Rinnai B20
Rinnai B20
Never run out of hot water
Unparalleled in performance, the Rinnai B20 Gas Continuous Flow Hot Water System lets you enjoy the luxury of hot water that never runs out.
Ideal for one bathroom homes (up to two in warmer climates), the unit only heats water as needed, meaning you get a continuous supply of hot water without bill shock. With an impressive 6 star energy rating, the Rinnai B20 is the most energy efficient 20L continuous flow gas hot water system on the market.
Engineered to withstand tough Australian conditions, the slimline unit not only saves on space.
Customise and complete your B20 hot water system with our comprehensive range of hot water controllers to enhance your experience.
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6.0 Star equivalent energy rating*
Never runs out of hot water
Precise temperature control for safety and convenience
Status operation monitor
Puretemp™ temperature stability technology
LPG or natural gas models available
6.0 Star equivalent energy rating*
- Low running costs
- Highly efficient
- Low greenhouse gas emissions
Superior technology
- Quality Japanese design and manufacturing
- Precise temperature control for safety and convenience
- Compact design allows installation flexibility
- Suitable for higher ambient water temperatures
- Compatible with low flow rated shower fixtures (3 Star - 7.0 to 9.0 l/min)
Rinnai quality
- After sales support
The product information on this website (comprising product brochures, warranty information, installation manuals, diagrams, specifications and representations) relates to current products. This information may be different for superseded products. For superseded products please contact Rinnai to confirm product information.
* Independently calculated using Australian Standard AS5263.1.2. | S5263.1.2 limits the rating shown on the energy label to 6.0 Stars. | Where the calculated rating of Rinnai appliances exceeds 6.0 Stars it is designated as an “equivalent” rating.
Rinnai – B20 Continuous Flow Hot Water System | Unit | |
Bathrooms* | Cool Climate | 1 |
Warm Climate | 1 – 2 | |
Dimensions (mm): H x W x D | 531 x 351 x 195 | |
Colour | Dune | |
Installation | External | |
Gas Energy Rating | 6.0 | |
Heating Capacity L/Min (raised at 25ºC) | 20 | |
Weight (kg) | 14 | |
Gas Input (High) | 156MJ/h | |
Connection (mm) | Cold Water | 20 (3/4″) |
Hot Water | 20 (3/4″) | |
Gas | 20 (3/4″) | |
Minimum Operating Flow (L/Min) | 1.5 | |
Factory Pre-set Temperature (°C)** | 50 / 60 | |
Ignition | Direct electronic ignition with automatic flame sensing | |
Gas Type | NG and LPG | |
Electrical Supply | AC 240V 50 Hz (10 amp weatherproof power point) |
|
Water Controllers | Up to 4 Water Controllers can be installed | |
Heat Exchanger Warranty | 15 Years# | |
Parts and Labour Warranty | 3 Years (5 Years if two or more Water Controllers are installed in domestic applications) |
* Sizing assumes AAA or 3 star outlets. Half a bathroom refers to a guest shower or powder room that is not used all of the time. For more sizing information, consult with your hot water specialist.
** 50°C appliances can be adjusted up to 53°C. For 60°C plus installations a tempering valve in accordance with AS3500.4 is required.
# Made from premium materials and built to last, Rinnai provides a standard 3 year (15 Year Heat Exchanger) parts and labour warranty on all Builders Series Continuous Flow hot water systems, plus an optional 5 years extended Heat Exchanger warranty.

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