Installation of RA-EB air displacement vent units is recommended mainly in industrial areas. Cooled; isothermal or heated air supply is needed in halls, where thermal loads are changing. RA-EB air displacement vent series are suitable both for cooling and heating. An adjustable air control disc ensures thorough ventilation of the whole hall in heating mode. The air control disc is in upper position, when heating is on. The air control disc can be adjusted either manually using a chain pull or electrically with an actuator. RA-EB air displacement vent series blow the air horizontally with high discharge momentum. It’s advisable to use air displacement vent units, where the recommended supply air temperature differential is in the range of -8K to +12K or in halls with heights of 3.5-10 m