Rheem vs Solahart vs Dux vs Rinnai: Hot Water Brands in WA
When your hot water system dies, you're suddenly choosing between brands you may know little about, often under pressure with cold showers on the line. The honest answer is that Rheem, Solahart, Dux, Rinnai, Bosch and Vulcan all make reliable systems, so the better question is which type and brand suit your home, your energy setup and your budget.
Here's a practical comparison of the major hot water brands available in WA, and how to think about the choice.
First, choose the type, then the brand
Before comparing brands, it helps to know which fuel and system type fits your home, because most brands specialise in particular categories. The main options are gas (storage or continuous flow), electric storage, solar, and heat pump. Our detailed guide on electric vs gas vs solar hot water walks through the trade-offs, but here's the short version:
- Continuous-flow gas heats water on demand with no tank, great for endless hot water if you're on natural gas via ATCO
- Gas storage keeps a tank hot and ready, a solid all-rounder
- Electric storage is cheap to buy and simple, but running cost depends on your tariff
- Solar uses roof collectors and can dramatically cut running costs in sunny Perth
- Heat pump runs on electricity but very efficiently, and like solar can attract federal STC support
The major brands compared
| Brand | Known for | Strong in |
|---|---|---|
| Rheem | One of Australia's best-known names, wide range across every type | Gas, electric, solar and heat pump, with broad parts and service availability |
| Solahart | A pioneer of solar hot water in Australia | Solar and heat pump systems, a natural fit for sunny WA |
| Dux | Reliable, well-priced systems across the board | Electric and gas storage, plus solar and heat pump options |
| Rinnai | Leaders in continuous-flow (instantaneous) gas | Continuous-flow gas units for endless on-demand hot water |
| Bosch | German engineering, strong in continuous flow | Continuous-flow gas and electric options |
| Vulcan | No-frills, dependable storage systems | Budget-friendly electric and gas storage |
All of these are widely available and serviceable in WA, which matters. A brand with good local parts and service support means faster repairs when something does go wrong.
Which brand suits which home?
You're on natural gas and want endless hot water
A continuous-flow gas unit is hard to beat, and Rinnai and Bosch are the standout names here, with Rheem also strong. These heat water only as you use it, so a large family never runs out. Our gas hot water service covers supply and installation.
You want the lowest running costs and have roof space
Solar is the classic choice for sunny Perth, and Solahart and Rheem are the go-to solar brands. Once installed, sunshine does most of the heating. A heat pump is the other low-running-cost option and doesn't need roof collectors, drawing heat from the air instead. Both solar and heat pump systems can attract federal STC support, which we cover under solar and heat pump hot water.
You want a simple, low-cost replacement
Electric storage from Dux, Rheem or Vulcan is inexpensive to buy and dead simple. The trade-off is running cost, which depends heavily on your electricity tariff. It's a common choice for smaller households and rentals where the low upfront price matters most.
You want a reliable middle-ground all-rounder
Gas storage from Rheem or Dux gives you a hot tank ready to go with lower running costs than electric in most cases, a sensible default for many homes on natural gas.
What actually matters more than the badge
Brand loyalty is fine, but these factors make a bigger difference to your experience:
- Correct sizing: a unit too small leaves you short on hot water; too big wastes money. Size to your household, not just the cheapest unit on the shelf.
- Right type for your energy setup: the best gas unit is no help if you're not connected to gas.
- Warranty and local support: check the tank and parts warranty, and that the brand is serviced locally.
- Quality installation: even the best unit fails early if it's installed poorly. In WA, hot water and gas work must be done by a licensed plumber (and gas fitter for gas units).
- Water quality: Perth's moderately hard water can scale up any brand of storage tank over time, so regular servicing matters regardless of badge.
What about running costs?
Purchase price is only half the picture. What the system costs you to run over its life often matters more, and it varies a lot by type rather than by brand:
| System type | Upfront cost | Running cost |
|---|---|---|
| Electric storage | Lowest | Highest, unless on a controlled-load tariff |
| Gas storage / continuous flow | Moderate | Lower than standard electric for most homes on gas |
| Solar | Higher | Very low, sunshine does the heating |
| Heat pump | Higher | Very low, runs efficiently on electricity |
A cheap electric unit can end up the most expensive option once years of power bills are counted, which is why solar and heat pump systems, despite a higher sticker price, appeal to households staying put long term. The federal STC support on eligible solar and heat pump systems narrows that upfront gap too.
A quick word on warranties and servicing
Most quality brands offer solid warranties on the cylinder, with shorter terms on parts and labour. Whatever you choose, keep up with servicing. Flushing sediment, checking the anode, and testing the relief valve all extend the life of the unit, and neglecting them is a common reason systems fail years early. Ask your plumber what servicing your chosen system needs and how often, so you get the full life out of it.
The bottom line
There's no single "best" hot water brand for WA. Rinnai and Bosch lead on continuous-flow gas, Solahart and Rheem lead on solar, and Dux, Rheem and Vulcan cover reliable, affordable storage. The right choice is the one that matches your energy connection, household size and budget, installed correctly by a licensed plumber. If you're unsure, a quick chat about your home is worth more than any brochure. See our full hot water systems service for supply, install and repairs.
Not sure which system suits your home? Call our licensed Canning Vale plumbers for straight advice on the right brand and type for your household.
Frequently asked questions
Which hot water brand is best in WA?
There's no single best brand. Rinnai and Bosch lead on continuous-flow gas, Solahart and Rheem lead on solar, and Dux, Rheem and Vulcan offer reliable storage units. The best choice depends on your energy connection, household size and budget.
Is Rheem or Rinnai better?
They shine in different areas. Rinnai is a leader in continuous-flow gas hot water for endless on-demand hot water, while Rheem offers a very broad range across gas, electric, solar and heat pump. Your fuel type and needs decide the winner.
Do solar and heat pump hot water systems get a rebate in WA?
Eligible solar and heat pump systems can attract support through the federal Small-scale Technology Certificate (STC) scheme, usually applied as an upfront discount by an accredited installer. The value varies, so confirm the current amount with your installer.
Does Perth's hard water affect my hot water system?
Yes. Perth's moderately hard water can build up scale in storage tanks and on heating elements over time, reducing efficiency, regardless of brand. Regular servicing to flush sediment helps any system last longer.