I have a number of buildings that have large internal heat gains like gyms, weight rooms, dance studios, pools, etc. Currently we run our ventilation controls solely on time schedules. We put co2 controls on a few units last year and are seeing pretty good reduction in energy use and cost.
I'm thinking that co2 is more appropriate then occupancy sensors because of the elevated co2 release during physical activity. Also I feel that occupancy can lead to excessive cycling with areas like locker rooms and break rooms where people walk through often, but don't stay too long.
Are the co2 sensors accurate enough and responive enough to handle all my zones?