Just remembered my porcelain figures of the three immortals, looking at me as I type...
This is what the book says. No disrespect to the unfortunately named god of wealth, chaps, or all your cash will mysteriously get spent!
Fuk, Luk and Sau are the most auspicious trinity of gods/deities in Chinese history and represent prosperity, authority and longevity. Fuk is the deity of wealth and prosperity, Luk symbolizes power and authority, and Sau symbolizes longevity. They are usually represented together and are known to attract health, wealth and prosperity to those who keep them and also to the environment in which they are placed.
According to Feng Shui guidelines, the Three Immortals should always be placed together on a high table or shelf in your dining or living room to attract good happiness, good fortune and long life into your home. They must never be placed low, or on the floor as it is very disrespectful to them, as well as all deities.
Additionally, they should not share the same wall as a toilet or bathroom, be placed facing the dining table as we do not want to eat while the “gods” drool looking at the food, or face the main entrance door because we do not want to “employ” them to guard our door. For protection and support in business, place them high on a shelf behind you in your office to provide protection, support and good fortune.