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 for best performance.

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 — using less gas 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.

Straightforward swaps from an existing instantaneous unit

Rheem's proven continuous flow range. A straightforward, reliable unit backed by Rheem's Australian service network — a solid 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 slightly less gas-efficient 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 for efficient running
• Indoor or outdoor installation

Best run on an off-peak tariff for efficiency; a vitreous enamel tank is a simpler alternative.

Fast 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, simplest fix — installed same-day in most cases.

• Straightforward 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 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 more efficient long-term.