The more I read this forum the more I appreciate this line of work and enjoying learning about it.
I have a question about the different types of ducting. In particular, I was informed that my 16 SEER unit would not actually reach that level b/c of the type of ducting I have (builders grade, I think he said R5?).
Would someone be able to provide the different types of ducting material and how it relates to achieving the stated SEER rating of a particular system? If there are specific details which seperate the different types what are they? My assumption is that they provide better insulation and possibly even provide a different material which makes up the inner shape?