Calix Engine Heater Kit PH 750H 750w 230v Including Euro - Type F Plug Cables (60-80c) 18307501830750 Calix Engine Heater Kit with Cables PH750H 230v (60 80 C) Calix range of PH heaters are manufactured for longevity, quality and ease of installation. They can be installed passively using the thermosiphon principle, or if an optimum position isn't available then an additional transformer & pump kit can be purchased to circulate coolant through the system. An industry leading 3 year warranty is offered on all Calix products. The PH is available