A special spacer section (25mm bore)fits into the top hose and the control unit has a heat setting screw to calibrate your own water temperature. This whole unit will control your existing fan(even a Kenlowe) The top hose will have to be cut to fit this unit but all clips and fitting instructions are supplied. This part however is not made specially for the mini and is really difficult to fit into the S top hose
GRH247 owing to the hose shape and length, and is therefore not advised unless you prepared to plumb to your own design.