Your HVAC system moves air through filters and equipment. Dirty coils can reduce cooling and increase runtime. Airflow problems affect performance. Drain problems can lead to water damage.
Check the equipment, not only the room
A technician can inspect the filter, blower, coils, drainage, and airflow. What is found at the equipment matters when deciding whether maintenance or repairs are needed.
Use air readings as context
Measurements over time help show changes in the conditions being measured. A particle spike does not prove that a filter is clogged. A humidity change does not identify a failed component.
Choose an action connected to a finding
Ask what the inspection showed, what the proposed work addresses, and how the result will be checked. Better filtration must suit the system’s airflow requirements.
WHAT THE EVIDENCE SAYS
Research behind this question.
A comfortable room can still have a wet surface
Illustrative air and surface conditions · Mainstream Engineering · eighth edition, January 2016 · PDF page 49
At 80°F and 50% relative humidity, the dew point is approximately 60°F. Surfaces colder than that can collect condensation.
This is a physical example, not a mold detection threshold or a recommended thermostat setting.
Scaringe · Indoor Air Quality and Mold Remediation Service Techniques, p. 49 · Study context