Compare Hot Water Systems

Families of 3–5 who never want to run out of hot water

Australia's most popular continuous flow unit. Compact wall-mounted gas system that heats water on demand — you only pay to heat what you use, and it never runs out. A dependable workhorse we install week in, week out.

• Endless hot water on demand
• Compact wall-mounted — frees up yard/garage space
• Preset 50°C delivery, no tempering valve required in most installs
• Natural gas or LPG

Needs a gas connection and adequate gas supply. Slightly higher upfront cost than a basic electric storage swap.

Larger households wanting the most efficient gas unit

Thermann's flagship condensing continuous flow. Secondary heat exchanger recycles exhaust heat, making it one of the most gas-efficient units on the market — lower running costs over the life of the system.

• Condensing technology — up to 7-star equivalent efficiency
• Endless hot water, 26L/min
• Optional controllers for precise bathroom temperature
• Natural gas or LPG

Condensate drain required, so installation is slightly more involved than a standard continuous flow.

Budget-conscious swaps from an existing instantaneous unit

Rheem's proven continuous flow range. A straightforward, well-priced unit backed by Rheem's Australian service network — a great value like-for-like replacement.

• Endless hot water on demand
• 50°C and 60°C preset models available
• Wide availability — fast same-day replacement
• Natural gas or LPG

Non-condensing, so running costs are a touch higher than the Thermann C7.

Families of 3–4 wanting a long-life electric tank

Stainless steel cylinder means no sacrificial anode to service and a 10-year cylinder warranty. A set-and-forget electric storage tank for households that want maximum life with minimum maintenance.

• Stainless steel tank — no anode servicing
• 10-year cylinder warranty
• Suits off-peak tariffs to cut running costs
• Indoor or outdoor installation

Higher upfront price than a vitreous enamel tank. Heaviest running costs of any system type unless paired with solar PV or off-peak power.

Fast, affordable like-for-like tank replacement

The value workhorse of electric storage. When your old tank lets go and you need hot water back today, a Vulcan swap is usually the fastest, most affordable fix — installed same-day in most cases.

• Most affordable full-size replacement
• Same-day changeover on most standard swaps
• Hardened vitreous enamel cylinder
• Suits off-peak tariffs

Shorter warranty and anode should be checked every 5 years to maximise tank life.

Units, granny flats and single-tap applications

Compact under-bench or cupboard-mounted storage for small spaces — ideal for granny flats, offices and kitchenettes where a full-size tank won't fit.

• Compact — fits in cupboards and under benches
• Plugs into standard power on some models
• Quality Australian-made cylinder

Small capacity — not suitable as a whole-house system for families.

Big families with high morning demand

Rheem's premium 5-star gas storage. Fast recovery means it delivers 330L in the first hour from a 160L tank — brilliant for households where everyone showers at once.

• 5-star gas efficiency
• Fast recovery — 330L first-hour delivery
• 10-year cylinder warranty
• Works during power outages

Needs gas and a suitable outdoor position. Continuous flow is more efficient if you're replacing the whole setup anyway.

Like-for-like gas tank swaps for 2–4 person homes

A dependable, well-priced gas storage tank. If you've already got a gas storage unit and want the simplest same-day replacement, this is the straightforward choice.

• 4-star gas efficiency
• Same-day changeover on most standard swaps
• Works during power outages

Standing pilot light uses some gas around the clock — continuous flow is cheaper to run long-term.

Slashing hot water running costs, especially with solar PV

A split-system heat pump that works like an air conditioner in reverse — pulling heat from the air to heat water using around a quarter of the electricity of a standard tank. Quiet, efficient, and eligible for government rebates (STCs).

• Cuts hot water power use by up to 70%
• Very quiet split-system design
• Pairs perfectly with rooftop solar PV
• Government rebates (STCs) reduce the installed cost

Higher upfront cost — the rebates and running-cost savings do the heavy lifting over 3–5 years.

Best-value entry into heat pump savings

A popular all-in-one heat pump at a sharp price point after rebates. Smart controls let you time heating to your solar PV generation for close-to-free hot water.

• All-in-one integrated design
• Wi-Fi timer — heat when your solar is producing
• Strong value after government rebates

Integrated units are slightly more audible than split systems — placement matters, we'll advise on site.

Heat pump savings with Rheem's service network behind it

Rheem's Australian-designed heat pump with quiet operation and a strong local support network. A safe, proven choice if brand support is your priority.

• Quiet 64dB operation
• Australian-designed with national service support
• Eligible for government rebates (STCs)

Slightly lower efficiency than the Thermann X split, but simpler all-in-one installation.

Maximum long-term savings on sunny SEQ rooftops

Roof-mounted collectors with a ground-level tank and electric boost for cloudy stretches. In South East Queensland's climate, solar thermal can supply the large majority of your hot water for free.

• Up to 90% of hot water heated free by the sun
• Electric boost covers cloudy weather automatically
• Big rebate eligibility (STCs)
• 10-year warranty on tank and collectors

Highest upfront cost and needs suitable north-facing roof space — a heat pump often achieves similar savings for less if roof space is tight.