Users have reported needing only one UAP for average-sized offices, but of course, all offices will have different needs depending on size, building material, wall distribution, number of floors, environment, among others. Use the comparison charts for UAPs
and the device's Datasheets to select an AP that is enough to meet your needs. You can always start with the minimum number of UAPs, and add another if necessary. The UniFi Network Controller allows for easy adoption and scalability. You can conduct a wireless site survey
to get a true idea of the different areas of signal strength in the building. Another tool that is useful to spot the need for extra access points is the Map feature. Find information about the Map feature and how to use it in the UniFi User Guide
, Chapter 6: Map.