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In the first study, environmental conditions in an air-conditioned barn were compared to those in an adjacent feed barn with a sprinkler cooling system. THI in the air-conditioned barn was always below 72. THI in the fan and sprinkler barn was never below 75 during daylight hours.

In the second study, a free stall barn with large fans in the end wall of the barn, curtains on the side of the barn and an insulated roof was monitored. Sprinklers over the feed alley were used to wet the cows. Airflow from the large fans evaporated the water from the cows, just as in the usual fan and sprinkler system that uses many smaller fans spaced down the feed lane. This design was compared to an open free stall barn with sprinklers over the feed space but using large blade (7 m) ceiling fans. THIs below 75 were never observed in either the tunnel ventilated barns, or the barn with large ceiling fans.