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Bosch Optiflow Professional 20L NG 50°C Compliant

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  • AU owned & operated for 50 years

Quick Overview

OptiFlow Professional is the standard for trade projects. Bluetooth is not available.

Features and Benefits

  • OptiFlow combustion management sytesm
  • 6 star efficiency
  • Compact, lightweight water heater
  • Solar compatible appliance
  • Electronically controlled modulation
  • Up to 4 optional controllers
  • 50°C compliant models available
  • 3 year parts and labour warranty
  • 12 year heat exchanger warranty
  • Main controller (Part no: 7736502925)
  • Bathroom Controller (Part no: 7736503406)

OptiFlow controllers are each supplied with a 20m cable. Any combination of bathroom and main controllers can be used, however at least one main controller must be used if a set temperature above 50°C is required.

Star Rating
OptiFlow combustion management system

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OptiFlow Professional   16L    20L    26L
Part number NG 7736503237  7736503245 7736503226
Part number LP 7736503238
7736503246  7736503227
Part number NG 50°C compliant 7736503235 7736503243(This one) 7736503224
Part number LP 50°C compliant 7736503236 7736503244 773650322
Technical Features      
Bluetooth Enabled Appliance No No No
Star Rating 6 Stars 6 Stars 6 Stars
Solar Compatible Yes Yes Yes
Temperature Controllers Up to 4 temperature controllers Up to 4 temperature controllers Up to 4 temperature controllers
Maximum Temperature Preset at 55°C. Adjustable to 60°C and 70°C Preset at 55°C. Adjustable to 60°C and 70°C Preset at 55°C. Adjustable to 60°C and 70°C
50°C Compliant Models Available Yes Yes Yes
Weight (unpacked) 15kg 15kg 18kg
Gas Supply Data      
Maximum Nominal Gas Consumption 122 Mj/h 149 Mj/h 199 Mj/h
Minimum Operating Gas Supply Pressure - NG 1.13 kPa 1.13 kPa 1.13 kPa
Minimum Operating Gas Supply Pressure - LPG 2.75 kPa 2.75 kPa 2.75 kPa
Water Supply Data      
Maximum Permissible Pressure (Static) 1000 kPa 1000 kPa 1000 kPa
Minimum Operating Pressure 100 kPa 100 kPa 100 kPa
Minimum Operating Pressure for Maximum Performance 300 kPa 300 kPa 300 kPa
Minimum Water Flow 2 L/min 2 L/min 2 L/min
L/ min at 25°C Temperature Rise 16 L/min 20 L/min 26 L/min
Maximum Inlet Temperature 80°C 80°C 80°C
Electrical Circuit      
Power Supply Voltage 230 / 230 Vac 230 / 230 Vac 230 / 230 Vac
Frequency 50 Hz 50 Hz 50 Hz
Power Consumption - Frost Protection 165 W 165 W 165 W
Power Consumption - Normal Opteration 57 W 57 W 57 W
Warranty Details (Domestic)      
Parts and Labour 3 Years    3 Years    3 Years   
Heat Exchanger (Part Only) 12 Years 12 Years 12 Years
Pipe Connection Sizes      
Gas Connection - NG or LPG 20 mm 20 mm 20 mm
Cold Water 20 mm 20 mm 20 mm
Hot Water 20 mm 20 mm 20 mm


Additional Information

SKU 7736503243
Energy Star Rating No


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Bosch Optiflow Professional 20L NG 50°C Compliant 0 out of 1 5 based on ratings. user reviews.