Thermostat

What a thermostat controls

A thermostat reads room conditions and calls for cooling, fan operation, or sequence changes. In simple split systems the control may be integrated into the unit. In more complex systems, thermostat logic can influence zones, schedules, setbacks, and user overrides.

Why placement matters

Thermostats should sense representative room conditions. If they are placed near direct supply air, behind curtains, beside hot glazing, or in dead corners with poor airflow, they create false readings and unstable comfort.

Typical late-stage failures

• The thermostat sits where furniture or decorative panels restrict airflow.
• Control logic does not match the actual room use after interior changes.
• Users receive no practical explanation of setpoints, modes, or overrides at handover.

What to inspect

• Final location relative to diffuser throw, glazing, and occupancy zone.
• Correct labeling and user interface logic.
• Commissioning records that prove the thermostat responds as intended.