Originally Posted by
craftyringwiseveteran
1. Turn on the return fan
2. Don't believe anything your operations staff is telling you (they're the ones who turned off the return fan?)
3. Find out where the actual static pressure sensor is in the duct. (The rule of thumb is 2/3 of the way out in the duct.)
4. Spend some money and find a good air balancer (best of luck on this one!) and have him figure out what pressure you need.
Good luck, it sounds as if you may have one of those golf tee, duct tape, and chewing gum operation staffs.