As a rule of thumb, if your water supply is normal water also known as fresh/ soft water, you can pretty much use any model of instant shower that pleases you; without worrying about damaging the heating element.
-6%
Original price was: KSh 8,000.KSh 7,500Current price is: KSh 7,500.
-25%
Original price was: KSh 7,500.KSh 5,600Current price is: KSh 5,600.
-6%
With Pump
Original price was: KSh 16,000.KSh 14,999Current price is: KSh 14,999.
With Pump
-3%
With Pump
Original price was: KSh 16,500.KSh 15,999Current price is: KSh 15,999.
-19%
Original price was: KSh 18,000.KSh 14,500Current price is: KSh 14,500.
With normal/ fresh/ soft water, you can use any instant shower/ heater without worrying about the element. With proper installation/ use, a good quality instant shower will serve you for a very long time.