RA3 Recirculating Air Conditioning Unit Armfield’s Recirculating Air Conditioning Unit is a climate control demonstration unit. Variable louvres within the unit allow investigation of 0 to 100% re-circulation. See more here> Post navigation Understanding Structural BehaviourArmfield launches its new laboratory Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment.