Wiring Diagrams For Home Improvements - The Installation of Airtronic D2 Air Heater. What is said to be a 3 hour job in a truck (Espar installation video), took me about 4 man-days plus several days of thinking and looking in the A'van Applause 500 for the installation.Where to locate the Heater. The heater unit is compact: Connections are: Hot air ducts 60 mm diameter, both inlet and outlet. The math of conduit-bending that we will discuss here comes from two sources. Some of the math is already built into a common hand bender device, and the rest of it involves the geometry of a triangle.. Review of the Mickey Thompson ® Baja MTZ. When you look across the board at the major manufacturers of Mud Terrain tires, Mickey Thompson, who is owned by the Cooper Tire & Rubber Company, is one of the serious contenders for top rated Mud.