Propex camper van auxiliary heater. This was in my VW Campervan and I have up graded it to a new one. They are now called Heat source, see photo of box. This one does only blow cold air but I could not find anyone to fix it so upgraded as want a Habitation certificate on completion of my full restoration project. comes with some hoses, vent, and controller. My replacement was very expensive and have seen ones on e bay re commissioned at about half the price of a new one which is about £600.
eBay