Prioritize 100% Copper coils. They are more resistant to corrosion, easier to maintain, and have a lower failure rate compared to aluminum.

Add 10–20% capacity if your room has high ceilings, faces direct sunlight, or is on the top floor of a building. 2. Choose Between Inverter and Non-Inverter

Especially for bedrooms, look for models with noise levels below 40 dB.

Look for higher star ratings (e.g., 5-star) for better efficiency. For heavy summer use, a 5-star unit can significantly lower monthly bills compared to a 3-star model.