Partitioned off a portion of the garage, insulated it and installed work benches. Got this air conditioner to tame the heat. It is 97+ on the other side of garage which is just insulated. After a week of 'cooling' switched to econ mode and it has held a steady 75 degrees. Room is about 12x20x12. I got the LC sleeve and installed both in about 3 hours. Instructions for the sleeve install are not very clear but not hard to just look at the thing and figure it out. I'd recommend waiting to permanently install (screw-in) the sleeve until you test fit the air conditioner to get the right amount of overhang for your trim. I'm very happy with the unit so far, its been running about a month with outside temps in the 93+ range with 103 heat index.