Patented high capacity, low profile swirl diffuser with variable air pattern adjustment for cooling and heating of large volume or high ceiling spaces. Installation flush with ceiling or free-hanging. Swirl vanes with helical twist deliver high volume airflow capacity and large airflow range. Adjustable blades and guide-ring assembly slide helically across radially off-set swirl vanes flush with diffuser face for variable discharge direction adjustment (manual, thermal or electric) at a low and substantially constant pressure loss and with high induction discharge in both cooling and heating modes.
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