I replaced both my roof AC units, rented a manual material lift from Home Depot $55, it fitted in the back of my SUV for transport. Had everything ready to go up and old ready to come down, placed new units in place and returned lift before coming back to finish install. Did another on a friends rig I was on the roof with a strap tied around unit more as a safety, my buddy pushed it up the ladder, he did the work. If you do the ladder make sure the top is about level with the roof.
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