Yes, all RV Covers are designed with enough additional fabric in the roof section to account for any installations on the roof, including air conditioners, RV Ladders, satellite TV domes, roof vents, RV TV antennas, etc.
To get the right fit, all you have to do is select an Adco cover or Classic Accessories RV cover from the right series for the type of RV you own. Then, make sure you do a proper measurement of the length only. See our article:
For tips on getting the correct measurement. By selecting the correct cover with RV type and length, you will ensure a good fit to protect your RV investment.
To find out how to do an RV cover installation, check out this article