Joe,

I'm sure you also wrote up that a/c condenser unit under there.

Also, that metal grille in the opening above that exhaust is going to get "HOT", just like the wood that Bob H. is talking about would. While the metal may not catch fire, it could cause burns when touched. The grille is also resting on wood, which can dry out, rot out, and otherwise become easier to ignite over time (I'm sure Bob H. has that term, I'm drawing a mental blank on that word right now).

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Jerry Peck, Construction / Litigation Consultant
Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
www.AskCodeMan.com