Abstract: A fluid heating system intended for use in recreational vehicles that circulates glycol in a system loop with various heat sources and other devices that distribute this heat to an enclosure or a domestic water system. It has a system controller operationally connected to a remove tactile display unit that allows for the input of the operation parameters to the system controller. The control unit is operatively connected for data and signal transfer to the user's cell phone via a non-internet connected localized wi-fi network. This provides the user with system status information, fault codes and allows selected operational functions and resets to be remotely initiated that heretofore required local manipulation. It also incorporates altimeter to allow the furnace controller to maximize its burn efficiency.