Product review (5 stars): But it looks really nice. Can we transition the exhaust to a 4" ...
We have not installed it yet. But it looks really nice. Can we transition the exhaust to a 4" pipe or do we need to use 6" pipe?

Also, has anyone tried to verify the ETL listing? I went to the intertek website and could not find any certification for HOTENERGY!

I am interested in the electrical ratings it was approved for.