According to Vastu Shastra, the ancient Indian science of architecture, west-facing houses can be beneficial if certain guidelines are followed.

Here are some tips to unlock the positive energy flow in a west facing house vastu:

1. Entrance: The entrance to the house should be in the north or northwest direction. Avoid having the entrance in the southwest direction, as this can bring negative energy into the house.

2. Living Room: The living room should be located in the northeast or northwest direction of the house. Avoid having the living room in the southwest direction, as this can create a heavy and negative energy in the house.

3. Bedrooms: The master bedroom should be located in the southwest direction of the house, and should be larger than the other bedrooms. Other bedrooms can be located in the northwest or southeast direction of the house.

4. Kitchen: The kitchen should be located in the southeast direction of the house. The cooking stove should be placed in the southeast corner of the kitchen, and the person cooking should face east while cooking.

5. Bathrooms: Bathrooms should be located in the northwest or southeast direction of the house. Avoid having bathrooms in the northeast direction, as this can disturb the positive energy flow in the house.

6. Windows: Windows should be placed in the east or north direction of the house. This will allow for the flow of fresh air and natural light into the house, creating a positive and vibrant energy.

7. Colors: Choose light and soothing colors for the walls, curtains, and furnishings in the house. Avoid using dark and bold colors, as these can create a heavy and negative energy in the house.

By following these Vastu tips, you can create a positive and harmonious energy flow in your west-facing house. This can help to promote health, happiness, and prosperity for you and your family.