The unit works on a large 12v battery which powers lights and the pump which flows through a gas geyser. The Gas geyser ignites automatically once the hot water has been turned on.
If the unit is attached to a fresh water supply with the exit pipe put in a drain and the electricity connected as well as an unlimited gas supply then you are able to shower non stop.
Hot water construction showers perfect for construction sites for extended periods. All the unit needs is a pressurised water supply and a drain for the waste water to disperse.
These units work on gas so as long as there is a pressurised water supply as well as a gas supply, they will function perfectly.