• Bosch OptiFlow Professional Internal Natural Gas Hot Water System 7736502499

    Bosch LPG Continuous Flow Hot Water System 7701531975 hero image
    Bosch LPG Continuous Flow Hot Water System 7701531975
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    • Overview
    • Specifications & manuals
    • Legendary service
    • Delivery, services & returns
    • Questions & answers

    Overview

    Video Thumbnail
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    A hot water system is one of the most hardworking appliances in the home. That’s why you want an appliance you can rely on for your hot water supply. Bosch painstakingly engineer their hot water systems to improve performance and efficiency. This means you can wake up with an invigorating shower, or relax at night with a warm bath thanks to the Bosch OptiFlow Professional hot water system.

    This model is ideally suited for small households with two to four people - an excellent choice for small families or couples. You can set your desired preset temperature using the integrated controller and this model can be adjusted to higher temperatures for the laundry or kitchen. The LCD display shows the current setting, allowing you to monitor your system at a glance.

    This appliance is powered by natural gas and features Bosch’s combustion management technology, resulting in an ultra-efficient and dependable hot water system.

    Note: the hot water system in the video refers to the Optiflow Professional 12-litre natural gas model. This is the Optiflow Professional 20-litre natural gas model.
    Suitable for small households

    This hot water system has a hot water flow rate of 16 litres per minute, making it suitable for homes with one bathroom. If you have a small household consisting of one to three people, this should be well-suited for your household.

    High temperature system

    This hot water system can be adjusted to temperatures higher than 50°C, if your laundry or kitchen requires hotter temperatures. If you need a higher temperature, the installation of tempering valves for bathrooms is required to prevent accidental scalding.

    Efficient engineering with LPG gas

    This exceptionally efficient hot water system heats water with LPG gas, and is designed to ensure low running costs and low emissions of greenhouse gases. A design that is kinder to your budget and the planet.

    Compact design for benchtops

    This compact blast-chiller is ideal for small commercial kitchens or home use. This fits on benchtops so you can enjoy professional results with minimal footprint.

    Specifications & manuals

    key Specifications
    Brand
    Bosch
    Finish Colour
    White
    Height (mm)
    570 mm
    Width (mm)
    364 mm
    Depth (mm)
    175 mm
    Model Number
    7736502499
    Fuel Type
    Natural Gas
    Tank Capacity
    20 L
    Notes
    Waterproof powerpoint required
    warranty
    Manufacturer Warranty
    3 Years
    Warranty Note
    3 years for parts and labour - 12 years for the heat exchanger part only. Domestic use only
    Use
    Not intended or designed for commercial use.
    energy Efficiency
    Energy Star Rating
    6
    other Features
    Features
    ● Suitable for households with 1 or 2 bathrooms

    ● Temperature preset: 55°C

    ● Optional extra ducting required - please refer to your installer for correct ducting parts

    ● Compact and lightweight

    ● Solar compatible water heater

    ● Electronically controlled modulation

    ● Up to 4 optional controllers: 1 x main Controller & up to 3 extra bathroom controllers. Please view our Accessories

    ● If you require hotter than 50°C, an optional extra tempering valve is required for any water going to a bathroom or en suite

    This is an extra charge provided by your plumber
    electrical Connection
    Type of connection
    10A plug & lead
    country of Origin
    Origin
    China

    Recycling Partnership Program

    Bosch and Appliances Online – Proud Partners in Recycling!
    Bosch is a proud supporter of Appliances Online’s Packaging Recycling Program. Working together, we stop around 85% of packaging waste including cardboard, soft plastics and expanded polystyrene from polluting our environment or ending up in landfill. 

    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
    Cheaper than the chain stores
    Craig, Crows Nest, QLD
    Blown away by this service.
    James Waters , Braeside VIC

    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

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