There is a lot of stainless in these things...but best to double check before you start on the project. They are usually suspended by cables. The only one I took out (it was only 12 feet), I brought my lift to support the whole thing, and then cut the cables. There is some ductwork to deal with too, but it can be removed pretty easily.
I'll just say that this isn't a super easy removal process, and you could cause some major damage removing it. The one I was taking out was in a building set for demolition.
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