I don't have specific info on your app, but I do have the current numbers for the 16kW.
The surge rating for that one is 130 LRA.
It may be different on yours since there is a derate on the older ones.
Since it's so close I would put a soft start kit on the AC.
Check with your gas provider! Our BTU content is so high here, we get 100% full load on NG! De rating is based on national averages! We get 100% operating amperage on NG! When I'm less than 1 kW on hitting my mark I use the hand written load calculation; I know the different fuel suppliers here, and some don't need to be de-rated!