However, there probably is a standout “best” … for you. It depends on:

  • Your home
  • Your household size
  • Your lifestyle.

In our step-by-step guide, we’ll walk you through each major option, comparing features and showing you how to work out which one suits you best.

Step 1: Know the hot water system types

In Australia, households typically choose from four main hot water system types:

Storage Tanks (Gas or Electric): Heat and store water for later use.

Instantaneous Hot Water (Continuous Flow): Provides hot water on demand.

Heat Pumps: Use air-source technology to heat water efficiently.

Solar Hot Water: Uses panels to harness sunlight, often with a booster.

These are the core types of hot water systems in Australia – but within each, you’ll also find plenty of variations in capacity, brand, and efficiency.

Step 2: Compare the types of water heaters

Each category has its own strengths and drawbacks. Here’s a closer look at the types of water heaters you’ll be choosing between:

Electric Hot Water Storage: Simple, affordable to install … but higher ongoing running costs.

Gas Hot Water Storage: Reliable with faster heat recovery … but requires gas connection.

Instantaneous (Gas or Electric): Compact and efficient and never runs out of hot water … but flow may be limited if multiple taps are used.

Heat Pumps: Energy-efficient, works like an air conditioner in reverse … but can be noisier and less effective in very cold climates.

Solar: Big upfront cost, long-term savings, and the greenest option … but performance depends on sunlight and roof space.

Step 3: Understand the different types of hot water systems

Some families need large storage tanks for multiple showers, while others benefit from space-saving continuous flow. Here’s how the different types of hot water systems typically line up for everyday needs:

Families with high morning or evening demand: Gas or electric storage.

Small households or couples: Instantaneous continuous flow.

Eco-conscious homeowners: Solar or heat pump.

Properties without gas connection: Electric storage, solar with electric booster, or a heat pump.

These broad rules can help you narrow down the best hot water system solution for your home.

Step 4: Think about efficiency & running costs

One of the biggest differences between the types of hot water heating systems is how much they cost to run. Energy-efficient systems like heat pumps and solar can save thousands over their lifespan, while cheaper electric storage tanks can be costly long term.

Let’s have a go at comparing different hot water systems side by side:

Gas Storage: Lower running costs than electric … but depends on gas price fluctuations.

Instantaneous Gas: Highly efficient and space-saving … but needs a strong gas supply.

Solar: Long-term winner for savings … though initial investment is steep.

Heat Pump: Lower bills … but slightly higher maintenance and upfront cost.

Step 5: Consider instantaneous gas hot water systems VS storage

So many homeowners end up narrowing down their circumstances and choice to a head-to-head between these two. The choice of instantaneous gas hot water systems vs storage depends on your household habits:

  • If you want limitless hot water and have a reliable gas supply, instantaneous is hard to beat.
  • If you prefer guaranteed high-flow capacity and don’t mind a larger tank, storage systems can handle multiple bathrooms at once.

Step 6: Match hot water options to your household

Now that you’ve got the big picture, how do you make the final call? Think of these hot water options as a checklist:

Q: How many people live in your home?

  • Larger families often need bigger storage tanks.

Q: What’s your budget?

  • Upfront vs ongoing costs differ greatly across systems.

Q: Do you have gas, solar potential, or just electricity?

  • Infrastructure limits the hot water systems that Australian customers can choose.

Q: Do you want eco-friendly technology?

  • Heat pumps and solar are the most sustainable hot water system options.

By answering those questions honestly and step by step, you’ll land on the system for your situation that balances:

  • Practicality
  • Cost
  • And comfort.

Need expert advice or installation?

There are many different types of hot water systems in Queensland and Australia, and each has its place. The key takeaway is that there isn’t a single “number one” – but there is a number one for YOU.

Call Caboolture Plumbing and Hot Water today for fully customised guidance on the best hot water solution for your home.