1,100 feet height is a tall building. The eQUEST default for infiltration is 0.038 cfm per sqft of envelope area. You can break the building into 3 or more shells and assign different infiltration rates. You can download my attempt at dealing with this problem from http://bepan.info/engg-calcs and open ?4b - Bldg Stack Effect, Wind Press + Envel Leakg Calcs? Varkie
