Double Deflection Register – Fixed CoreDouble Deflection Registers are generally used in sidewall applications. They consist of two separate rows of individually adjustable vanes front and rear. Features: Front Vanes horizontal so the primary air leaving the outlet is directed above the room occupants and does not reach the occupied zone until well mixed with the secondary room air. Rear Vanes vertical and are used to direct the air in a straight blow or spread the air as required by the