Rinnai B20 Instant Gas Hot Water System

Rinnai B20 Instant Gas Hot Water System

The Rinnai B20 Instant Gas Hot Water System delivers a reliable 20 litres per minute of continuous flow hot water with a 6.0 Star energy rating, making it a popular choice for modern households and apartments. Part of Rinnai’s Builders Series, this compact unit is manufactured with high-quality Japanese components and engineered to perform efficiently, reducing operating costs and environmental impact. It is suited for external installation and features direct electronic ignition with Puretemp™ temperature stability technology.

FEATURES:

Heating Method:
Gas – direct electronic ignition with automatic flame sensing

Hot Water Supply:
Instantaneous continuous flow, heats water on demand

Recovery Time:
Instantaneous – continuously heats as needed

Installation Location:
External installation only

Water Pressure:

  • Minimum: 160 kPa
  • Maximum: 1000 kPa

Energy Efficiency:
6.0 Star energy rating

Operating Costs:
Economical operation due to high efficiency and reduced standby loss; lower greenhouse gas emissions

Best for:

  • 1 to 2 bathroom homes
  • Households prioritising efficiency and reliability in a compact design

Number of Bathrooms and People (Capacity):

  • Suitable for 1–2 bathrooms depending on climate
  • Ideal for 2–4 people
 

Additional features:

  • Puretemp™ temperature stability control ensures consistent outlet temperature
  • Optional Smartstart® preheat system for water conservation
  • Compatible with low-flow WELS showerheads
  • Compact, sleek Japanese design for flexible placement
  • Built-in frost protection (where required)
  • Compatible accessories: pipe covers, recess boxes, flue diverters, and security brackets
  • Compatible with temperature limiting devices (TLDs)

Specifications

Hot Water Delivery: 20 litres per minute at 25°C rise
Gas Consumption: 156 MJ/h (Natural Gas or LPG)
Weight (Empty) 14 kg
Height 531 mm
Width 351 mm
Depth 195 mm

Warranties

Manufacturers Tank Warranty (Domestic) Heat exchanger - 10 years standard (15 years with extended warranty option)
Manufacturers Parts & Labour Warranty (Domestic) 3 years standard (5 years if two or more water controllers are installed in domestic settings)

Technical Specifications

Powerpoint Required: Yes – 240V AC, 50 Hz (10 amp weatherproof power point)
Gas Connection: 20 mm (3/4")
Hot Water Connection: 20 mm (3/4")
Minimum Operating Flow Rate: 1.5 L/min
Factory Pre-set Temperature: 50°C or 60°C (models vary)
Water controllers: Supports up to four controllers