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Meeting thermal comfort requires both appropriate design and ongoing verification. ASHRAE 55 provides the framework for acceptable conditions considering air temperature, radiant effects, humidity, air speed, clothing, and metabolic rate. Installing permanent sensors and trending data via the BAS reveals patterns (e.g., seasonal drift, asymmetric radiation) and enables proactive tuning. Providing local controllability—zoned thermostats, operable windows where appropriate, or task conditioning—accommodates varied preferences and reduces blanket setpoint changes that waste energy. Locking setpoints undermines satisfaction and may prompt space heaters or window opening, increasing loads. Sole reliance on surveys lacks real-time diagnostics; feedback is useful, but actionable control requires data. Oversizing equipment increases first cost and can degrade comfort by short-cycling and poor dehumidification. A data-informed, occupant-responsive strategy supports LEED’s IAQ/comfort objectives while reinforcing energy efficiency, as stable, well-controlled zones typically demand less reheat and fewer simultaneous heating/cooling conflicts.