Why a CO2 sensor and a reset sequence aren't automatically "the more efficient option" — and why the answer depends entirely on how a space is actually used.
It's tempting to treat demand-controlled ventilation as a strict upgrade over a fixed minimum outdoor-air rate — newer, smarter, sensor-driven, so obviously better. That framing skips the actual mechanism. Both strategies exist to answer the same question — how much outdoor air does this space need right now — they just answer it differently, and one of those answers only pays off when the honest answer to "how many people are actually in here" keeps changing throughout the day.