The correct answer is:

High outdoor humidity worsens air conditioning efficiency, low outdoor humidity improves air conditioning efficiency.

Explanation:

Air conditioners work by removing heat and moisture from indoor air. When outdoor humidity is high, there's more moisture in the air for the AC to remove. This increases the workload on the system, making it work harder and less efficiently. Conversely, when outdoor humidity is low, there's less moisture to remove, allowing the AC to cool more efficiently.


Here are several ways to improve air conditioning efficiency in humid climates:

✅ 1. Use a Dehumidifier

A dedicated whole-house or portable dehumidifier reduces indoor humidity, easing the load on your AC and making it more efficient.

✅ 2. Install a Two-Stage or Variable-Speed AC Unit

These systems adjust their cooling output more precisely, allowing for longer run times at lower speeds, which improves moisture removal and comfort.

✅ 3. Keep Filters and Coils Clean

Dirty filters and coils restrict airflow and reduce efficiency. Clean or replace filters every 1–3 months and ensure evaporator and condenser coils are clean.

✅ 4. Seal Leaks in Ducts and Windows

Leaky ducts and poorly sealed windows/doors let in humid air from outside. Sealing these prevents humidity intrusion and reduces AC workload.

✅ 5. Use Proper Ventilation

Run exhaust fans in kitchens and bathrooms to remove humid air at the source.

✅ 6. Set the Thermostat Wisely

Avoid setting the thermostat too low. A temperature around 24–26°C (75–78°F) is often sufficient for comfort and energy efficiency.

✅ 7. Limit Indoor Moisture Sources

Dry clothes outside, avoid long hot showers, and cover pots when boiling water — these all reduce moisture generation indoors.