This will NOT AFFECT THE VIVARIUM AREA. This outage will also affect all exhaust to building, this includes all fume hoods, room pressures, heating and cooling to all areas. During this outage, all attempts will be made to stabilize general air pressures on floors 7 thru 11 only. This outage is needed to upgrade the main exhaust systems serving these areas. In case of inclement weather, the back-up dates are 12-13-2014 and 12-14-2014 same times and affected areas.