1. Awning Window (75%)
Opens outward from the bottom, hinged at the top.
Allows good airflow while blocking rain.
Suitable for bathrooms, kitchens, and high-level windows.
Ventilation is good but not maximum.

2. Casement Window (90%)
Opens outward like a door hinged on the side.
Provides the best ventilation among common windows.
Can catch wind and direct fresh air inside.
Very good for living rooms and bedrooms.

3. Louver Window (75%)
Made of horizontal glass slats that tilt open.
Allows continuous airflow even when partially open.
Common in toilets, staircases, and utility areas.
Ventilation is good, but sealing is weaker.

4. Sliding Window (45%)
One or more panels slide horizontally.
Only half of the window opening is available for air.
Easy to operate and space-saving.
Ventilation is moderate.

5. Single Hung Window (45%)
Bottom sash moves up, top sash is fixed.
Simple and traditional design.
Limited airflow compared to casement or awning windows.
Ventilation is moderate.

6. Double Hung Window (45%)
Both top and bottom sashes move up and down.
Allows some control of airflow direction.
Easy to clean and maintain.