You are right. We would also like to know what to expect at the project when we open AC grills and access panels.
However, AC system conditions in local premises often differ from one to another, even in the same building — AC units from different brands and types, different operation and maintenance periods.
The weight of AC motors, that we dismantle to wash, varies 3 to 4 times, and there are 1 to 4 of these in the flat.
Electrical cable and duct conditions, AC unit access, and grill sizes influence the price but not more than 50% of the benchmark price indicated above.