Home - Alfmeier Friedrichs & Rath Welcome to Gentherm, the global market leader in cutting-edge thermal management and pneumatic comfort technologies for the automotive industry and a leader in medical patient temperature management s Alfmeier Friedrichs & Rath concentrates on fuel management and thermal management solutions. Alfmeier also focuses on gas & air flow control, brake vacuum support, crank case ventilation as well as seating comfort. Our core production technology is precision plastic injection molding.