Trying to figure out how to turn the volume calculation off of a fire protection system. The proplem: the larger the system the longer it takes to make connections / fittings. The smaller the system the faster it takes to create connections / fittings. I believe the reasoning for this is that REVIT is constantly doing a volume calcuation to determine the volume of the system. I'm assuming that if that feature is turned off then it would not take as long....any thoughts?