Excuse me but why are you turning your outside air conditioning unit into a Mummy?
Why do people wrap them up for the winter?
This only creates a nice home for rodents who may otherwise look elsewhere for a winter home. You see it every year. They wrap them up in the winter and then scrub off the mold that grew in the dark come spring.
It’s not only a waist of time it may actually cause your unit to rust quicker than if it where able to stay “air dry”. Save your efforts and plant some shrubs or tomatoes instead.