New to the forum so "Hello to every one"
I am getting some quotes to have an 8.5ton a/c unit installed and wanted to better understand the need for large ducting.
In one of our other buildings which is much larger there is 12" ducting running from 3 different a/c units. which are cooling a larger area.
In one of my quotes the ducting is almost 3 times bigger than the 12"
This unit is bigger than the other ones but is cooling a smaller area why do I need such large ducting? Also do I need as big ducting for the return? lastly does it matter if the ducting is installed near the roof or could it be down low? (being the unit will be installed at ground level and the ducting will have to go through the wall.)