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Slowing blowers on a chiller coils allows the air to be colder and remove more moisture. Slow the air flow to minimum necessary to cool the space, reduce fresh air to minimal amount acceptable, and set the chiller temperature as low as possible. These are the easy things. Most consider 20 cfm of fresh air as the minimum for smoking/15 cfm for nonsmoking.
The following data should help you in determining the CFM capacity of a fan for a specific room. The values are easy to calculate. There are minimum standards to follow. Here is where they are put to use. Let's take a small kitchen for an example. Say the kitchen measures 10 feet by 12 feet with an eight foot ceiling. That computes to 960 cubic feet of air in the room. The minimum requirements say that this air should be changed 15 times an hour. This means that a fan must have the ability to move 14,400 cubic feet of air in an hour. Since there are 60 minutes in an hour, we must divide the 14,400 by 60 to get CFM (cubic feet per minute). Cubic feet of 14,400 per hour divided by 60 equals 240 CFM. Nothing to it! Table Values courtesy of Nutone, Inc.