How to remove kitchen exhaust duct

Hi,

I'm rehabbing a condo, and I'm going to be installing a drop ceiling with can lights (the thin ones). I will be taking out a permit. The new ceiling is going to be about 5in from the original one.

My question is, how do I go about removing the exhaust duct system and patching the hole thats up to code. I don't want the inspector to pass by and say something. I will be installing a ductless microwave after.

Thanks,

 

That's like taking a giant step backwards. It would be an absolute sin to remove it.

I don't understand why it can't stay.
What does the ceiling have to do with it ?

 

Just in case you aren't aware, all microwave hoods are shipped from the factory in recirculating mode. The blower needs rotated to vent up to the outside.
Also the MW damper is 3.25 x 10, which is the duct you have. As said above, it doesn't make sense to cap off the duct if it can stay.

 

I know, I actually want to keep it but was recommended by a GC that is a lot easier to get plans approved, pass inspections, and more economical if we don't have to build a suffit around the duct.

My only consern if I do try to build the suffit, is that I dont know if the city wants me to building a 2x4 frame around the suffit (with drywall on the side & bottom on the suffit.... I dont know how I would be able to install drywall at the bottom of the suffit since theres no space) or if I can just put 2 2x4s right at the top of the cabinets going from wall to wall and from the top of the cabinets to the new ceiling and hang the drywall there to close the duct

And trying to talk to the plans reviewers at the city of miami is a pain.

Please let me know if it was your project how would you close up the duct

 

I'm not referring to the ductless microwave.

I'm referring to removing the duct so that the new unit needs to be used in the ductless mode.

 

So you're saying the new cabinets will have an open soffit above and the duct will be visible if it stays?
When I have an open soffit, I just build a wooden box (1/4" ply) around the duct using the same material and trim as the cabinets. If you want to seal it off I would use sheet metal to form a box top like cap and tape it with metal duct tape.
Inspectors around here will not accept cloth duct tape.

 

The cabinets are staying. They're getting painted and new doors, so I have to work around the existing cabinets