Rinnai vs Rheem vs Rheem Stellar: Which Electric Hot Water System Is Right for Your Home?
When your hot water system starts acting up or worse, stops working altogether choosing the right replacement is a big decision. With so many electric units on the market, homeowners often ask us, “Which brand is best: Rinnai, Rheem or Rheem Stellar?”
At Cooly Plumbing, we supply and install all three brands, and we’re here to break down the pros and cons of each to help you choose the best electric hot water system for your needs.
Rinnai Hot Water Systems: Smart & Energy-Efficient
Best for: Low-maintenance homes and simple replacements.
- Budget-friendly models available
- Known for reliability and energy efficiency
- Compatible with off-peak and smart energy settings
- Wide range of tank sizes (from 25L to 400L)
- Simple, efficient electric heating technology
Our verdict: Rinnai offers 10 year warranty and smart technology and efficient operation with a great balance of price and performance. A top pick for households that need a basic, effective hot water solution.
Rheem Hot Water Systems: Long-Standing Aussie Favourite
Best for: Households that value proven performance and longevity.
- One of Australia’s most established and trusted brands
- Wide availability of parts for servicing and repairs
- High recovery rates (faster reheat time)
- Strong warranties and support
- 12 year Warrenty
Our verdict: Rheem is built tough and built to last. If you want durability and hot water on demand, Rheem’s electric models are hard to beat.
Rheem Stellar Stainless Steel: Top-Performance & Durability
Best for: Premium homes, long-term energy savings, and coastal conditions.
- Superior corrosion resistance – ideal for coastal and high-humidity areas
High recovery rate for larger households
Energy-efficient design with stainless steel cylinder (no anode required)
Sleek, modern appearance with premium build quality
Backed by one of Australia’s most trusted hot water brands
Our verdict: The Rheem Stellar Stainless Steel range is a standout choice for homeowners who want maximum performance, durability, and long-term value. It’s built tough, runs efficiently, and is perfect for families who expect reliable hot water day in, day out.
How Much Does It Cost to Install a Hot Water System?
Installation costs can vary depending on:
- Size of the system (litre capacity)
- Electrical and plumbing setup at your property
- Whether it’s a straight swap or upgrade
At Cooly Plumbing, our electric hot water installations start with a $65 diagnostic assessment, which is waived if you proceed with the install. We provide upfront fixed pricing, so there are no surprises on the bill.
Still Not Sure Which Hot Water System Is Right for You?
Let us help. We’ll assess your home’s layout, household water usage, and power configuration to recommend the best electric hot water unit for your needs — and we can often supply and install the same day.
We install Rinnai, Rheem, Rheem Stellar and more across Gold Coast and Tweed Shire, including Coolangatta, Elanora, Kingscliff, Palm Beach and beyond.
Book Your Hot Water Quote Today
Call 1300 247 259 or email info@coolyplumbing.com.au to book a licensed plumber. Honest advice. No pushy sales. Fixed pricing. Expert installation.
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