Where is the best location to install the PRO TH4210D thermostat?

The thermostat should be installed about 5 feet (1.5 meters) above the floor in an area with good air circulation at average temperature. Avoid locations affected by drafts, dead spots behind doors or corners, hot or cold air from ducts, direct sunlight, radiant heat from appliances, concealed pipes or chimneys, or unheated/uncooled areas such as an outside wall behind the thermostat. (Page 3)