ECN Forum Forums General Topics of the Trade General Discussion Area Hood motor conduit in duct?

Often those "mushroom ventilators" are connected to a round duct the size of the actual opening in the bottom of the fan, or have no duct at all attached. This leaves the 3/4" EMT sized chase open below.

They are a big pain to wire with a roof penetration, but mostly because getting a LT flex into them requires some "stunts".