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You wont know unless u take the cover off and look. Our Montana is a 2009. Called Keystone the rep took my ser no and looked it up. Said it was not pre wired or ducted. Went and checked. Yes it was wired and ducted for 2 nd air. Had the 2nd air installed a year ago ducted and are very happy with it. If u duct it, u can run the bedroom during day and livingroom one during night and u never hear it sleeping or watching tv unless u need both. Ducted is the way to go if u can.
Also someone on the MOC recomended we buy a 15,000 btu. Was not that much difference in price. We did go with the 15,000. We have no problems cooling our unit in 90 + heat and no shade at the ocean.
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