Stale, sluggish energy is bad energy and can manifest itself to bad health and bad luck. This type of bad energy starts with clutter, stuffy enclosed spaces, and can persist in rooms that have been occupied by someone who has been ill, or in a room where the occupants have had regular arguments or disagreements.
There should always be a balance of Yang (free flowing positive “qi” or “chi” energy) and Yin (negative, bad energy in any room, space etc). Too much bad energy can result in poor health and long-term physical illness or depression.
To get rid of bad energy, de-clutter your house, clean it, organize it and let the energy flow using the fen-shui principles.