Rinnai Hot Water Systems Supplied & Installed Across Perth
Rinnai is the name Perth households reach for when energy efficiency matters. Best known for its market-leading continuous flow gas systems, Rinnai has been keeping Australian homes in hot water for over 50 years, pairing Japanese engineering with units built to handle tough Australian conditions. Proud Plumbing & Gas supplies, installs, repairs and services the full Rinnai range across the Perth metro area - with fixed upfront pricing, a $0 call-out fee during business hours, and same-day Rinnai installation available for most jobs.
Our licensed plumbers and gas fitters (PL 9874 | GF 014602) install Rinnai's 6-star continuous flow systems and reliable electric storage units every week across Perth. Whether you're replacing a failed system today or upgrading to slash your gas bill, we'll match the right Rinnai model to your home and install it properly the first time.
Which Rinnai Hot Water System Is Right for Your Perth Home?
Rinnai B16 Continuous Flow - One-Bathroom Homes
The Rinnai B16 (from $1,380) is the most energy-efficient 16L continuous flow system on the Australian market, carrying a 6-star energy rating. It heats water only when you turn the tap on - no storage tank, no standing heat losses, no running out of hot water. Preset to a safe 50°C, it's the ideal instant gas hot water solution for one-bathroom homes, units and villas.
Rinnai Builders B20 Continuous Flow - The Versatile Middle Ground
The Rinnai B20 (from $1,450) delivers 20 litres per minute with an outstanding 6.1-star efficiency rating - the most efficient unit in its class. It suits one-bathroom homes with higher demand, and up to two bathrooms in Perth's warm climate. External installation, compact footprint, and a continuous supply that never runs cold.
Rinnai B26 Continuous Flow - Family Homes
For two-bathroom family homes, the Rinnai B26 (from $1,550) is our most popular continuous flow installation. With a 26L/minute flow rate and 6-star efficiency, it comfortably runs two showers at once. The slimline design saves outdoor wall space, and it's compatible with Rinnai's range of temperature controllers, letting you set precise shower temperatures from inside the home - a great safety feature for kids and elderly family members.
Rinnai Electric Storage (125L & 160L)
Not on gas? Rinnai's electric storage systems offer the same build quality in a tank format. The 125L (from $1,459) suits 3–4 person households, while the 160L (from $1,749) covers 4–5 people. Both feature enamel-lined tanks with enhanced sacrificial anode protection for a longer service life, thermostatic control with safety shut-off, and standard sizing that makes emergency changeovers fast and inexpensive - available in internal and external configurations.
Why Perth Households Choose Rinnai
- Lowest running costs in class - Rinnai's B-series continuous flow units carry 6 to 6.1-star energy ratings, the best on the Australian market. Because no energy is used until you open a tap, most households switching from electric storage see a significant drop in water heating costs.
- Endless hot water - continuous flow means the fourth shower of the morning is as hot as the first.
- Compact and quiet - slimline external units free up the space a bulky tank used to occupy.
- Proven in Australian conditions - engineered and tested for Australian water and weather.
- Strong manufacturer's warranty - backed nationally, with parts readily available in Perth.
Rinnai Running Costs: Continuous Flow vs Storage
For a typical Perth family on natural gas, a Rinnai continuous flow system is one of the cheapest ways to heat water. A storage tank pays to keep 125–160 litres hot around the clock - including while you're at work or on holiday. A Rinnai B-series unit eliminates those standing losses entirely. Combined with Perth's natural gas prices, most households switching from an electric storage tank to a Rinnai continuous flow system cut their water heating costs substantially, and never run out of hot water again.
Rinnai Installation, Replacement & Repairs in Perth
- Same-day Rinnai installation - we carry popular B-series models and standard fittings, so most replacements are completed the same day you call.
- Storage-to-continuous-flow conversions - we handle the gas line sizing, valves, electrical connection and compliance involved in switching from a tank to an instantaneous system.
- Like-for-like changeovers - old unit removed and disposed of, new Rinnai installed, tested and certified.
- Rinnai repairs and servicing - error codes, ignition faults, temperature issues and water leaks across the full Rinnai range, including older Infinity models.
- Temperature controller installation - add Rinnai controllers to kitchens and bathrooms for precise, safe water temperatures.
Every job starts with a fixed-price quote - the unit, installation, old system removal and all fittings included. The price we quote is the price you pay.
Rinnai Service Across the Entire Perth Metro
From Joondalup and Wanneroo in the north to Rockingham and Mandurah in the south - including Fremantle, Osborne Park, Midland, Canning Vale, Victoria Park and the Perth CBD - our team installs and repairs Rinnai systems right across Perth, with 24/7 availability for hot water emergencies.
Frequently Asked Questions
How much does a Rinnai hot water system cost in Perth?
Rinnai continuous flow units we stock range from $1,380 (B16) to $1,550 (B26), and electric storage units from $1,459 (125L) to $1,749 (160L), plus installation. We quote a fixed, all-inclusive price - unit, installation, removal and fittings - before any work starts, and there's no call-out fee during business hours.
What size Rinnai continuous flow do I need?
As a rule of thumb for Perth homes: the B16 suits one bathroom, the B20 suits one bathroom with high demand (or two in summer), and the B26 comfortably runs two bathrooms simultaneously. Household size, fixture count and winter inlet temperatures all matter - we'll size it properly when we quote.
Are Rinnai continuous flow systems cheaper to run than storage tanks?
Generally, yes. Rinnai's B-series carries 6 to 6.1-star energy ratings and consumes no gas until a tap is opened, eliminating the standing heat losses of a storage tank. Households switching from electric storage typically see the biggest savings.
Can you convert my storage hot water system to a Rinnai continuous flow?
Yes - this is one of our most common jobs. The conversion involves upgrading the gas supply line if needed, new valves, a power point for ignition, and removal of the old tank. We provide a fixed quote covering the entire changeover.
How long do Rinnai hot water systems last?
Rinnai continuous flow units commonly last 15–20 years with periodic servicing - significantly longer than storage tanks, which typically last 8–12 years. There's no tank to corrode, which is the usual failure point of storage systems.
Do you repair Rinnai error codes and ignition faults?
Yes. Our gas fitters diagnose and repair the full range of Rinnai faults - error codes, failed ignition, fluctuating temperatures and flow sensor issues - on both current B-series and older Rinnai Infinity models, across all Perth suburbs.
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