2 run the horizontal piece flat against the chimney.
Crown molding around chimney.
Be sure to measure twice and order the correct extension that matches your hood at the range hood store.
I am in the middle of kitchen reno and have a stainless chimney hood exhaust fan being installed between upper cabinets.
1 run the horizontal piece 90 off the ceiling.
Crown molding helps your zline hood fit perfectly.
With various options of design per compatible range hood series you are able to pick your style.
If you have a particularly short ceiling or high ceiling these extensions are for a customized fit.
The chimney dimensions vary by ceiling height and hood type.
No convenient way to attach that i can think of yet but possible 3 build a thin cornice box around the chimney with 1x4 and install the crown around this provides a nailing surface.
The range hood store offers the best range hood crown moldings compatible with zline range hoods.
I am thinking of taking to molding to the edge of the chimney not around it.
2 wrap the crown around the chimney.
1 just cut the crown so it buts up against the stainless chimney.
Is there a rule for crown molding.