Above you will see the bottom circuiting of the AAON RM-07 condenser coil and the dropped tubes that starts this intricate circuit. As in all of our direct replacement coils circuiting and fins per inch are duplicated to match the exact capacity of the existing OEM condenser coil. We then are able increase our materials of construction to .020" copper tube wall and .008" aluminum fins - manufacturing the highest quality direct replacement condenser and evaporator coils for all manufacturers. TRANE - CARRIER - Lennox - York - McQuay - Munters