Nobody can tell me what section of the NEC says what can and can't be done inside an air handler? These things are EXTREMELY common...not one-off oddballs. I can't believe there isn't a specific article dedicated to them. What keeps me from packing an airhandler full of combustible materials? Perhaps these are UL listed units with specific instructions from the factory on what is allowed which would explain why the NEC is silent on the subject.
