Phoenix paper mill is situated at Nanning, China where water hardness is aboye 200ppm. Every two weeks, production at the factory had to be stopped for 1 day for cleaning because of hard scale formation at different parts of the production une. A Chinese made electronic descaler was used before and proved to be a total failure. The client didn’t want to spend any more money to remove the unit from the site. The HydroPath was fitted beneath the heat exchanger, which was 3-storey in height aboye the ground, the HydroPath device was installed in April 2001.