Separate core size from overall size
State whether width and height refer to the finned core or the complete assembly. Include thickness and identify whether tanks, pipes, seals, and brackets are included in the overall measurement.
Document the pipe layout
Record inlet and outlet outside diameters, center-to-center spacing, pipe length, angle, orientation, bead or flare style, and any valves or additional fittings. Photograph the part from the front, rear, top, and connection side.
Confirm the vehicle
Provide make, model, chassis, production year, engine, and left- or right-hand-drive market where available. HVAC housings can differ within the same model family.