The mistake
Confusing 'facing' with 'location'. Eight Mansions asks which way you face and where key features sit, not merely which room you are in. A small turn of the chair can realign you with a favourable direction for free.
What the classics actually say
Your four good directions each serve a purpose: Sheng Qi (success and wealth), Tian Yi (health and helpful people), Yan Nian (relationships and longevity), and Fu Wei (stability and clarity). The four bad ones range from mild setbacks to total loss.
Getting it right
You apply your directions by facing and placement — face your Sheng Qi for important work, sleep with your head toward a good direction, and site your desk and door where the personal energy supports you.
Try it yourself: Lucky Directions (Eight Mansions) is free on FengMaster, computed to the letter.