We are a leading wholesale distributor providing the best in class HVAC/R equipment, parts, and supplies to licensed HVAC/R contractors in the Southeastern United States. With 25 locations covering Alabama, Georgia, and Florida, chances are, if you are in need of HVAC/R parts or supplies there is a fully stocked Wittichen branch near you.. -HVAC parts and supplies - Heat Pumps - Walk-in Coolers - Diffusers - Heat Exchangers - Thermostats - Compressors - Air Cleaning Products - Air Handlers - Humidity Controls