Air rotation units

Air rotation units

The units that use outside air to condition a building. However, the units only bring in outside air during occupied times. When the building is not occupied, the ARU rotates the higher warm air with the lower cool air in the space, keeping the building satisfied without taking into account the necessary air quality requirements based on occupancy.
References in periodicals archive ?
The facility already had two big Johnson air rotation units on the sides of the 142,000 square foot building--one to pull in air, the other to expel it.
Interestingly enough, last year we were able to keep the Johnson air rotation unit at the back of the building set to 63 degrees.