No. Building Codes typically refer to a standard like ASHRAE 62, which basically prescribes a fresh-air rate for a space by size and occupancy. Demand based ventilation is not common in my experience (small commercial buildings).
Probably right. Many clients view it only as an added expense for equipment. Beyond that, there is a certain type of client/owner who is skeptical of any automation beyond a bi-metallic thermostat.
