Strata is what happens when Vornado reimagines cooling airflow from the ground up. When it comes to velocity, strata are Vornado's highest performing fan, ever. Period. True to form, Vornado took the traditional approach to blower design and molded it into our vision for powerful air movement in a remarkably thin profile. Strata harvest the coolest air near the ground and draws it upwards-where you can enjoy it. A user-selectable 90º or 180º oscillation range creates a satisfying, sweeping panoramic airflow experience. On low speed, strata register below 32db, making it quieter than the standard interior space.