Bosch WRD11B31 11 Litre Battery Ignition LPG Gas Water Heater

Bosch WRD11B31 11 Litre Battery Ignition LPG Gas Water Heater -
Bosch WRD11B31 11 Litre Battery Ignition LPG Gas Water Heater -
Bosch Gas Water Heater Solar Kit
Bosch Gas Water Heater Solar Kit diagram

Bosch WRD11B31 11 Litre Battery Ignition LPG Gas Water Heater

Regular price R 9,285.00 incl. VAT Sale price R 6,878.00 incl. VAT Save R 2,407
R 5,98087 excl. VAT
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Battery Ignition
Two D cell torch batteries provide the power to open the gas solenoid and fire the igniters when the unit detects water flow. Once the gas is ignited, the igniters cease firing and the water heats up rapidly.

Saving with battery operated models
If the pilot flame burns 24 hours per day the potential saving is 80-90kg of gas per year. That is as much as R450 per year (48kg gas for R448 as a refill without deposit for bottle; 2x48kg = R225 + R450).

The Multi-point Hot Water System
With a multi-point hot water system, all hot water points are supplied by a single water heater. The amount and temperature of the water used can be individually controlled at each tap unit. This type of arrangement is best used where the piping runs to the various hot water outlets are not excessively long.

The Single-point Hot Water System
In this case, separate gas instantaneous water heaters are installed directly at each hot water point – over the kitchen sink and the bath, for example. The advantage of this arrangement is the immediate availability of hot water at the point of use.


  • Powerful - However large or small your hot water requirements are, Bosch has the appliance with the output to suit.
  • Economical - Instantaneous water heaters only use energy when hot water is used
  • Safe - The built-in thermoelectric flame-failure device prevents gas leaking if the pilot light goes off.
  • Convenient - Hot water wherever and whenever needed.
  • Compact - Attractive and compact design saves space and makes these appliances ideal for both old and new properties.
  • Versatile - Whichever option you choose - point of use or central supply - Bosch has the right water heater for you.

Product Specifications

  • Model: Therm 4000 WR11-B
  • Output (kW): 19,2.
  • Ignition type: Battery.
  • Warranty: 12 months

Gas data

  • Gas type: LPG.
  • Gas consumption: LPG - butane/propane 1,75kg/h.

Water Data

  • Max permissible water pressure (bar): 12.
  • Minimum operating pressure (bar): 0,1.
  • Flow range (l/min): 2 - 5,5.
  • Temperature control at minimum setting: Ambient +25°C (Flow Rate: 4.0 – 11.0 l/min).
  • Temperature control at maximum setting: Ambient +50°C (Flow Rate: 2.0 – 5.5 l/min).
  • Applications: Shower and basin.

General data

  • Voltage: N/A.
  • Frequency: N/A.
  • Dimensions (h x w x d) mm: 580 x 310 x 220.
  • Weight (excluding packaging): 11 kg.


All solar products, power systems, water heating and gas products and their components must be installed by appropriately qualified personnel. All installations must adhere to local wiring regulations and standards. Sustainable Online will not be held liable for any product malfunctions as a result of incorrectly installed systems.

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