Who We Are ADP (Advanced Distributor Products) is a Lennox International company and the #1 Producer of Residential Evaporator Coils in the USA. We are committed to providing quality solutions and true partnership to help our customers find matches that make their jobs and lives easier. ADP has been manufacturing products at our factory in Grenada, MS since 1992. Our innovative culture is fully supported by a research and development laboratory, which includes areas for testing, assembling, and