Maybe this is more for the controls folks but here it goes......
Tomorrow I'm to meet the controls guy for a building we take care of. Some work was done on the chilled and heating loop valves. This office building sits empty and we are to keep it at a semi steady temp in order to keep it alive - ceiling tile wont droop and wall paper stays on the walls type thing.
The controls guy insist the air leaving the handler is to be set at 55 deg and the VAV's with re heat loops heat the air back up. To me this is a tremendous wast of energy. Why would he want to do this on a empty building...why would he want to do this on a occupied building? There are 8 main air handlers in the building. This will be the only one set up like this because of the new controls. The others the leaving air is determined by the space temp.
I currently have each air handler coming on for two hours a day in order to circulate air and dehumidify. Each unit is on at a different time.