I have a generic technical question about commercial DDC HVAC and energy savings: Can raising the summer temperature settings on a DDC system actually INCREASE operating costs? In other words, if the discharge air temp is constant at 55 degrees, do you actually need to add more reheat at the VAV boxes and thus burn more energy to keep a higher office temp? Or does the system simply run less for shorter cycle times, and it really does save money to raise the thermostat? (I am a facilities manager at a large company trying to save money by raising thermostats a few degrees. Unfortunately, I'm a civil and not mechanical engineer, so I can't say intelligently whether we'll save money or not. We have many different building types and HVAC systems, so my question is not specific to any particular setup - just asking in broad terms).