With June behind us, we have officially entered the cooling season, and you may have noticed that the tables have been modified to concentrate on cooling-related data. These changes include some new terminology related to the ventilation cooling loads.
As pointed out by Douglas Kosar in his article, "The Answer is 3" which appeared in the July issue of Engineered Systems (page 60), the "ventilation load index" or VLI, is a fairly new term that is gaining popularity in our industry. It was introduced to emphasize the difference between the sensible and latent ventilation loads (in ton-hrs/cfm) of outside air introduced inside to a space neutral condition (75 degrees F/50% rh).