Green built buildings are costing more to maintain and are creating whats called sic buildings,during construction they have to have a pressure test and during this test the building must maintain a certain amount of pressure created by using high velocity fans. Usually two to three years after completion you have to go in and do total mold remediation, simply because the building is sealed so tight it cant breath in fresh air. Even bringing in an outside source of fresh air don't usually help.
Modern buildings have HVAC systems that use computer controlled air handlers to induce a preset number of air changes per hour. In our building we have energy recovery heat exchangers to reclaim the energy from the exhaust air and use it to treat the incoming fresh air. We also set and maintain relative humidity with a separate air handler that is tied into the main air trunks with duct valves. This sort of system has been standard in other parts of the country for a decade and I cant believe it is not common practice to install on any new commercial construction.