Evacuation central station with blowers type CGA functions to make the operation theatres and rooms free from vacuum that the patients breath out later surgery. The plant is a two sided channel blower leading by two side channel blowers leading to the requisite of the plant to which it has been connected. Key Elements - The electric card instant an automatic exchange of blowers to maintain the functionality. - All central stations are dimensioned bestow to the plant requirements with a single blower, keeping the second blower in emergency case like damages. A push bottom should be pressed that is placed on the distance alarm so as to operate the equipment to maintain the required distance.