Indoor Comfort and Cooling

Diagnose weak or warm air with safe checks for thermostat mode, airflow, filters, outdoor conditions, and the point where licensed HVAC service is required.

Separate thermostat settings, sensor location, schedule behavior, airflow limits, weather load, and equipment faults without opening electrical or HVAC panels.

Interpret relative humidity with temperature and dew point, understand condensation risk, and choose a useful next measurement instead of chasing one universal number.

Estimate a transparent room-cooling BTU range from area, ceiling height, occupants, and sun exposure, then understand why final HVAC sizing needs Manual J.

Recognize repeated short furnace runs, record the cycle pattern, check only safe external conditions, and know when combustion or electrical service is required.

Screen a room air-conditioner capacity range from area, ceiling height, sun exposure, and occupancy.

Calculate dew point and place an indoor relative-humidity reading in useful context.