• Rheem 28Ltr Ultra Internal Natural Gas 60 Degrees Continuous Flow Hot Water 864B28NF

    $3,564

    Rheem 28Ltr Ultra Internal Natural Gas 60 Degrees Continuous Flow Hot Water 864B28NF

    $3,564
    Add to Wishlist
    4 payments of $891 with
    Up to 6 months interest free with Zip Money
    • Overview
    • Specifications & manuals
    • Legendary service
    • Delivery, services & returns
    • Questions & answers

    Overview

    The Rheem Ultra 28L Internal Gas Continuous Flow Water Heater (Model 864B28) is a powerful and efficient solution for households with substantial hot water needs. Engineered for high-demand applications, it delivers an impressive 28 litres of hot water per minute, ensuring ample supply for large families or busy homes with multiple hot water outlets in use simultaneously. Designed with Rheem’s advanced technology, this model achieves a 6-star energy rating, which means it delivers on-demand heating while significantly reducing energy consumption, perfect for environmentally conscious users seeking efficient performance without compromising on capacity.

    Rheem’s smart electronic control system keeps water flow and burner operation precisely balanced, maintaining steady temperatures even with fluctuating water demand. The unit’s pre-set 50°C option removes the need for a separate tempering valve, streamlining installation and enhancing safety. Equipped with a frost protection system, this heater is safeguarded against damage in freezing conditions, making it suitable for colder climates as well. An integrated digital display provides real-time monitoring of water temperature and diagnostic data for easy servicing, while the Rheem Q Factor™ ensures water temperature consistency, even when multiple fixtures are demanding hot water simultaneously.

    Additional safety and efficiency features include the Flamesafe® overheat protection, which automatically shuts down the system if it reaches unsafe temperatures, and a low minimum flow rate of just 1.5 L/min, making it compatible with flow-regulated taps. Designed for internal installation and available with a natural gas configuration, this Rheem model combines reliable performance, cutting-edge technology, and the capacity to handle the highest household demands with ease.
    Continuous Hot Water

    The Rheem Ultra 28L Gas Continuous Flow Water Heater guarantees an endless supply of hot water, perfect for high-demand households. Its advanced design ensures you’ll never run out, delivering continuous, efficient, and reliable hot water on demand.

    Flame Safe

    The Rheem 28L Continuous Flow Hot Water System features Flamesafe overheat protection, automatically shutting down the unit to prevent overheating. This advanced safety feature ensures reliable, worry-free hot water performance while maintaining exceptional energy efficiency and durability.

    Rheem Q Factor

    Equipped with Rheem Q Factor™, this 28L Internal Continuous Flow Hot Water System ensures rapid, consistent hot water delivery every time, eliminating the temperature fluctuations common in other systems and providing a reliably comfortable experience for every use.

    Made In Japan

    Crafted in Japan, the Rheem 28L Internal Continuous Flow Hot Water System delivers exceptional quality and performance. Designed for larger households, it provides reliable, energy-efficient hot water on demand, compact and space-saving design.

    Specifications & manuals

    key Specifications
    Brand
    Rheem
    Model Number
    864B28NF
    Height (mm)
    559 mm
    Width (mm)
    343 mm
    Depth (mm)
    260 mm
    Weight (kg)
    27 kg
    Finish Colour
    Silver
    Finish Colour Description
    Silver Grey Finish
    Fuel Type
    Natural Gas
    Notes
    An internal unit requires optional extra ducting to exhaust externally, which your plumber can supply.
    warranty
    Manufacturer Warranty
    3 Years
    Warranty Note
    15-Year Parts Warranty only on the Heat Exchanger.
    Use
    Not intended or designed for commercial use.
    additional Dimensions
    Package Dimensions (H x W x D)
    861 x 355 x 408
    Package Weight (kg)
    28
    energy Efficiency
    Energy Star Rating
    6
    other Features
    Hot Water Selection
    Continuous Flow
    Flow Per Minute
    28 L
    Temperature Range - Maximum
    60 °C
    Hot Water Type
    Continuous
    Features

    Installation Type: Internal Gas  Continuous Flow Hot Water System requires optional extra ducting to exhaust externally supplied by your plumber, Natural Gas is Only available for internal Units.

    Suitable Home: Suits Homes with 2.5 to 3 Bathrooms.

    Rheem Q Factor:   ensures rapid hot water every time, with none of the fluctuations that occur with some continuous flow units.

    Flamesafe Overheat Protection:  shuts down the water heater before overheating can occur.

    Hot Water Temperature: Pre-Set to 60 Degrees. Hot water over 50 degrees Fahrenheit going to any bathroom area must have a temperature-limiting valve installed, provided by your plumber at an extra fee.

    Water Flow: Minimum Operating flow of 1.5Ltrs per minute.

    Fault Display: Digital display for easy fault diagnosis.

    Smart Electronic Control: Rheem Gas Continuous Flow is fully electronically controlled for efficient and reliable hot water.

    Connections: 20mm (3/4") Gas and Water connections and a 10amp Powerpoint.

    6-Star Rating: Rheem Gas Continuous Flow’s 6-Star Energy Rating means efficient, on-demand hot water, while keeping your hot water energy consumption down.

    electrical Connection
    Type of connection
    10A plug & lead
    country of Origin
    Origin
    Japan

    Legendary service

    The Appliances Online Net Promoter Score (NPS) is based on feedback from 89,897 people, collected between August 2024 to August 2025. Learn more about the Net Promoter Score (NPS).
    Bravo Appliances Online BRAVO!!!
    Paul , Lane Cove
    The Appliances Online team were great and we know where we'll be buying
    Errol and Sue,
    Nothing was too much trouble
    Appliances Online customer, Australia

    Delivery, services & returns

    Appliances Online is all about legendary service. We offer free next business day delivery, free connection, free removal and free recycling, and we even offer Saturday delivery and, in some locations, a Premium Delivery option that allows you to choose your own 2-hour delivery window.

    Questions & answers

    No-one has asked a question about this product yet. Want to be the first?
    I agree to the terms & conditions
    We're here to help 24/7 - for an immediate answer to your question, chat with one of our Live Chat agents below or call us on 1300 000 500 .

  • It's sometimes necessary to upgrade your heating or cooling system quickly. Maybe you're looking for a more energy-efficient model, replacing a worn-out unit or addressing changing household needs - whatever the reason, finding the right product can feel daunting. However, at Appliances Online, our goal is to make your shopping experience hassle-free. Featuring over 8,000 unique products from top global brands, we make shopping from home or your phone easy. You don't need to go through endless sites comparing features and specs - we've done the work for you. We're dedicated to giving you a seamless experience so you can focus on what's important for you. As Australia's largest online retailer of appliances and home essentials, our goal is to make your purchasing decision effortless by providing a streamlined service. We appreciate how valuable both your time and money are, so we include so much more with every purchase. So, no matter if you're searching for Rheem 28Ltr Ultra Internal Natural Gas 60 Degrees Continuous Flow Hot Water 864B28NF or looking for something completely different, we've got exactly what you need and more. Shopping for the home products you need has never been easier, thanks to Appliances Online.

    Finding the right heating and air cooling products can be challenging, especially when you're balancing both budget and needs. Because these products are so essential to your comfort, we provide services to make the shopping process easier. Thanks to our Price Match Guarantee*, you're assured a great deal every time you shop with us. If you see a lower price for the same item at an Approved Retailer, give us a heads-up, and our friendly customer service team will confirm the price match. Shopping with us is made easy and convenient; whether you're considering options like Omega Altise Unflued Natural Gas Convector Heater WHITE OAGCH25NGW or Rheem 191050G4 Rheemglas 50L 1.8KW Electric Hot Water System, we have an extensive selection to suit every preference. No matter if you're looking for something high-tech or simple, you can count on us to guide you through the choices. Thanks to Appliances Online, you don't have to worry about the shopping experience, even if you're searching for items like Mitsubishi Electric 450L Bottom Mount Frost Free Fridge MR-CX450ER-ST-A or Westinghouse White Elevated Electric Oven WDE132WC-R. We strive to make your shopping experience as easy and satisfying as possible, supported by our legendary service, so you can focus on enjoying your home life. Browse our range today and discover just how easy it can be to find the right heating or air conditioners for your home.

    Are you ready to order heating or cooling products from our Heating & Cooling range, or maybe some other home essentials? To see if we deliver to your area, simply type your postcode or suburb into the 'delivery location' bar on our site. With 95% of Australia's population covered, Appliances Online usually offers Free, Next Day Delivery*; your order can often arrive by the next day (Monday to Friday), provided it's in stock. If you need support with your order or our services, our Sydney customer service team is available 24/7; just call 1300 000 500, and you'll connect with a real human team member eager to help. For areas where we use our own trucks for delivery, we provide Free Connection for select models of fridges, washing machines, dryers and microwaves. On top of that, we can even remove your old appliance for recycling; simply select this option at checkout, and we'll take care of the rest. Whether you're browsing items from our Fridges and Freezers page or Andoo collection, you can count on us for reliable and convenient service, so shop at Appliances Online today!