Do you have the blue binder that came with the TM? All the magic info is in there.
My 2006 2720SL has an airco by RV Products, Series 9000, and as Rumbleweed posted, yours is most likely the same. They haven't changed much recently. By the way, your original description of "slats" was pretty good. The manual for my airco calls them "louvres", which is also pretty good - but I think "slats" covers it better.
Bill
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