We had the same issue. We bought the rig in my signature. As noted, be sure to include the A/C in your calculations. Ours just fits our 12 ft door.
Be sure to also check and measure the height of the bottom of the garage door when open. I had to make sure I had my opener cranked to open as far as it would go.
We love our unit. I don't even think about it not as I go through the door.