Bank branches operate long hours under variable occupancy, with HVAC systems typically running on fixed schedules that bear little relationship to actual footfall. The outcome is predictable: CO₂ accumulation during peak hours, over-ventilation when the branch is quiet, and energy consumption that does not track demand.

Across a distributed branch network, this represents a material and addressable cost, alongside growing obligations around ESG disclosure and green building certification that require verifiable, continuous IAQ records.