What we should know about the number of blades for ceiling fan? 3 blades vs 5 blades, which one provide better airflow and efficiency? Does the size of blade matters too? why? How about the height of fan rod?

How can we determine the fan size based on sf ft? Let say I have room size as below, how many inch fan size should I use.
Living room with 350 sq ft = ?? inch fan size
Master room with 145 sq ft = ?? inch fan size
Room 2 with 95 sq ft = ?? inch fan size
room 3 with 66 sq ft = ?? inch fan size

How about blade materials? ABS vs plastic, how can we make a choice?

This post has been edited by goolie: Jul 26 2023, 08:57 AM