... devices to meet the changeof the temperature. The max. up or down adjustment angle of the outlets is 30 degrees. The product ... the indoor temperature are changing, the supplyairflow will be up (cold air) and down (hot air).Our ball spout is quite goodat ... , museum, etc. Theway of supplying air can be manually adjusted or electrically adjusted within ±30degrees.Inner packing:100,125,160,200 ...