number of controllers supported
Controller location
Wiring requirements
Whether old controllers are compatible
Licensed trade requirements

Do not assume existing controllers will work with every new LPG hot water system.

Supply-Only Pricing vs Installed Cost

When comparing LPG hot water systems online, make sure you understand what the price includes.

Hot Water Outlet sells supply-only hot water systems and accessories online. Supply-only pricing usually does not include:

Installation
Plumbing labour
Gas fitting
Electrical work
Old unit removal
Disposal
Valves
Fittings
Pipework changes
Gas upgrades
Regulator changes
LPG bottle work
Controller wiring
Compliance upgrades
Concrete bases or platforms
Delivery beyond what is shown at checkout

Before ordering, confirm the full job requirements with appropriately licensed tradespeople.

Valves, Fittings and Accessories

An LPG hot water order may need more than the main unit.

Common accessories include:

Tempering valves
Pressure relief valves
Duo valves
Non-return valves
Isolation valves
Copper pipework
Gas fittings
Controllers where compatible
Drainage parts
Connection parts

Hot Water Outlet has a dedicated range of valves, pipework and fittings to help customers compare common hot water accessories.

Always confirm compatibility before ordering.

Common Mistakes When Choosing LPG Hot Water

Ordering Natural Gas Instead of LPG

Natural gas and LPG are not interchangeable. Confirm the correct gas type before ordering.

Choosing Brand Before System Type

Choose LPG gas storage or LPG instant gas before choosing the exact brand and model.

Choosing Flow Rate by Price Alone

A lower-flow instant gas model may not suit families, two bathrooms or overlapping showers.

Ignoring LPG Bottle Supply

Instant gas performance depends on suitable LPG bottle supply, regulator and gas pipework.

Ignoring Water Pressure

Poor water pressure can affect instant gas performance.

Comparing Storage Litres With Instant Gas L/min

Storage systems are sized by tank capacity and recovery rate. Instant gas systems are sized by L/min.

Assuming External Gas Units Can Go Indoors

External gas units are outdoor/external only unless the specific product is designed and approved for internal or flued installation.

Comparing Supply-Only Price to Installed Cost

Supply-only product pricing is not the same as total replacement cost.

Forgetting Valves and Fittings

The hot water unit may not be the complete order.

LPG Hot Water Buyer Checklist

Before choosing an LPG hot water system, check:

Current hot water system brand and model
Current system type
LPG confirmed
Tank capacity if storage
Flow rate in L/min if instant gas
Whether the current system keeps up
Number of people in the home
Number of bathrooms
Shower habits
Bath use
Desired system type
LPG storage or LPG instant gas
Tank capacity if storage
Recovery rate if storage
Flow rate if instant gas
LPG bottle setup
Regulator suitability
Gas pipe sizing
Water pressure and flow
External location
Product dimensions
Connection positions
Controller compatibility where relevant
Delivery access
Required valves and fittings
Warranty information
Licensed trade requirements

Compare LPG Hot Water Systems Online

Hot Water Outlet makes it easier to compare LPG hot water systems by brand, system type, tank capacity, flow rate, dimensions, specifications and supply-only pricing.

Start with:

Then compare brands:

If LPG is no longer the best fit, compare:

FAQs About LPG Hot Water Systems

What is the best hot water system for a home with LPG?

For many LPG homes, the best options to compare are LPG instant gas and LPG gas storage hot water. Instant gas may suit homes wanting continuous flow, while gas storage may suit homes replacing a tank-style system.

Is LPG instant gas better than LPG gas storage?

LPG instant gas may suit homes wanting continuous flow hot water where LPG supply and water pressure are suitable. LPG gas storage may suit homes replacing an existing tank-style system. Neither is automatically better.

What size LPG instant gas hot water system do I need?

Instant gas systems are sized by flow rate in L/min. Smaller homes may suit lower-flow models, while larger families or two-bathroom homes may need higher-flow systems, subject to LPG supply and water pressure.

What size LPG gas storage system do I need?

The right gas storage size depends on the number of people in the home, number of bathrooms, shower habits, bath use, tank capacity and recovery rate.

Can I use a natural gas hot water system on LPG?

No. Natural gas and LPG are not interchangeable unless the exact product is designed and approved for conversion or that gas type. Always order the correct model.

Is LPG hot water better than electric?

The better choice depends on the property. LPG may suit homes already set up for bottled gas. Electric storage or heat pump hot water may suit homes wanting to move away from LPG or where electrical options are more practical.

Can I replace LPG hot water with a heat pump?

Yes, if the property has suitable outdoor space, airflow, condensate drainage and electrical requirements. A licensed electrician and plumber should confirm suitability before installation.

Are Rinnai and Bosch good for LPG hot water?

Rinnai and Bosch are commonly compared for LPG instant hot water. The right choice depends on flow rate, LPG supply, water pressure, product dimensions and location.

Do LPG hot water systems need valves and fittings?

Some LPG hot water replacements require valves, fittings, controllers or accessories depending on system type and connection layout. Browse valves, pipework and fittings and confirm compatibility before ordering.

Can I install an LPG hot water system myself?

No. LPG hot water systems involve plumbing, gas fitting and sometimes electrical work that should be completed by appropriately licensed tradespeople. Hot Water Outlet sells supply-only hot water systems and accessories online, and may help organise quotes from reputable installers where appropriate.

Find the Best LPG Hot Water System

The best hot water system for an LPG home depends on household demand, system type, gas bottle setup, regulator suitability, water pressure, tank capacity, flow rate, location and budget. LPG instant gas may suit homes wanting continuous flow hot water. LPG gas storage may suit homes replacing a tank-style system. Electric or heat pump options may suit homes moving away from bottled gas.

Browse gas hot water systems and instant gas hot water systems online with Hot Water Outlet to compare LPG hot water options by brand, size and specification.

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