Maximum comfort with maximum energy saving. If you’re looking for a simple, reliable and efficient solution, you’ve come to the right place. The elegant design of the unit enables it to be seamlessly integrated into any kitchen with consummate ease. Besides the elegant cover, an ignition switch, a luminous indicator to show that the flame is present in the water heater as well as a red indicator light to signal a low battery are present. As our customers comfort and safety have always been our highest priority, safety measures included are Flame control and security by ionisation Temperature control limiter. All it takes to fire up a Therm water heater, is the opening of a tap. Ignition is achieved with the Bosch Hydro Power ignition system making use of the most clean and economical energy source possible the force of the water is responsible for the ignition of the burner.

As our customers comfort and safety have always been our highest priority, safety measures included are:

Hydro Generator Ignition (No batteries required)

Gas instantaneous water heater; 18 liter per minute capacity

1-year warranty, providing the geyser is installed by a qualified & registered gas installer.

This unit is the largest of the Bosch mechanical series (no electricity required)

Manufactured in Portugal.


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.

67 in stock

SKU: WRD18G31 18L Hydro Category:



The ignition pressure is 0.35 bar, making it the lowest of all appliances of this type. Simply put, a Bosch ignites where others cannot.

Output (kW): 30.5.

Max permissible water pressure (bar): 12.

Minimum operating pressure (bar): 0,2.

Flow range (l/min): 2 – 8.8.

Gas consumption: LPG – butane/propane 2.79kg/h.

Temperature control at minimum setting: Ambient +25°C (Flow Rate: 17.6 – 14.0 l/min).

Temperature control at maximum setting: Ambient +50°C (Flow Rate: 2.0 – 8.8 l/min).

Applications: Bathroom and Kitchen.


Product Assembled Dimensions : (D)475mm x (W)270mm x (H)770mm

Product weight 19,75 kg

Package Dimensions: 490(D) x 290(W) x 790(H) mm.

Package Weight:22,45Kg


1 x Gas Water Heater

Instruction manual

2 x knobs (gas and Water.)

Warning and installation procedures.

Flue and cap are optional.

Batteries x 2 (2xD 1.5V)

Additional information

Weight 22,45 kg
Dimensions 490 × 290 × 790 mm

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