kanewolf :
Many access points are designed to radiate in a specific pattern. A ceiling mount unit probably doesn't radiate a lot upward. Don't assume a spherical radiation pattern.
I would put one AP per floor if it was me. That way all users are distributed among multiple APs and the wired network, which has more bandwidth, carries the aggregate traffic.
I'd totally agree but (something that I should have specified) the usage will be absolutely minimal. Perhaps to remote in to a computer on the third floor from the ground floor and to access files stored on the cloud (laptop and a PC on a stick on each floor).
I'm trying to save on cost, since it's not really something that needs much substance, just basic wireless connectivity. I might look at an access point on the middle and top floor and the wireless router on the bottom floor.
Any recommendations on hardware?