HomePolicy » Air Conditioning Air Conditioning By Chad Bauman • August 19, 2024 You are permitted to use a freestanding, evaporation type, room cooler if the unit does not require ventilation to the outdoors. Fans and air coolers must not exceed a combined 80 watts in a residence hall room. All units must be powered directly from a wall outlet. Plugging an AC unit meeting the requirements into a power strip is prohibited.