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Rheem 20 Natural Gas Hot Water System

The Rheem 20L hot water system is ideal for homes with up to 1-7 people. Built tough with a NA tank and backed by a 10-year warranty, it's a reliable, efficient choice for everyday hot water.

🔥 Quick Specs & Benefits

  • 👥 Recommended Household Size: 1-7 people
  • 📏 Height: 580 mm
  • 📐 Width: 355 mm
  • 🔇 Noise Level: NA dB
  • 🌍 Made In: Japan
  • 🛡️ Main Cylinder Material: NA
Was $1,149.00, Now $929.00
🔥 Limited Stock: Only 5 left — order soon!
🚛 Free shipping with code "InstalledToday" at checkout.
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  • Verified Reviews: Rated 5 stars by real Australian customers
  • 🛡️ Genuine Warranties: We only sell brand-new, manufacturer-backed products

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Installed Today
Not sure if you need installation or a valve kit?

Answer a few quick questions and we will point you to the best order option before checkout.

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What do you need?
Choose whether you want supply only, supply + installation, or want help deciding.
Are you replacing an existing hot water system?
This helps us work out whether your order is likely a straightforward replacement or may need extra parts.
Are you replacing an identical system in the same location?
Same system type, similar size, and no relocation. If not, we will recommend a valve kit as the safer starting point.
Does your current installation meet current compliance requirements?
If no or unsure, we will recommend a valve kit or additional works as the safer starting point.
See what a compliant installation usually needs

Compliance items will change depending on the product type you are viewing.

    When would you like installation?
    Choose your preferred installation speed. We will try to preselect the closest matching install option below. If you want a specific business day, select that option and we will map it to the Same-Day / priority install option where available.
    Are you in Greater Brisbane / Gold Coast?
    Professional installation is only available in our current service area. Outside this area, we can still supply the product and valve kit if needed.
    Installed Today
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      Tax included. Shipping calculated at checkout.

      * Requested element size may come delivered separately to system for electric systems - All units supplied with factory with 3.6kW


      **Where a unit supplied is capable of supplying more than 50°C, a tempering valve must be installed on the property or purchased with the order.

      Reliable, Instant, Rapid Hot Water – Anytime, Every Time

      The Rheem 20L Continuous Flow Gas Hot Water System is designed for on-demand, efficient hot water delivery, ensuring you never run out of hot water. With a compact design and advanced Flamesafe® overheat protection, this system provides consistent temperature control for ultimate safety and comfort. Whether you’re running multiple taps or just want a steady, reliable hot water supply, the Rheem 20L is built to perform and is suitable for small to medium households.

      Why Choose the Rheem 20L Continuous Flow Units?

      20L per minute hot water flow rate – Delivers endless hot water for small to medium households
      Continuous Flow TechnologyOnly heats water when needed, reducing energy consumption
      Flamesafe® Overheat Protection – Automatically shuts down before overheating can occur
      Rheem Q Factor – Ensures rapid response heating with no temperature fluctuations
      Remote Temperature Controller Options – Set different temperatures for different areas of your home
      50°C Temperature Limited Models Available – Extra safety for families and compliance with regulations
      10-Year Heat Exchanger Warranty – Built for long-term reliability


      Key Features & Benefits

      🔥 Instant Hot Water, On Demand

      • 20L per minute flow rate ensures continuous, powerful hot water for showers, sinks, and appliances

      • No storage tank needed – never run out of hot water

      • Perfect for small to medium households

      • The Rheem 20L is particularly suitable for bathrooms for two people, ensuring a steady supply of hot water for showers and sinks.

      🔥 Advanced Safety Features

      • Flamesafe® overheat protection prevents the unit from exceeding safe temperatures

      • Optional remote temperature controllers allow you to set safe temperature limits for different taps

      • 50°C pre-set models available for extra safety, ideal for families with children

      🔥 Energy Efficiency & Cost Savings

      • Continuous flow technology means you only heat water when you need it, reducing gas bills

      • High-efficiency heat exchanger for fast and effective heating

      • Compact design saves space and integrates seamlessly into any home setup

      🔥 Durable & Reliable Performance

      • Rheem Q Factor Technology ensures rapid heat-up with no temperature fluctuations

      • Australian-built quality designed to withstand harsh weather conditions

      • 10-year heat exchanger warranty for long-term peace of mind

      Rapid Hot Water Delivery

      The Rheem 20L Gas Continuous Flow Water Heater is engineered for rapid hot water delivery, making it an ideal choice for homes with limited space. This continuous flow unit ensures that you have a constant supply of hot water whenever you need it, without the need for a bulky storage tank. With its medium capacity model, the Rheem 20L is perfectly suited for small to medium-sized apartments and townhouses. Its compact design allows it to fit seamlessly into tight spaces, providing an efficient and reliable hot water solution for households with limited space.

      Heat Exchanger Technology

      The Rheem 20L Gas Continuous Flow Water Heater boasts advanced heat exchanger technology, which is key to its efficient and reliable performance. The heat exchanger is meticulously designed to maximize heat transfer, ensuring that water is heated quickly and efficiently. This not only provides rapid hot water but also helps to reduce energy consumption, making it a cost-effective choice for any household. Additionally, the heat exchanger includes extra safety features such as overheating protection, ensuring safe and dependable operation at all times.

      Technical Specifications

      Flow Rate: 20L/min (at 25°C rise)
      Installation: Outdoor
      Energy Source: Gas (Natural Gas / LPG models available)
      Temperature Control: Optional remote controllers
      Safety Features: Flamesafe® overheat protection
      Warranty: 10 Years on Heat Exchanger, 3 Years on Parts & Labour


      Energy Efficiency and Cost Savings

      Designed with energy efficiency in mind, the Rheem 20L Gas Continuous Flow Water Heater offers significant cost savings. With a 6-star energy rating, it stands out as one of the most energy-efficient water heaters available. Utilizing natural gas as a fuel source, it further reduces energy consumption and operational costs. The inclusion of remote temperature controller options allows you to set the best and safest temperature for your household, optimizing energy use and enhancing safety. This energy-efficient design makes the Rheem 20L a smart choice for households looking to lower their energy bills without compromising on performance.

      Support and Maintenance

      At Installed Today, we prioritize providing exceptional support and maintenance for our customers. Our team of expertly-trained and qualified technicians is available 24/7 to address all your hot water needs, offering same-day service to ensure minimal disruption. We stand by the quality of our work with a comprehensive quality guarantee, ensuring you receive the best possible service. With a large inventory of parts, we can quickly diagnose and resolve any issues, ensuring a continuous supply of hot water. Our competitive pricing agreements with leading manufacturers allow us to offer our services at affordable rates, passing the savings on to you.

      Why Buy from Installed Today?

      Fast & Reliable Australia-Wide Shipping
      Expert Installation Services Available
      Competitive Pricing & Best Price Guarantee
      Secure Online Ordering & Checkout

      💡 Upgrade Your Home with the Rheem 20L Continuous Flow Hot Water System Today!
      🔥 Reliable, energy-efficient, and built for Australian households.
      🛒 Order now from Installed Today for seamless purchase & installation!

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        Hassle-Free Installation – Done Right by Trusted Experts!

        Need professional installation? We’ve got you covered! Our optional installation service connects you with our network of certified, trusted contractors, ensuring a smooth and stress-free setup.

        How It Works:

        🔹 Step 1: Select Installation Service
        Choose to include professional installation when purchasing your new system.

        🔹 Step 2: Pay for Installation Upfront
        Simply add the installation service prior to adding your product to cart —no hidden fees, no surprises.

        🔹 Step 3: We Assign a Certified Contractor
        We’ll match you with a licensed, experienced contractor from our network to handle the installation.

        🔹 Step 4: Schedule Your Installation
        The assigned contractor will contact you directly to arrange a convenient time for installation.

        🔹 Step 5: Direct Support When You Need It
        For any installation-related questions, your contractor is your first point of contact. If any issues arise, our team is here to help.

        🚨 Please Note: Installed Today supplies the product and connects you with a certified contractor for installation.

        We’re committed to delivering top-quality products and facilitating a seamless installation experience. Have product questions? Reach out to us anytime! 🔥

        Experience the "Installed Today" Difference with Our Verified Installers

        When you choose "Installed Today" for your installation needs, you're not just getting a product; you're gaining access to a network of rigorously verified installers dedicated to providing you with an exceptional service experience. Here's what you can expect when you opt for an installation by an "Installed Today" verified installer:

        Professional and Efficient Service

        • Prompt Communication: Our verified installers will contact you within 2 business hours of receiving your order details to confirm and begin scheduling your installation at the earliest convenience.
        • Expert Installation: All "Installed Today" installers are highly skilled and qualified, ensuring your product is installed according to the highest industry standards and specific regulations in your area.
        • Clear and Professional Communication: From the moment they receive your order until the completion of your installation, our installers maintain clear and professional communication, providing you with all necessary information regarding your installation.

        Peace of Mind

        • Insurance and Liability: Every "Installed Today" verified installer maintains comprehensive insurance coverage, giving you peace of mind knowing you're protected throughout the installation process.
        • Warranty and Quality Assurance: Enjoy a warranty on your installation, guaranteeing rectification work at no additional charge in the unlikely event of any deficiencies. Our installers strive to achieve a minimum 4.5-star average rating across major review platforms, reflecting our commitment to excellence and customer satisfaction.

        Customer-Centric Policies

        • Customer Dispute Resolution: In the rare event of a dispute, our installers are committed to acknowledging and initiating the resolution process within 1 business day, aiming for a swift and satisfactory resolution within 5 business days.
        • Rectification Work Timeframes: Should any rectification work be necessary, it will be acknowledged within 1 business day and completed within 2 business days, ensuring minimal inconvenience to you.

        Additional Services at Transparent Rates

        • Beyond Basic Installation: Our verified installers offer a range of additional services to complement your installation. All available services and their set rates are communicated upfront, ensuring no surprises.

        By choosing "Installed Today," you're not just installing a product; you're investing in a seamless, quality service that values your time and peace of mind. Trust in our verified installers to exceed your expectations with their professionalism, expertise, and commitment to excellence.

        This product description outlines the benefits and assurances provided by "Installed Today" verified installers, designed to inform and reassure customers about the high level of service they can expect.

        📦 Fast & Reliable Delivery – What to Expect

        🚛 Standard Delivery: 2-8 Business Days

        Express Delivery: 1-4 Business Days

        🔹 Super Fast Turnaround!90% of hot water orders in metro areas arrive within 1 business day! 🚀

        🔹 Weather Delays – Hot water systems can’t be shipped via courier in the rain, so delivery may be delayed during severe weather.

        🔹 Express Delivery Guarantee – If your express order takes longer than 1-4 business days, we’ll automatically adjust the timeframe to 2-8 days and refund your express shipping charge – no need to chase it up!

        🔹 Track Your Order – We’ll send you a delivery details as soon as your order is dispatched.

        Need help with your delivery? Get in touch – we’re happy to help! 😊

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