Why is my new Altura 68" fan so slow moving on high speed?
Your new fan is larger, which means it should be able to move more air at the same speed. As you say, it moves more air (8435 CFM, up from 7344). Who cares how fast the blades turn? If anything it's probably quieter to have a slow, large fan vs a small fan that has to spin a lot faster to move the same amount of air.