Comments about Fantech Low-Profile Elbow for 4" Duct (FEL4):

I really needed one like this to have either a 4" round end on both ends or to angle 35-45º up to allow the duct to more easily get over the top sill and into the attic to the new bath vent--or preferably both changes.

Comments about Fantech Low-Profile Elbow for 4" Duct (FEL4):

Would be great for ventalation, very compact elbow. Fantech says plastic will melt above 140F so cant use it for residential heating system.

Comments about Fantech Low-Profile Elbow for 4" Duct (FEL4):

These would work great for flexible tubing, but I was planning on 4 inch rigid vents. The output of the fitting is oval shaped though, so it won't work for me. Would be fine for its purpose, just make sure you don't need rigid pipe.

Comments about Fantech Low-Profile Elbow for 4" Duct (FEL4):

Was installing new bathroom exhaust fan, no fan was installed before so I had to find a place to run the duct to exit outside. Did not want to cut into roof. The soffit was best other option since I could get to it. Using this LP elbow I was able to connect the bath fan duct and then connected this elbow to the Soffit Bath Fan Vent item 3840 so I could direct the exhaust out of the attic in any direction. Worked great for this install requirement. You never want to just drop your exhaust duct over the built in attic soffit vent.

Comments about Fantech Low-Profile Elbow for 4" Duct (FEL4):

This worked great in a tight soffit. Only minor drawback is the mounting ears could be bigger and a little stiffer. I would use this part again though, the pro's definatly outweigh the con's.