I was cold and sticky at the same time

I put on a cardigan in July and still felt sticky. My response was to lower the thermostat again. That produced a colder cardigan situation without explaining why the room felt damp.

I started recording room temperature and relative humidity together, using the same sensible measuring location each time. The two numbers told different parts of the story.

An air conditioner removes heat and can remove moisture as it operates. ENERGY STAR warns that an oversized room unit may cool quickly without adequately reducing humidity. Central-system sizing, operation and airflow can also need assessment when comfort remains poor.

That does not mean a humid room proves the equipment is oversized. I described the short operating periods I had noticed and asked for a system assessment rather than a bigger unit or an arbitrary fan adjustment.

Health Canada recommends controlling moisture sources, repairing leaks and using ventilation and dehumidification appropriately. I checked ordinary things: windows left open in humid weather, laundry drying downstairs, bathroom extraction and evidence of water entry.

If a basement is damp, its moisture problem may need attention even while the upstairs thermostat is satisfied. Lowering the whole house temperature is not a substitute for finding a leak or choosing suitable moisture control.

I brought the readings and the household observations to the service visit. I left the equipment's airflow settings to the technician; changing them without measurements could create other problems.

The cardigan went back into the drawer when we stopped chasing humidity with a colder setpoint. I still checked the readings, but they were now helping me describe the problem instead of giving me another number to turn down.