We contacted Motorhome-World with your query. This is their response.
“Motorhome-World uses a 19ltr Hansen geyser throughout our models, it is a locally manufactured geyser, specifically for leisure use. The unit heats by means of 220v or LPG. 12volt is not considered for efficiently heating water.
With the 220v/LPG unit you will need to make a hole in the camper / motorhome walls as to vent to excess heat and burnt gasses outside. Should you not wish to make any hole, there is also a 220v only unit available.
Recommended (as per supplier) with this geyser is a 12volt pressure water pump with max. pressure 1.8bar and a water pressure expansion tank to stabilize any fluctuations in pressure.
you can view / buy the unit online at http://www.parasolsa.co.za or visit any of our branches to do the same. Price R6,200 incl vat for the dual 220v/LPG geyser.”
Hope this helps
The CaravanSA team